Horikawa Sen-Nin Chosatai 2010 Summary Meeting for the 14Th Stage

Horikawa Sen-nin Chosatai 2010 Summary meeting for the 14th stage

The Secretariat of Horikawa Sen-nin Chosatai Photos : Goryosui-ato-gaien-aigokai Survey Group Kawasemi Survey Group Feb. 15th 2014 1 Water environment of Horikawa

Are of basin： 51.9km2 Length: 16.2km

Change of Temperature, precipitation, hours of sunshineThe source 私たちが使っている水の水源は木曽川です

植物プランクト水の汚れの主な原因は家庭や工場や店舗などからの排水ですンの繁殖のもと（窒素やリン）は、汚れた水は水処理センターで処理されてから放流されています●●● ●●● 訳しかけましたが、●●● ●●● 家庭や工場や店舗などの排水にたくさん雨が降ると汚れた水がそのまま Shonai River ●●● 含まれています放流されることもあります ●●● ●●● ●●● Water treatment center Sanage Bridge 12Tide 回目の概要のgate ▼high tide Horikawa 赤潮や青潮のように潮の干満の差が２ｍ以上の時もありますなる時がありました ▼干潮名古屋港や堀川の下潮の干満によって水位、流れの向き・速さが変化します流域では植物プラン清水わくわく水 2ページ目と同じです。Ise Bay Nagoya port クトンなどが増殖と死巻きあげ Ground water etc 滅を繰り返すことで水域がさらに汚れるといわれていますヘドロが浮かび上がったり、巻き上がったりする時があ Red tide Bler tide りました

ヘドロ浮上の状況ヘドロ巻上げの状況４ Investigation spots Number of Participants of Horikawa Sen-nin Chosatai 2010 Network of citizens who make a (Horikawa Sen-nin Chosatai started accepting wish for clarification and participation on 26th Mar. 2007) restoration of the Horikawa River has grown

Start Now 22nd Apr. 2007 15th Feb. 2014

Fixed Point 55 groups 95 groups Observation Groups 497 persons 980 persons

Free Survey 22 groups 40 groups Groups 234 persons 650 persons

Horikawa 88 groups 2,514 groups Cheering Groups 1,531 persons 49,934 persons

165 groups 2,649 groups Total 2,262 persons 51,564 persons ５ Number of Participants of Horikawa Sen-nin Chosatai

Change in Participants

Fixed Point Horikawa Free Survey Groups Total Observation Groups Cheering Groups Total 51,564 persons

Fixed Point Observation Groups : 980 persons Free Survey Groups : 650 persons Horikawa Cheering Groups : 49,934 persons

1st stage 3rd stage 5th stage 7th stage 9th stage 11th stage 13th stage

2nd stage 4th stage 6th stage 8th stage 10th stage 12th stage 14th stage

Number of Participants of Number

Apr. 2011 Apr.

Oct.2011

Apr. 2012 Apr. Apr. 2007 Apr. 2008 Apr. 2009 Apr. 2010 Apr. 2013 Apr.

Jun.2011

Oct.2007 Oct.2008 Oct.2009 Oct.2010 Oct.2012 Oct.2013

Jun. 2010Jun. Jun.2007 Jun.2008 Jun.2009 Jun.2012 Jun.2013

Feb.2011

Aug. 2011 Aug. 2011 Dec.

Feb.2014 Feb.2008 Feb.2009 Feb.2010 Feb.2012 Feb.2013

Aug. 2007Aug. 2007Dec. 2008Aug. 2008Dec. 2009Aug. 2009Dec. 2010Aug. 2010Dec. 2012Aug. 2012Dec. 2013Aug. 2013Dec. Month and Year

February 15th , 2014 ６ Survey Period and Number of Reports of Survey Results Number of Survey Period Reports 1st stage Spring - Early Summer/ Apr. 22nd - Jun. 30th. 2007 258 interval Jul. 1st - Sep. 7th. 2007 134 2nd stage Autumn - Early Winter/ Sep. 8th - Dec. 16th. 2007 383 interval Dec. 17 - Mar. 31st. 2007 103 3rd stage Spring - Early Summer/ Apr. 1st - Jun. 30th. 2008 245 interval Jul. 1st - Sep. 27th. 2008 64 With TRWKR 4th stage Autumn - Early Winter/ Sep. 28 - Dec. 16th. 2008 152 interval Dec. 17th - Mar. 31st. 2009 100 5th stage Spring - Early Summer/ Apr.1st - Jun. 30th. 2009 145 interval Jul. 1st - Sep. 26th. 2009 54 6th stage Autumn - Early Winter/ Sep. 27th - Dec. 16th. 2009 120 interval Sep.17th.2009 - Mar. 31st. 2010 81 Introduction of advanced water 7th stage Spring - Early Summer/ Apr. 1th - Jun. 30th. 2010 111 treatment at the Meijo Water interval Jul.1st - Sep.11th. 2010 44 Treatment Center 8th stage Autumn - Early Winter/ Sep. 12th - Dec.17th. 2010 104 interval Dec.18th 2010 - Mar. 31st. 2011 72 In-service of Horikawa 9th stage Spring - Early Summer/ Apr.1st - Jun. 30th. 2011 112 Ugan Rain-water Reservoir interval Jul.1st - Sep.10th. 2011 42 for pollution control 10th stage Autumn - Early Winter/ Sep.11th - Dec.16th. 2011 133 Utilization of reclaimed interval Dec.17th 2011 - Mar. 31st 2012 77 wastewater from Moriyama 11th stage Spring - Early Summer/ Apr. 1st - Jun. 30th. 2012 148 Water Treatment Center interval Jul.1st - Sep. 21st. 2012 60 from Apr. to Oct. 12th stage Autumn - Early Winter/ Sep.22nd - Dec.16th. 2011 139 interval Dec.17th 2012 - Mar.31st. 2013 92 13th stage Spring - Early Summer/ Apr.1st - Jun.30th. 2013 145 interval Jul. 1st - Sep. 28th. 2013 70 14th stage Spring - Early Summer/ Sep. 29th - Dec. 17th. 2013 113 Total 3,301 ８ Column “To clarify and restore Horikawa River” Horikawa Sen-nin Chosatai 2010, which is composed of Fixed Point Observation Groups, Free Survey Groups and Horikawa Cheering Groups, made a start as a place for citizens’ activities to clarify and restore Horikawa River on April 22nd, 2007.

Fixed Point Observation Groups survey clarification effect of Horikawa by Transmission of Raw Water from the Kiso River (TRWKR) with a view point and sense of citizens. Free Survey Groups research Horikawa by free theme. Horikawa Cheering Groups support clarification and restoration of Horikawa. These three kinds of groups cooperate each other in the big network for clarification and restoration of Horikawa.

There are 95 Fixed Point Observation Groups, 40 Free Survey Groups and 2,514 Horikawa Cheering Groups, the total is 2,649 groups and 51,564 persons as of Feb.15, 2014.

Compared with the number of groups and participants, 165 groups and 2,262 persons, at the start, network of people who wish clarification and restoration of Horikawa has developed.

Fixed Point Observation Groups have made surveys at 3,301 times from 1st stage to 14th stage. Those surveys show that the situation in the area of the downstream from Sanage Bridge variously changes as the tide rises and falls from hour to hour in Horikawa basin. We learned that various surveys at various time, place and tidal situation enable us to understand average and change of water quality in Horikawa. And it was confirmed that water quality was improved roughly between Sanage Bridge and Matsushige Bridge for five years of pilot project. It was also confirmed that artificial garbage was reduced during this period. So it is supposed that citizens’ awareness has changed for example cleaning activities are held a lot.

～Pilot project for clarification of Horikawa “Clarification effect by TRWKR from April 2007 to March 2012 was confirmed”～【Summary】 ■Clarification effect by TRWKR was confirmed between Sanage Bridge and Matsushige Bridge ■Network of citizens who make a wish for clarification and restoration of Horikawa has grown ■Awareness of clarification of Horikawa advanced ９ ■ Summary of 14th stage （Autumn – Early winter, 2013） As for the weather of the 14th stage, the day (the record of a tropical day and a summer day was broken) high-temperature continued till the middle of October. On the other hand, temperature became low rather than normal under the influence of the cold air mass in November and afterwards. Moreover, much rain fell because of a low pressure, a front and a typhoon. Especially on September 4th, it rained heavily, 100 mm or more per hour, at some points in Nagoya including Horikawa's valley and refuge preparation information was taken out to the whole region in Nagoya. The level of Horikawa became so high that it had not been observed by investigating group activity.

Photo : .Kawasemi Investigation Group Nishiki Bridge 4th Sep, 2013 There was the rainy day like September 4, but the daylight hours in September was long because there were many fine day. In October, it was short because of much cloudy weather under the influence of a low pressure and a front. In November and December, it was approximately the same level as annual.

Result of survey in 14th stage, from Sanage Bridge to Minatoshin Bridge, are as follows. Impression of clearness is better broadly than 12th stage’s, but is worse slightly than 10th stage’s. (12th stage is a same season in 2013, blue and red tide occurred. 10th stage is a same season in 2012.) 60 percent of impression of clearness was estimated by color, and dark color increased. Contents that changed remarkably in 14th stage were bubble, smell and color. Especially, there is no report that bubble rose from bottom, and that smell was terrible. We think that improvement of bubble rising from bottom and smell is involved with a state of sludge on bottom of Horikawa. １３ We think concretely, in 14th stage, an outflow of surface sludge by freshet of Horikawa (ex. record fast rain on Sep. 4th) and new water quality improvement measure after the stop of TRWKR made the bottom better temporarily and the condition has been kept. This improvement of bubble and smell is similar to those of 3rd year of TRWKR. In 14th stage, the condition of the bottom improved temporarily. So we got knowledge to think realistically of condition of bubble and smell when bottom of Horikawa improves. source：p.62

１４ In 14th stage, about 60 percent of impression of clearness was estimated by color, and dark color was often reported. We think that cloud of water improved with decreasing rising of sludge and dark gray sludge on the bottom effected the water color when we observed. We think that we need to gather knowledge of relation between the water color and the bottom color from now on. source：this report p.75

Reason of increasing dark color in 14th stage

Change of impression on color of bottom and cleanness？

Observing water color Observing water color Observing water color

low

improved improved improved

water water water high bottom bottom bottom white bottom black bottom １５

Causation is not clearly, but as if supporting improvement of water and bottom quality of Horikawa, many mullet swam up to end of upstream on tidal area. But there was no report about seeing many swimming mullet at midstream, Naya or Nishiki Bridge. A group of mullet was seen at Nishiki Bridge in November, but it was not a large quantity. We think the water and the bottom quality were good so mullet moved at not surface but middle or bottom. So we suppose that the water and the bottom quality were good including midstream, around Naya or Nishiki Bridge.

Many mullet swam up to end of upstream on tidal area report/photo by Jan. 18th 2014 Johoku Bridge～Kinjo Bridge Goyousui-ato-gaien-aigokai Survey Group/Secretariat

Jan. 24th 2014 Sanage Bridge Provisional raw water transmission from Shonai River resumed. 今回のボラの大量遡上 Reviving mullet.

平成26年1月18日～

Jan. 23rd 2014 Shiga Bridge – Kurokawa Bridge They treaded water. Dozens of mullet were dead.

Provisional raw water transmission from Shonai River suspended. 16 Data：Japan Meteorological Agency Data of meteorological 14th stage conspectus statistics Nagoya Local Meteorological Observatory Weather http://www.jma.go.jp/jma/menu/report.html Sep.29th～Dec.17th 2013 The heat wave Sep. 4th Sep. 16th Typhoon No.18 In October the record for extended in August. It rained over 100mm a hour. The rainfall was 101mm. high temperature was broken.

Aug. 22nd Sep. 4th Sep. 16th Nov. 13th It was fair and hot. The Typhoon No.17 changed to tropical The special warning against heavy It held hot everywhere. The record temperature was over 35℃ in the atmospheric pressure. Because of rain was published for the first for high temperature was broken west Japan or the central Japan this cyclone and a front, It was time. Typhoon No.18 hit Japan. in many points. heavy rain in the west Japan. Oct. 15th-16th Typhoon No.26 Oct. 20th November The rainfall was 113.5mm. The rainfall was 83mm for a front. Cold came.

Oct. 15th Oct. 16th Oct. 20th Nov. 13th Cold air came and Typhoon No.26 went up north. It Because of Typhoon and It rained in almost all Japan. The condition of pressure was about rained from dawn, and rain stationary front, it was record rainfall was over 100mm a day in winter, so it was snowy or rainy in became heavier in the afternoon. heavy rain. some points. the north Japan. It was cold or cool in the whole Japan. 17 Weather Condition It rained over 100mm per hour in the several spots of Nagoya, and large areas The number of typhoons in 2013 was 31 and larger than in an were flooded. Because of this heavy rain average year(25.6). Three of them was approaching Tokai area. and flood, Nagoya city announced the Typhoons brought about terrible weather. Especially, when evacuation order officially . typhoon No.18 and No.26 were approached, each of total rainfall was over 100mm. Additionally, daily rainfall of October 20 was September 4 2013_Tenma bridge Shooting:Kawasemi investigative team over 80mm.

Trend of the weather in the 14th stage(2013) ■Temperature ・Extremely hot days continued from summer before the 14th stage, and the record of the maximum temperature in October was revised. Therefore, temperatures of September and October were higher than the average. On the other hand, after November, the temperature was lower than the average because of the cold air mass caused by the high pressure extended from Eurasia. The monthly average temperature in this stage was sort of higher than the average. Nagoya Local Meteorological Agency: average value

■Precipitation total temperature total section (℃) ・It rained a lot because of a front and the typhoon. Therefore, rainfalls rainfall hours of of September, October and December were more than the average. On (mm) average max minimum sunlight the other hand, the precipitation of November was less than the Statistics 1981 1981 1981 1981 1981 average because of the high pressure extended from Eurasia. The data period -2010 -2010 -2010 -2010 -2010 monthly average rainfall of this stage was more than the average and Years of data 30 30 30 30 30 almost the same as the 10th stage. April 143.3 14.1 19.5 9.2 188.4 May 155.7 18.5 23.7 14 199.6 ■Hours of sunlight June 201.5 22.3 26.7 18.7 145.2 ・Hours of sunlight from August to September was long, because Pacific average 166.8 18.3 23.3 14 177.7 high pressure was extended and fine days increased. Hours of September 249.8 23.4 28 20 141.9 sunlight in October was short, because cloudy days increased, it was October 116.9 17.6 22.4 13.5 165.6 influenced by low pressure and a front and so on. From November to November 79.5 11.9 16.7 7.6 159.7 December, hours of sunlight was almost the same as the average. December 36.8 6.7 11.4 2.6 169.7 Monthly average hours of sunlight in this stage was almost the same average 120.8 14.9 19.6 10.9 159.2 as the average. Japan Meteorological Agency, weather statistics information at Nagoya Local Meteorological Agency 18 http://www.jma.go.jp/jma/menu/report.html Japan Meteorological Agency, weather statistics Weather Condition information at Nagoya Local Meteorological Agency http://www.jma.go.jp/jma/menu/report.html

Extremely hot days continued from summer before the 14th stage, and the record of the maximum temperature in October monthly mean was revised. Therefore, temperatures of September and October were higher than the average. On the other hand, after November, the temperature was lower than the average because of the cold air mass caused by the high pressure extended from Eurasia continent. The monthly average temperature in this stage was sort of higher than the average. 19 Weather Condition Japan Meteorological Agency, weather statistics information at Nagoya Local Meteorological Agency Change in the temperature http://www.jma.go.jp/jma/menu/report.html

2011_10th stage 2012_12th stage 2013_14th stage 35 In 2013 the temperature of Aug. and Oct. became high 30 because the Pacific high pressure increased extended.

) ℃ ( 20

15 ave.temperature

After Nov. 2013, the 5 temperature became low because of the cold mass.

0 8/1 9/1 10/1 11/1 12/1

20 Japan Meteorological Agency, weather statistics Weather Condition information at Nagoya Local Meteorological Agency Change in the precipitation http://www.jma.go.jp/jma/menu/report.html

Sep.19～21:Typhoon No.15 Total precipitation 274mm

Sep.30:Typhoon No.17 Daily precipitation: 92.5mm

Sep.4:Several observatory in Nagoya Rainfall per hour over 100mm

Sep.16:Typhoon No.18, daily precipitation 101mm Oct.15～16:Typhoon No.26 Total precipitation 113.5mm Oct.20:a front Daily precipitation 83mm

In the 14th stage, it rained a lot because of a front and the typhoon. Therefore, precipitation of September, October and December was more than the average. On the other hand, the precipitation of November was less than the average because of the high pressure in Eurasia. The monthly average precipitation of this stage was more than the average and almost the same as the 10th stage. 21 Japan Meteorological Agency, weather statistics Weather Condition information at Nagoya Local Meteorological Agency Change in hours of sunlight http://www.jma.go.jp/jma/menu/report.html

Hours of sunlight from August to September was longer because Pacific high pressure was extended and fine days increased. Hours of sunlight in October was short because cloudy days increased, it was influenced by low pressure and a front and so on. From November to December, hours of sunlight was almost the same as the average. Monthly average hours of sunlight in this stage was almost the same as the average. 22 １．Impression of Water Cleanness

25 The１st～６th stage Impression of Water Cleanness .With TRWKR * .No rain on the day and the previous day “The ratio of " clean","slightly clean" and"ordinary" The ７th～１４th stage .No TRWKR .Norain on the day and the previous day * Note)%:The ratio of “clean”,“slightly clean" and"ordinary" .A few data .No data on 7th～10th, 12th,13th,14th stage

The ratio of “clean”, “slightly clean” and “ordinary” between Matsushige Bridge and Johoku Bridge was lower than other area.

Improved a little on 14th stage

Number of data 3 2 5 2 2 1 0 0 0 0 2 0 0 0 15 35 33 9 29 25 30 21 25 35 27 26 35 28 46 103 82 28 3716 25 25 22 4343 40 35 25 12 21 14 2 13 4 6 5 9 12 14 12 7 11 37 47 42 11 30 17 24 16 20 23 27 20 16 17 31 41 15 2 8 3 5 8 5 9 9 8 8 7

Not enough data Not enough data

■ How did the impression of water cleanness change? ・The ratio of “clean”, “slightly clean” and “ordinary” between Johoku Bridge and Matsushige Bridge was low. ・The impression of water cleanness between Johoku Bridge and Matsushige Bridge was improved on the 14th stage.However it was worse than other area. * “clean”, “slightly clean” and “ordinary” are categorized as the acceptable range for citizens. 26 The 1st,3rd,5th stage Impression of Water Cleanness .With TRWRKR .No rain on the day and the previous day From Spring to Early Summer The 7th,9th,11th,13th stage .NoTRWKR The percentage of people who answered between “clean” and “ordinary” .No rain on the day and the previous day

Note : Answers we got from Minatoshin Bridge to Oseko Bridge and from Sanage Bridge to Sakae Bridge are not counted because we got few answers there.

The average from Oseko Bridge to Sanage Bridge

With TRWKR

Introduction of advanced water treatment at the Meijo Water Treatment Center

In-service of Horikawa Ugan Rain-water Reservior for pollution control

Utilization of reclaimed wastewater

Rising trend during Declining trend after the transmission stopping the transmission

Improved

■ How did the impression of water cleanness change (spring ~ early summer) ? →It seemed that water cleanness is rising trend during the transmission. In 7th stage after the stop of TRWKR, water cleanness was deteriorated. But afterward impression of water cleanness was improved. This is considered to be an effect of the new water quality improvement measures. “ ” “ ” “ ” * clean , slightly clean and ordinary are categorized as the acceptable range for citizens. 27 The 2nd,4th,6th stage Impression of Water Cleanness With TRWKR No rain on the day and the previous day

from Autumn to Early Winter The 8th,10th,12th stage No TRWKR The percentage of people who answered between “clean” and “ordinary” No rain on the day and the previous day Note : Answers we got from Minatoshin Bridge to Oseko Bridge and from Sanage Bridge to Sakae Bridge are not counted because we got few answers there. The average from Oseko Bridge to Sanage Bridge With TRWKR Introduction of advanced water treatment at the Meijo Water Treatment Center

In-service of Horikawa Ugan Rain-water Reservior for pollution contorl

Rising trend during the transmission Declining trend during the transmission Deteriorated (Occurrence of blue tide etc)

Improved

■How did the impression of water cleanness change (autumn ~ early winter) ? →It seemed that during the transmission water cleanness was improved in 4th stage. But, it was deteriorated in 6th stage. After stopping the transmission, it was remained at the same level until 10th stage. But it was deteriorated in 12th stage because of the occurrence of blue tide. In the 14th stage, impression of water cleanness was improved a little, but the ratio in 14th stage was lower than in 10th stage. * “clean”, “slightly clean” and “ordinary” are categorized as the acceptable range for citizens. 28 The 1st,3rd,5th stage ・With TRWKR Impression of Water Cleanness ・No rain on the day and the previous day The 7th,9th,11th stage from Spring to Early Summer ・No TRWKR ・No rain on the day and the previous day “The percentage of people who answered between “clean” and “ordinary”* Note : Answers we got from Minatoshin Bridge to Oseko Bridge and from Sanage Bridge to Sakae Bridge are not counted because we got few answers there.

With TRWKR Introduction of advanced water treatment at the Meijo Water Treatment Center In-service of Horikawa Ugan Rain-water Reservior for pollution control

Utilization of reclaimed wastewater

29 Impression of Water Cleanness The 1st/3rd/5th Stage ： with TRWKR No rain on the day and the previous day The 7th/9th/11th Stage： No TRWKR from Autumn to Early Winter No rain on the day and the previous day The ratio of “clean“, ”slightly clean”, and “ordinary”

Deteriorated Improved Improved Deteriorated Improved Deteriorated

Deteriorated Improved Improved Improved Improved Improved Deteriorated Deteriorated Deteriorated

30 Impression of Water Cleanness 2nd・4th・6th stage ： with TRWKR No rain on the day and the previous day from Autumn to Early Winter 8th・10th・12th stage： No TRWKR The ratio of “clean“, ”slightly clean”, and “ordinary” No rain on the day and the previous day Note : except “Minatoshin Bridge – Ohseko Bridge” , “ Sanage Bridge – Sakae Bridge” for not enough data

With TRWKR Introduction of advanced water treatment at the Meijo Water Treatment Center

In-service of Horikawa Ugan Rain-water Reservior for pollution control

31 Impression of Water Cleanness 2nd・4th・6th stage ： with TRWKR No rain on the day and the previous day from Autumn to Early Winter 8th・10th・12th stage： No TRWKR No rain on the day and the previous day The ratio of “clean“, ”slightly clean”, and “ordinary”

improved Deteriorated improved Deteriorated Deteriorated

improved improved

Deteriorated improved Deteriorated improved Deteriorated Deteriorated Deteriorated improved improved

32 2nd to 6th Stage : With TRWKR Change of Evaluation of No rain of the day and previous day 7th to 12th Stage : No TRWKR Impression of Water Cleanness No rain of the day and previous day

Note : Not displayed data of 0%

With TRWKR With Increased

- Decreased

Rain

Ugan

Increased

Horikawa

Water Treatment Center Treatment Water

Meijyo

Utilization Utilization of Reclaimed Wastewater

service of of service

In Control Pollution for Reservoir water

Introduction of Advanced Sewerage Treatment Treatment Sewerage Advanced of Introduction the at

How did the change of evaluation of impression of water cleanness? →Main evaluation of impression of water cleanness were “color”, “clarity” and “garbage”. After 9th stage, “color” was most evaluated. At the stage from autumn to early winter (2nd ,4th ,6th ,8th ,10th ,12th and 14th Stage), the ratio of “color” was increased, during the period of TRWKR. At 8th stage, after finished TRWKR, the ratio of evaluation of color was decreased, but after that, the ratio of evaluation of color was increased to 14th stage. At 14th stage, the ratio of color is 62%. It was almost same level“60%” at 6th stage. We consider that we need more data and analysis to know the relationship of impression of water cleanness and water color, becouse water color is affected multiply about “blue tide”, “phytoplankton include with red tide”, and “color of riverbed” 33 Evaluation of impression of Water Cleanness 1st stage: No data From Sanage Brdg. To Minatoshin Brdg. 2nd to 6th stage: With TRWKR No rain on the day and the previous day TRWKR Introduction of an advanced water treatment at Meijo Water Treatment Center 7th–14th stage： Without TRWKR In-service of Horikawa Ugan Rain-water Reservoir for pollution control No rain on the day and the previous day Utilization of reclaimed wastewater at Moriyama Water Treatment Center The criterion for evaluation when people answered “clean”, “slight clean”, “ordinary”. ■ How was the criterion for evaluation With TRWKR when people answered “clean”, “slightly clean”, “ordinary”? →In “autumn - early winter (8th,10th,12th,14th stage)” after the stop of TRWKR, the evaluations of “Water color" have increased. There were the most evaluations of "Water color" in 14th stage, the evaluations of "Water color " were 59% No data

The evaluations of "Water color " have increased.

Number of data 91 47 31 33 27 9 31 14 49 27 20 19 27

The criteria for evaluation when people answered “slight dirty” and “dirty”.

With TRWKR ■ What were the criteia for evaluation when people answered “slight dirty” and “dirty”? →Over 50% of people evaluated on "Water color".

No data Over 50% of people evaluated on "Water color".

Number of data 104 127 21 77 36 75 36 61 63 86 77 73 54 34 Change of Impression of Water Cleanness The percentage of people who answered “clean”, “slight clean”, “ordinary”. The 1st – 14th stage

Impression of water cleanness from Shinsuzaki Bridge to Habashita Bridge is bad.

＊less times of investigation

■ Which section’s impression was bad? →Impression of water cleanness from Shinsuzaki Bridge to Habashita Bridge is bad. The percentage of people who answered “clean”, “slight clean”, “ordinary” was under 20% between Keiun Bridge and Habashita Bridge. “Clean”, “slight clean” and “ordinary” are categorized as the acceptable range for citizens. 35 2.Transparency

Measuring transparency

Photo: Survey Group of Team NTT Smile Nagoya

Photo: Shinko Survey Group

Relationship between the impression of cleanness and the average of transparency(clearness) 2nd-9th stage , No rain , Including out-of-period data Impression of cleanness : Evaluated by clearness All sections (including the upper reaches)

Ralationship between the impression of cleanness and transparency(clearness)

“Clear”-”Ordinary” are acceptable range for citizens

Over 70cm transparency

Clear Slightly Ordinary Slightly Dirty Transparency(cm) , , evaluated by Transparency(cm) clearness clear dirty Impression of water cleanness , evaluated by clearness

Transparency over 70cm can be an indicator to improve impression of water cleanness. Photo: Kawasemi survey group Note )The values over 100cm are treated as 100cm. Reference: The reports for the HSC 10th stage meeting ３７ 1st - 6th stage： With TRWKR No rain on the day and the previous day Change of Transparency 7th–14th stage： Without TRWKR No rain on the day and the previous day

Not enough data The transparency was low between Asahi Brdg. and Johoku Brdg..

Not enough data

3 2 5 2 2 1 0 0 0 0 2 0 0 11 30 33 9 2925 3021 24 3326 25 34 29 22 74 55 18 2916 22 22 2040 4130 3324 9 16 9 1 11 3 6 5 8 1214 11 7 11 13 35 32 8 2617 2016 20 23 26 18 16 17 3 41 13 2 8 3 5 8 5 9 9 7 8 7 Not enough data Note )The values over 100cm are treated as 100cm. No data for 7th-10th・12th-14th stages for not enough data

38 1st 3rd 5th stage：With TRWKR Change of Transparency・・・Spring-Early Summer No rain on the day and the previous day Note) Except the data of “Minatoshin Brdg.-Oseko Brdg.” and “Sanage Brdg.-Sakae Brdg.” for not enough data. 7th,9th,11th,13th stage：Without TRWKR No rain on the day and the previous day

The average from Oseko Bridge to Sanage Bridge WithTRWKR Introduction of an advanced water treatment at Meijo Water Treatment Center

In-service of Horikawa Ugan Rain-water Reservoir for pollution control

Utilization of reclaimed wastewater at Moriyama Water Treatment Center Tendency of improvement Acceptable range of citizens during TRWKR period More than 70cm Deteriorated after the stop of TRWKR Improved

Note )The values over 100cm are treated as 100cm.

■ How did the transparency change (spring - early summer) ？ →During TRWKR period, we observed the improvement of transparency. Ｉn 7th stage, after the stop of TRWKR, transparency was deteriorated. But afterward we observed the improvement of transparency again. This is considered to be an effect of the new water quality improvement measures. The transparency in “spring-early summer” dose not meet 70cm which is the acceptable range of citizens. 39 Change of Transparency・・・Autumn-Early Winter 2nd,4th,6th Stage： With TRWKR No rain on the day and the previous day 8th,10th,12th Stage： Without TRWKR Note) Except the data of “Minatoshin Brdg.-Oseko Brdg.” and “Sanage Brdg.-Sakae Brdg.” for not enough data. No rain on the day and the previous day

The average from Oseko Bridge to Sanage Bridge With TRWKR Introduction of an advanced water treatment at Meijo Water Treatment Center In-service of Horikawa Ugan Rain-water Reservoir for pollution control Leveling Deteriorated After the stop of TRWKR Leveling

Acceptable range of citizens More than 70cm

Note )The values over 100cm are treated as 100cm.

■ How did the impression of cleanness change (spring-early summer) ？ →Ｉn 7th stage after the stop of TRWKR, transparency was deteriorated. But afterward it generally continues to be flat. The transparency in “autumn - early winter” meets 70cm which is the acceptable range of citizens. 40 The 1st, 3rd, 5th stage ・With TRWKR Change of Transparency・・・Spring～Early Summer ・No rain on the day and the previous day The 7th, 9th, 11th , 13th stage ・No TRWKR Note) Except the data of “Minatoshin Brdg.-Oseko Brdg.” and “Sanage Brdg.-Sakae Brdg.” for not enough data ・No rain on the day and the previous day

Oseko Br. ～ Matsushige Br. Matsushige Br. ～ Asahi Br.

Asahi Br. ～ Johoku Br. Johoku Br. ～ Sanage Br. 100 With TRWKR Introduction of advanced water treatment at the Meijo Water Treatment Center In-service of Horikawa Ugan Rain-water Reservior for pollution control

80 Utilization of reclaimed wastewater at Citizens’ acceptable range: 71 Moriyama Water Treatment Center 70cm or more 68 66 (cm) 65 64 63 61 60 61 60 59 59 58 58 58 60 56 56 57 57 54 54 53 52 52 51 50 48 43

Transparency Transparency 40

0 Apr.22～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 2007 2008 2009 2010 2011 2012 2013 1st stage 3rd stage 5th stage 7th stage 9th stage 11th stage 13th stage

Note )The values over 100 cm are treated as 100cm.

41 The 1st, 3rd, 5th stage ・With TRWKR Change of Transparency・・・Spring～Early Summer ・No rain on the day and the previous day The 7th, 9th, 11th , 13th stage ・No TRWKR ・No rain on the day and the previous day

Oseko Br. ～ Matsushige Br. Asahi Br. ～ Johoku Br.

100 100

Trend to Improve 80 80 Worsen Improve Improve 61 59 56 56 57 58 59 60 54 60 52 54 48 51 50

43 Transparency(cm) Transparency (cm)Transparency 40 40

20 20

0 0 Apr.22～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 Apr.22～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 Apr.1～Jun.30 2007 2008 2009 2010 2011 2012 2013 2007 2008 2009 2010 2011 2012 2013 1st stage 3rd stage 5th stage 7th stage 9th stage 11th stage 13th stage 1st stage 3rd stage 5th stage 7th stage 9th stage 11th stage 13th stage

Matsushige Br. ～ Asahi Br. Johoku Br. ～ Sanage Br. Trend to Improve 100 100 Trend to Improve Improve Worsen Improve 80 Worsen 80 71 65 68 66 61 64 63 60 60 57 58 58

60 53 52 60 Transparency (cm)Transparency Transparency (cm)Transparency 40 40

20 20

42 The 2nd, 4th, 6th stage ・With TRWKR Change of Transparency・・・Autumn～Early Winter ・No rain on the day and the previous day The 8th, 10th, 12th , 14th stage Note) Except the data of “Minatoshin Brdg.-Oseko Brdg.” and “Sanage Brdg.-Sakae Brdg.” for not enough data ・No TRWKR ・No rain on the day and the previous day

Oseko Br. ～ Matsushige Br. Matsushige Br. ～ Asahi Br. Asahi Br. ～ Johoku Br. Johoku Br. ～ Sanage Br.

With TRWKR Introduction of advanced water treatment at the Meijo Water Treatment Center In-service of Horikawa Ugan Rain-water Reservior for pollution control 100 95 92 89 90 87 87 85 84 83 83 80 81 79 79 78 80 77 77 77 74 75 75 Citizens’ acceptable range: 70cm or more 67

(cm) 65

60 57 57 56 50 45

Transparency Transparency 40

0 Sep.8～Dec.16 Sep.28～Dec.16 Sep.27～Dec.16 Sep.11～Dec.17 Sep.11～Dec.16 Sep.22～Dec.16 Sep.29～Dec.17 2007 2008 2009 2010 2011 2012 2013 2nd stage 4th stage 6th stage 8th stage 10th stage 12th stage 14th stage

Note )The values over 100 cm are treated as 100cm. 43 The 2nd, 4th, 6th stage ・With TRWKR Change of Transparency・・・Autumn～Early Winter ・No rain on the day and the previous day The 8th, 10th, 12th , 14th stage ・No TRWKR ・No rain on the day and the previous day Oseko Br. ～ Matsushige Br. Trend to Improve Asahi Br. ～ Johoku Br.

100 95 100 89 87 85 83 83 81 80 80 74 Worsen 65 Worsen Improve 57 57 56 60 60 50

45 Transparency (cm)Transparency 40 (cm)Transparency 40

20 20

0 0 Sep.8～Dec.16 Sep.28～Dec.16 Sep.27～Dec.16 Sep.11～Dec.17 Sep.11～Dec.16 Sep.22～Dec.16 Sep.29～Dec.17 Sep.8～Dec.16 Sep.28～Dec.16 Sep.27～Dec.16 Sep.11～Dec.17 Sep.11～Dec.16 Sep.22～Dec.16 Sep.29～Dec.17 2007 2008 2009 2010 2011 2012 2013 2007 2008 2009 2010 2011 2012 2013 2nd stage 4th stage 6th stage 8th stage 10th stage 12th stage 14th stage 2nd stage 4th stage 6th stage 8th stage 10th stage 12th stage 14th stage

Matsushige Br. ～ Asahi Br. Johoku Br. ～ Sanage Br. Trend to Improve 100 90 92Worsen 100 84 87 Worsen 79 78 80 79 80 77 77 80 77 75 75 67

60 60 Transparency (cm)Transparency Transparency (cm)Transparency 40 40

20 20

44 ３．ＣＯＤ

Chemical Oxygen Demand It shows the organic pollution level mainly at the sea area and lakes. It means the amount of oxygen which react(oxidize) with organic substance underwater. The higher the value of COD, the higher the pollution level.

ＣＯＤ measurement Test

（How to measure COD）

45 1st - 6th stage： With TRWKR No rain on the day and the previous day Change of COD 7th – 14th stage： No TRWKR No rain on the day and the previous day

20 1st stage Apr.22～Jun.30 2007 2nd stage Sep.8～Dec.16 2007 3rd stage Apr.1～Jun.30 2008 4th stage Sep.28～Dec.16 2008 5th stage Apr.1～Jun.30 2009 6th stage Sep.27～Dec.16 2009 18 7th stage Apr.1～Jun.30 2010 8th stage Sep.11～Dec.17 2010 9th stage Apr.1～Jun.30 2011 10th stage Sep.11～Dec.16 2011 11th stage Apr.1～Jun.30 2012 12th stage Sep.22～Dec.16 2012 13th stage Apr.1～Jun.30 2013 14th stage Sep.29～Dec.17 2013 16 16 15 15 COD in Matsushige Bridge-Minatoshin Bridge 15 14 14 14 is lower than in Sanage Bridge-Matsushige 14 13 Bridge 13 13 13 13 13 13 13 12 12 12 1212 12 12 12 12 11 11 11 11 11 11 11 11 11 11 11 11 11 1010 10 10 1010 10 10 10 10 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 99

COD(mg/L) 8 8 8 8 8 8 7 7 7 7 7 6 6 6 4 4

Horikawa River Confluence River Horikawa - Nagpya Port Nagpya COD in “spring-early summer” is

2 Shim mostly higher than in “autumn-early

Transmission of Raw Wtater from Kiso River Kiso from Wtater Raw of Transmission Transmission of Raw Wtater from Shonai River Shonai from Wtater Raw of Transmission winter”. Center Treatmen Water Meijo 0 Minatoshin Br. Oseko Br. Matsushige Br. Asahi Br. Johoku Br. Sanage Br. ～OsekoBri. ～Matsushige Br. ～Asahi Br. ～Johoku Br. ～Sanage Br. ～Sakae Br. 調査数 3 2 5 2 2 1 0 0 0 0 2 0 0 14 34 32 9 28 22 30 17 24 35 26 25 34 29 27 63 55 19 28 16 22 25 22 43 42 31 35 25 12 17 14 2 12 4 6 5 9 12 14 11 7 11 31 37 41 10 30 17 20 16 20 23 23 18 16 17 4 9 13 2 8 3 5 8 5 9 9 7 8 7 Not enough data Not enough data Not enough data

■ How did the COD change？ → COD in “spring-early summer(1st,3rd,5th,7th,9th,11th,13th stage)” is mostly higher than in “autumn-early winter(2nd,4th,6th,8th,10th,12th,14th stage)”. COD between Sanage Brdg. and Matsushige Brdg. was lower than between Matsushige Brdg. and Minatoshin Brdg.. 46 Note) The values over 20mg/L are treated as 20mg/L. 1st/3rd/5th stage ：TRWKR Change of COD : spring‐early summer 7th/9th/11th/13th stage：No TRWKR no rain on the day and the previous day （Average : Oseko Bridge - Sanage Bridge） 20 TRWKR Advanced water treatment, Meijo wastewater treatment plant 18 Horikawa Ugan Rain-water Reservior

16 Reclaimed waste water from Moriyama wastewater treatment plant 14 Improved and kept it during TRWKR period 14 No remarkable change 12 12 11 11 11 11 11

COD(mg/L) 8

0 Apr22H19.4.22～6.30-Jun30, 2007 Apr1H20.4.1～6.30-Jun30, 2008 Apr1H21.4.1～6.30-Jun30, 2009 Apr1H22.4.1～6.30-Jun30, 2010 Apr1H23.4.1～6.30-Jun30, 2011 Apr1H24.4.1～6.30-Jun30, 2012 Apr1H25.4.1～6.30-Jun30,2013 1st stage 3rd stage 5th stage 7th stage 9th stage 11th stage 13th stage 第1ステージ第3ステージ第5ステージ第7ステージ第9ステージ第11ステージ第13ステージ * Over 20mg/L recognize 20mg/L * Except from Minatoshin Bridge to Oseko Bridge, and from Sanage Bridge to Sakae Bridge because of few data

■ How did COD change from spring to early summer? → COD improved during TRWKR period but no remarkable change were seen after that. 47 2nd/4th/6th stage ：TRWKR Change of COD : autumn‐early winter 8th/10th/12th/14th stage：No TRWKR no rain on the day and the previous day （Average : Oseko Bridge - Sanage Bridge） 20 TRWKR Advanced water treatment, Meijo wastewater treatment plant 18 Horikawa Ugan Rain-water Reservior 16 Reclaimed waste water from Moriyama wastewater treatment plant

14 Worsened after TRWKR

Improved and kept it during TRWKR period 12 improve, keep 12 11 10 10 10 10 9 9

COD(mg/L) 8

0 Sep8H19.9.8～12.16-Dec16, 2007 Sep28H20.9.28～12.16-Dec16, 2008 Sep27H21.9.27～12.16-Dec16, 2009 Sep11H22.9.11～12.17-Dec17, 2010 Sep11H23.9.11～12.16-Dec16, 2011 Sep22H24.9.22～12.16-Dec16, 2012 Sep29H25.9.29～12.17-Dec17,2013 nd th th th th th th 2第2ステージ stage 第4ステージ4 stage 第6ステージ 6 stage 第8ステージ 8 stage 第10ステージ10 stage 第12ステージ12 stage 第14ステージ 14 stage * Over 20mg/L recognize 20mg/L * Except from Minatoshin Bridge to Oseko Bridge, and from Sanage Bridge to Sakae Bridge because of few data

。 ■ How does COD change from autumn to early winter? → COD improved and kept it during TRWKR, but become worse after TRWKR. Owing to water quality improvement measures, COD improved and kept its quality again. 48 1st/3rd/5th stage ：TRWKR Change of COD : spring‐early summer 7th/9th/11th/13th stage：No TRWKR no rain on the day and the previous day

20 大瀬子橋～松重橋Oseko-Matsushige 松重橋～朝日橋Matsushige-Asahi 朝日橋～城北橋Asahi-Johoku 城北橋～猿投橋Johoku-Sanage 18 TRWKR Advanced water treatment, Meijo wastewater treatment plant

16 Horikawa Ugan Rain-water Reservior 15 15 No remarkable change after finishing TRWKR 14 14 Reclaimed waste water from Moriyama wastewater treatment plant 14 13 13 13 13 12 12 12 12 12 12 11 11 11 11 11 10 10 10 10 9 9 9 9 9 8 8

COD(mg/L) 8

0 H19.4.22～6.30 H20.4.1～6.30 H21.4.1～6.30 H22.4.1～6.30 H23.4.1～6.30 H24.4.1～6.30 H25.4.1～6.30 Apr22-Jun30, 2007 Apr1-Jun30, 2008 Apr1-Jun30, 2009 Apr1-Jun30, 2010 Apr1-Jun30, 2011 Apr1-Jun30, 2012 Apr1-Jun30,2013 第1ステージ1st stage 第3ステージ3rd stage 第5ステージ5th stage 第7ステージ 7th stage 第9ステージ 9th stage 第11ステージ11th stage 第13ステージ13th stage

* Over 20mg/L recognize 20mg/L

49 1st/3rd/5th stage ：TRWKR Change of COD : spring-early summer 7th/9th/11th/13th stage：No TRWKR no rain on the day and the previous day

20 20 大瀬子橋～松重橋朝日橋～城北橋 18 Oseko-Matsushige 18 Asahi-Johoku

16 16 15 Improved and kept it

14 14 Improve or keep Improved and kept it worsened 12 12 12 11 12 11 11 10 10 10 9 9 9 10 9

8 8 COD(mg/L) COD(mg/L) 8 8

6 6

4 4

2 2

0 0 H19.4.22～6.30 H20.4.1～6.30 H21.4.1～6.30 H22.4.1～6.30 H23.4.1～6.30 H24.4.1～6.30 H25.4.1～6.30 H19.4.22～6.30 H20.4.1～6.30 H21.4.1～6.30 H22.4.1～6.30 H23.4.1～6.30 H24.4.1～6.30 H25.4.1～6.30 第1ステージ1st 第3ステージ3rd 第5ステージ5th 第7ステージ7th 第9ステージ 9th 第11ステージ11th 第13ステージ13th 第1ステージ1st 第3ステージ3rd 第5ステージ5th 第7ステージ7th 第9ステージ9th 第11ステージ11th 13th第13ステージ

20 20 Matsushige松重橋～朝日橋-Asahi 城北橋～猿投橋 18 18 Johoku-Sanage Improved and kept it 16 15 16 14 14 Improved and kept it 14 13 13 13 14 13 12 12 12 12 12 11 11 10

10 10 9 COD(mg/L) COD(mg/L) 8 8

6 6

4 4

2 2

0 0 H19.4.22～6.30 H20.4.1～6.30 H21.4.1～6.30 H22.4.1～6.30 H23.4.1～6.30 H24.4.1～6.30 H25.4.1～6.30 H19.4.22～6.30 H20.4.1～6.30 H21.4.1～6.30 H22.4.1～6.30 H23.4.1～6.30 H24.4.1～6.30 H25.4.1～6.30 第1ステージ1st 第3ステージ3rd 第5ステージ5th 7th第7ステージ第9ステージ9th 第11ステージ11th 13th第13ステージ 1st第1ステージ 3rd第3ステージ 5th第5ステージ 7th第7ステージ第9ステージ9th 11th第11ステージ 13th第13ステージ

50 2nd/4th/6th stage ：TRWKR Change of COD : autumn-early winter 8th/10th/12th/14th stage：No TRWKR no rain on the day and the previous day

20 大瀬子橋～松重橋Oseko-Matsushige 松重橋～朝日橋Matsushige-Asahi 朝日橋～城北橋Asahi-Johoku 城北橋～猿投橋Johoku-Sanage 18 TRWKR Advanced water treatment, Meijo wastewater treatment plant 16 Horikawa Ugan Rain-water Reservior

14 Reclaimed waste water from Moriyama wastewater treatment plant 13 13 13 12 12 12 12 11 11 11 11 11 11 10 10 10 10 10 10 9 9 9 9 9 9 8

COD(mg/L) 8 7 7 7 6 6

0 Sep8H19.9.8～12.16-Dec16, 2007 Sep28H20.9.28～12.16-Dec16, 2008 Sep27H21.9.27～12.16-Dec16, 2009 Sep11H22.9.11～12.17-Dec17, 2010 Sep11H23.9.11～12.16-Dec16, 2011 Sep22H24.9.22～12.16-Dec16, 2012 Sep29H25.9.29～12.17-Dec17,2013 2nd stage 4th stage 6th stage 8th stage 10th stage 12th stage 14th stage 第2ステージ第4ステージ第6ステージ第8ステージ第10ステージ第12ステージ第14ステージ

* Over 20mg/L recognize 20mg/L

51 2nd/4th/6th stage ：TRWKR Change of COD : autumn-early winter 8th/10th/12th/14th stage：No TRWKR no rain on the day and the previous day

20 20 Oseko大瀬子橋～松重橋-Matsushige Asahi朝日橋～城北橋-Johoku 18 18

16 16 Improved and kept it worsened 14 14 13 Improved and kept it 12 12 12 12 10 worsened 10 10 10 10 9 10 9

8 COD(mg/L) COD(mg/L) 8 7 7 7 8 6 6 6

4 4

2 2

0 0 H19.9.8～12.16 H20.9.28～12.16 H21.9.27～12.16 H22.9.11～12.17 H23.9.11～12.16 H24.9.22～12.16 H25.9.29～12.17 H19.9.8～12.16 H20.9.28～12.16 H21.9.27～12.16 H22.9.11～12.17 H23.9.11～12.16 H24.9.22～12.16 H25.9.29～12.17 第2ステージ2nd 第4ステージ 4th 第6ステージ 6th 第8ステージ 8th 第10ステージ10th 第12ステージ 12th 第14ステージ 14th 第2ステージ2nd 第4ステージ4th 第6ステージ6th 第8ステージ8th 第10ステージ10th 第12ステージ 12th 第14ステージ 14th

20 20 Matsushige松重橋～朝日橋-Asahi Johoku城北橋～猿投橋-Sanage 18 18

16 16 Improved and kept it Improved and kept it 14 worsened 13 14 13 worsened 12 12 11 11 11 11 11 12 11 10

10 10 9 9 9 9 COD(mg/L) COD(mg/L) 8 8

6 6

4 4

2 2

0 0 H19.9.8～12.16 H20.9.28～12.16 H21.9.27～12.16 H22.9.11～12.17 H23.9.11～12.16 H24.9.22～12.16 H25.9.29～12.17 H19.9.8～12.16 H20.9.28～12.16 H21.9.27～12.16 H22.9.11～12.17 H23.9.11～12.16 H24.9.22～12.16 H25.9.29～12.17 第2ステージ2nd 第4ステージ4th 第6ステージ6th 第8ステージ8th 第10ステージ10th 第12ステージ 12th 第14ステージ 14th 2nd第2ステージ第4ステージ4th 第6ステージ6th 第8ステージ8th 10th第10ステージ第12ステージ12th 第14ステージ14th

52 ４． Bubbles Upstream section Sanage Bridge・water fall Bubbles seem to be created by There are many bubbles detergent and the viscous material of Kurokawa sluice・water fall microbe and fallen leaves.

Middle and downstream section Sanage Bridge・water fall Bubbles seem to be created by detergent and the viscous material of There are few bubbles microbe and fallen leaves and hydrogen sulfide or methane gasses from sludge.

Around Nishiki Bridge Sludge floated to the surface with bubbles from the river bed Around Nishiki Bridge Many bubbles floated to the surface with bubbles from the river bed

Photos: secretariat 57 1st-6th stage ： With TRWKR No rain on the day and the previous day Occurrence of Bubbles 7th-14th stage： No TRWKR No rain on the day and the previous day

With TRWKR Introduction of advanced water treatment at Meijo water treatment Center

In service of Horikawa Ugan Rain-water Reservoir for pollution control Utilization of reclaimed wastewater of Moriyama water treatment Center Bubbles rising from the bottom of the river Bubbles flowed from upstream Sakae Bridge - Sanage Bridge With TRWKR Bubbles flowed from downstream Bubbles were not seen 100% 90% 80% 47 50 70% 67 67 73 74 Not enough data 60% 87 86 50% 100 100 100 100 100 100 20 40% 30% 8 50 20% 13 24 33 33 10% 25 13 13 14 Occurrence of of bubbles_component ratioOccurrence 3 0% 1st stage 2nd stage 3rd stage 4th stage 5th stage 6th stage 7th stage 8th stage 9th stage 10th stage 11th stage 12th stage 13th stage 14th stage Number of data 24 38 15 2 8 3 5 8 5 9 9 7 7 7

Bubbles rising from the bottom of the river Bubbles flowed from upstream Sanage Bridge -Minatoshin Bridge With TRWKR Bubbles flowed from downstream Bubbles were not seen 100% 90% Decreasing of occurrence of bubbles 80% Decreasing of occurrence of bubbles 70% 55 59 64 68 63 65 60% 80 80 75 80 94 89 89 Increasing 89 50% Increasing after Decreasing the stop of TRWKR 12th,13th 40% 12 1 9 14th 5 9 30% 5 5 11 1 6 20% 2 2 7 33 2 4 31 26 26 16 20 22 24 10% 14 17 2 3 3 5 2 2 8 8 5 Occurrence of bubbles_component of ratiobubbles_component Occurrence 0% 1 1st stage 2nd stage 3rd stage 4th stage 5th stage 6th stage 7th stage 8th stage 9th stage 10th stage 11th stage 12th stage 13th stage 14th stage Number of data 108 208 172 49 99 60 81 63 70 108 102 93 87 85 58 1st - 6th stage : With TRWKR No rain on the day and the previous day Occurrence of Bubbles 7th - 14th stage : NO TRWKR (Sanage Bridge - Minatoshin Bridge) No rain on the day and the previous day

With TRWKR With TRWKR

Not Enough data Not Enough data The ratio of the bubbles rising Decreasing from the bottom of the river was 0% in 6th and 14th stage

With TRWKR With TRWKR

Not Enough data Not Enough data

No data No data

With TRWKR The ratio of the bubbles rising from the bottom of the river Bubbles rising from the bottom of the river were was 0% in 6th and 14th stage observed frequently between Aasahi bridge and Matsushige bridge. But the ratio of the bubbles rising from the bottom of the river decreased. Especially, the ratio was 0% at 14th stage between Asahi Bridge and Oseko Bridge. It is the same phenomenon at 6th stage, three years after TRWKR started. It is seems that the sludge of the bottom of the river was good condition. Bubbles rising from the bottom of the river were observed frequently between Aasahi bridge and Matsushige bridge. But the ratio of the bubbles 59 rising from the bottom of the river was 0% in 6th and 14th stage. Difference of “bubbles flowed from the bottom of the river” from upstream to downstream・・・All stage

All data of 1st ～14th stage

Asahi Bridge Nishiki Bridge Kitashimizu Bridge

Habashita Bridge Kitashimizu Waterfront Park

Naya Bridge

＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊

＊：10 or less times of investigation Occurrence of bubbles component ratio(%) ＝Days when bubbles flow from the bottom of the river／All investigation Days ×100

There were many “bubbles flowed from the bottom of the river” near Kitashimizu Bridge, Habashita Bridge, Nishiki Bridge, and Naya Bridge in “Spring ～ Early Summer” season. 60 Occurrence of Bubbles (“Autumn ～ Early Winter” season. …10th,12nd,14th stage)

Sanage Bridge ～Johoku Bridge Johoku Bridge ～Asahi Bridge Asahi Bridge ～Matsushige Bridge 2011_10th stage 2011_10th stage 2011_10th stage

Not seen Not seen Not seen

From downstream From downstream From downstream From up stream From up stream From up stream From bottom of From bottom of From bottom of the river the river the river

9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1

2012_12th stage 2012_12th stage 2012_12th stage

Not seen Not seen Not seen From downstream From downstream From downstream From up stream From up stream From up stream From bottom of From bottom of From bottom of the river the river the river

9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1

2013_14th stage 2013_14th stage 2013_14th stage

Not seen Not seen Not seen From downstream From downstream From downstream From up stream From up stream From up stream From bottom of From bottom of From bottom of the river “O” from bottom of the river “O” from bottom of the river the river the river

9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1

The number of “Bubbles from the bottom of the water” at 14th stage was few. Johoku bridge～Matsushige bridge was 0. 61 The quality improvement of water and sludge of the river bed of Horikawa River After the stop of TRWKR(7th stage) Before TRWKR～6th stage ～14th stage Bubbles from river bed Bubbles from river bed Sludge rolled up Sludge rolled up After the stop of tide tide TRWKR Before TRWKR The sludge (7th stage) accumulated again

8th～13th stage Bubbles from river bed Bubbles from river bed New measures for Sludge rolled up water quality improvement Sludge rolled up 6th stage The water quality was tide tide improved The quality improvement of The quality improvement of sludge of the river bed TRWKR：0.4m3/s sludge of the river bed The bubbles from river bed and For 3 years The bubbles from river bed and sludge roll up decreased sludge roll up decreased

Bubbles from river bed 14th stage th Sludge rolled up 14 stage The record heavy tide The quality improvement of water and rainfall on Sep. 4th sludge of the river bed of Horikawa River washed away the (Bubbles, smell, transparency has improved) outer layer of the The quality improvement of We think that the quality of water and sludge of the river sludge of riverbed. sludge of the river bed bed of Horikawa River improved because of the record The bubbles from river bed and heavy rainfall on Sep. 4th and new measures for water sludge roll up decreased quality improvement at 14th stage. 62 1st-6th stage : With TRWKR 5. Smell No rain on the day and the previous day 7th -14th stage : No TRWKR Occurrence of smell No rain on the day and the previous day

With TRWKR Introduction of advanced water treatment at the Meijo Water Treatment Center In-service of Horikawa Rain-water Reservoir on the Right Bank Utilization of Reclaimed wastewater of Moriyama Water Treatment Center SakaeBridge-SanageBridge TRWKR Terrible smell Bad smell Smell Slight smell No smell 100%

90%

80% Not enough data 50 ■ Change of smell 70% 60 The percentage of ”Terrible smell” – 75 74 60% 78 80 78 78 87 “Smell” had been higher in Spring - 94 50% 100 100 100 100 Early summer than Autumn – Early

40% winter and had been reduced during TRWKR. 30% 50 The percentage of “Terrible smell” 20% 40 13 increased in the 7th stage, just after 13 13 25 10% 22 22 TRWKR. But smell had been better Occurrence of smell, smell, Component ratio of Occurrence 13 13 9 3 7 th 0% 3 after the 7 stage. It is assumed that Stage 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th the new measures for water quality Numbers of data 23 40 15 2 8 3 5 8 5 9 9 8 8 7 improvement are effective. SanageBridge-MinatoshinBridge Terrible smell Bad smell Smell Slight smell No smell TRWKR Smell had got worse between the 100% 12th and 13th stage. It’s probably 90% 24 because the temperature had been 31 39 37 higher than average year and the 80% 42 44 48 50 56 sludge on the bottom of Horikawa had 70% 61 57 60 57 Increase(worsen)68 been in bad condition in those stages. 60% 34 Increase(Worsen) In the 14th stage smell got better. after TRWKR th th 33 50% 12 ,,,13 Terrible28 smell – Smell reduce Particularly “Terrible smell” was 0%, 30 36 Reduce(improve) 40% 28 20Reduce(improve) which is the same value as the 6th (improve) th 37 20 14 stage (the third year of TRWKR). It is 30% 31 27 15 30 15 27 10 31 15 assumed that the sludge on the 20% 11 24 15 11 11 bottom was in good condition. 8 11 7 8 10% 12 6 9 7 12 9 Occurrence of smell, smell, Component ratio of Occurrence 5 11 4 6 5 2 7 8 9 4 4 10 0% 3 3 4 4 2 3 4 Stage 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th Numbers of data 109 212 176 52 111 63 84 67 75 113 110 98 93 82 63 1st-6th stage : With TRWKR Occurrence of smell No rain on the day and the previous day (Between Sanage Bridge and Minatoshin Bridge) 7th -14th stage : No TRWKR No rain on the day and the previous day

SanageBridge-JohokuBridgeWith TRWKR MatsushigeBridge-OsekoBridge With TRWKR Terrible smell Bad smell Smell Slight smell No smell Terrible smell Bad smell Smell Slight smell No smell 100% 100% “Terrible smell” is 0% Not enough data Terrible smell” is 0% 29 31 33 29 80% th th 80% 43 in the 6th stage and 1439th stage 49 47 in the 6 stage and 1444 stage 53 59 52 65 61 65 63 64 61 62 65 68 75 70 17 70 60% 82 82 60% 80 78 23 29 42 18 23 20 40% 24 40% 17 38 39 23 10 15 9 37 23 29 7 24 21 19 17 20% 12 29 17 20 5 31 9 17 30 19 20% 15 11 3 32 13 31 5 9 8 15 13 5 9 15 4 5 13 18 3 21 19 Occurrence of smell, smell, Component ratio of Occurrence 17 17 Occurrence of smell, smell, Component ratio of Occurrence 10 2 10 9 10 6 8 6 5 4 8 5 6 9 9 11 4 10 10 11 3 0% 0% 7 4 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th Stage Stage 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th Numbers of data 33 47 42 11 30 17 24 16 20 23 25 20 16 17 Numbers of data 15 35 33 9 29 25 30 21 24 35 26 26 35 29 OsekoBridge-MinatoshinBridge Terrible smell Bad smell Smell Slight smell No smell JohokuBridge-AsahiBridge With TRWKR Terrible smell Bad smell Smell Slight smell No smell With TRWKR 100% 100% Not enough data 25 20 33 34 29 27 80% 42 38 40 Not enough data 50 50 80% 57 20 57 50 60% 25 75 67 Not enough data 37 60% 20 20 33 25 57 100 100 100 100 100 40% 43 46 33 40% 20 20 18 43 50 22 50 36 33 20% 5 17 8 25 50 No data No data Occurrence smell, of Component ratio 5 20 20 18 20% 8 11 7 8 14 33 0% 5 Stage 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th Occurrence smell, of Component ratio Numbers of data 12 21 14 2 13 4 5 5 9 12 14 12 7 11 0% Stage 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th Numbers of data 3 2 5 2 2 1 0 0 0 0 2 0 0 0 AsahiBridge-MatsushigeBridge With TRWKR Terrible smell Bad smell Smell Slight smell No smell 100% 8 12 24 20 33 ■Where are there many bubbles from the 80% 35 Terrible40 smell”36 is 0% 40 50 55 51 bottom of Horikawa? 49 th 61 th 75 in44 the 6 stage and 14 stage 60% 37 45 The percentage of “Terrible smell” – “Smell” 30 32 42 has been higher between Asahi Bridge and 40% 16 48 23 15 12 20 26 52 Oseko Bridge than in other sections. 46 14 17 13 6 30 But it reduced between Sanage Bridge and 20% 13 14 16 12 13 13 9 12 9 th 11 8 8 Oseko Bridge in the 14 stage, particularly Occurrence of smell, smell, Component ratio of Occurrence 11 6 4 4 11 12 4 9 7 2 2 9 8 0% 6 5 5 Stage 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th “Terrible smell” was 0%, which is the same Numbers of data 46 107 82 28 37 16 25 25 22 43 43 40 35 25 value as the 6th stage (the third year of Percentage of “Terrible smell” – “Smell” has been TRWKR). It is assumed that the sludge on the high between Asahi bridge and Oseko Bridge. bottom was in good condition. But it was 0% in the 6th stage and 14th stage. 64 Occurrence of smell Ｉn the10th, 12th and 14th stage (Autumn – Early winter) SanageBridge-JohokuBridge JohokuBridge-AsahiBridge AsahiBridge-MatsushigeBridge 10th stage in 2011 10th stage in 2011 10th stage in 2011 No smell No smell No smell Slight smell Slight smell Slight smell Smell Smell Smell Bad smell Bad smell Bad smell Terrible Smell No “Terrible smell”” No “Terrible smell”” Terrible Smell No “Terrible smell”” Terrible Smell

9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1

12th stage in 2012 12th stage in 2012 12th stage in 2012 No smell No smell No smell Slight smell Slight smell Slight smell Smell Smell Smell

Bad smell Bad smell Bad smell

Terrible Smell Terrible Smell Terrible Smell

9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1

14th stage in 2013 14th stage in 2013 14th stage in 2013 No smell No smell No smell Slight smell Slight smell Slight smell Smell Smell Smell

Bad smell Bad smell Bad smell Terrible Smell Terrible Smell No “Terrible smell”” No “Terrible smell”” Terrible Smell No “Terrible smell””

9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1

“Terrible smell” – “Smell” reduced in the 10th stage and 14th stage. 65 Reference : Relation between bubbles from the bottom of Horikawa and smell Data : 13th HSC meeting

66 Difference of smell at each Bridge over Horikawa ＝Number of days we observed “Terrible smell” – “Smell” Percentage of “Terrible smell”, “Bad smell” and “Smell” /Number of all days we surveyed × 100 (%) From 1st stage to 14th stage including the intervals between each stage No rain Both With TRWKR and No TRWKR 100 Nishiki Bridge Smell 90 Habashita Bridge Bad smell 80 Terrible smell

70 Kameya Bridge Naya Bridge Asahi Bridge 60 Areas where the percentage of “Terrible smell” – “Smell” is high Kitashimizu Bridge 50 in the midstream almost correspond with areas where bubbles from the bottom were seen. ratio(%) 40 Kitashimizu 30 Shinsui Hiroba

10 "Terrible smell""Bad smell""Smell", Component smell""Smell", smell""Bad "Terrible * * * * * * * * * * * * * * * * *

Oto

Iwai

Gojo

Hioki

Naya

Kinjo

Naka

Taiko

Asahi Asahi

Keiun Shiga

Goryo

Sanno

Sakae

Meoto

Kiraku

Ruriko

Oseko

Nishiki

Suzaki

Sujikai

Kizune

Takajo

Koshio

Hataya

Tabata

Sakura

Temma

Johoku

Sanage

Kameya

Horibata

Tsusakae

Kizaemon

Kurokawa

Habashita

Sumiyoshi

Tennozaki

Furuwatari

Name bridge

Shinsuzaki

Minatoshin

KurokawaN…

Kitashimizu

Matsushige Atsutakinen

* : under 10 data Chigonomiya Nakatsuchido

At Gojo Bridge Sludge is exposed Photo by Nagoya Institute of Technology At Oto Bridge, high tide River Survey Team Strong rotten eggs were observed 67 1st-6th stage : With TRWKR Kinds of smell No rain on the day and the previous day 7th -14th stage : No TRWKR Introduction of advanced water treatment at the Meijo Water Treatment Center With TRWKR No rain on the day and the previous day In-service of Horikawa Rain-water Reservoir on the Right Bank Utilization of Reclaimed wastewater of Moriyama Water Treatment Center SakaeBridge-SanageBridge ①Ditch ②Sludge ③Rotten Egg ④Pulp ⑤Sea ⑥Others 100% With TRWKR 90% 20 33 80% ■ Occurrence of smell 50 50 50 80% of smell is “ditch” and 70% 20 Not enough data “Sludge” between Sanage 60% Bridge and Minatoshin Bridge 50% 20 100 100 100 100 40% 67 30% 50 50 50

20% 40 Kinds of smell, Component ratio of smell, Kinds 10% No data

0% Stage 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th Numbers of data 0 5 3 1 2 0 2 1 0 2 2 0 1 0 SanageBridge-MinatoshinBridge ①Ditch ②Sludge ③Rotten Egg ④Pulp ⑤Sea ⑥Others 100% With TRWKR 4 5 1 5 9 6 8 7 6 14 3 15 4 10 2 13 90% 1 4 16 2 6 8 3 3 9 7 7 4 1 3 4 6 2 5 4 80% 5 30 8 0 16 5 24 70% 32 27 34 15 40 52 42 31 60% 37 34 50% 80% of smell is Smell of “ditch” and “sludge” 40% 65 65 30% 62 54 55 55 52 49 42 43 41 42 20% 36

Kinds of smell, Component ratio of smell, Kinds 10% No data 0% Stage 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 68 Numbers of data 0 111 111 20 75 20 63 29 44 52 49 50 68 36 Occurrence of each kind of smell from the 10th stage to 14th stage (Autumn – Early winter) SanageBridge^JohokuBridge JohokuBridge-AsahiBridge AsahiBridge-MatsushigeBridge 10th stage in 2011 10th stage in 2011 10th stage in 2011 No smell No smell No smell Others Others Others Sea Sea Sea Pulp Pulp Pulp Rotten egg Rotten egg Rotten egg Sludge Sludge Sludge Ditch Ditch Ditch

9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1

12th stage in 2012 12th stage in 2012 12th stage in 2012 No smell No smell No smell Others Others Others Sea Sea Sea Pulp Pulp Pulp Rotten egg Rotten egg Rotten egg Sludge Sludge Sludge Ditch Ditch Ditch

9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1

14th stage in 2013 14th stage in 2013 14th stage in 2013 No smell No smell No smell Others Others Others Sea Sea Sea Pulp Pulp Pulp Rotten egg Rotten egg Rotten egg Sludge Sludge Sludge Ditch Ditch Ditch

9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1 9/1 10/1 11/1 12/1 1/1

Smell of “ditch” reduced in 14th stage 69 Occurrence of each kind of smell Between Asahi Bridge and Matsushige Bridge from the 10th stage to 14th stage (Autumn – Early winter)

Asahi Bridge - Matsushige Bridge

10th stage in 2011

Ditch Sludge Rotten Egg Pulp Sea Others No smell

12% 12th stage in 2012 22% 56% Ditch Sludge Rotten Egg Pulp Sea Others No smell 5% 5%

23% 51% 14th stage in 2013 18%

Ditch Sludge Rotten Egg Pulp Sea Others No smell 5% 3%

40% 32% Smell of “ditch” reduced particularly between Asahi Bridge and Matsushige 8% Bridge in the 14th stage. 4% 8% 8% 70 ６． Colors There were reports, it smelled rotten egg(Hs) and fish suffered in case of light grey yellow green,

⑧Light gray ⑤Green ⑦Yellow gray Photos, taken at yellow green the Nishiki-bashi bridge

⑨Gray yellow green ⑩Gray green ⑪Dark gray

Colors change due to daylight

Sunny Cloudy st Red tide, July 1 , 2012 From the 2nd HR Chosatai meeting report 71 2nd to 6th ：TRWKR on, no rain on the day and previous day 7th to 14th :TRWKR off, Ratio of colors No rain on the day and previous day between the Sanage-bashi bridge and the Minato-shin-bashi bridge “Colors” was added to survey item from the 2nd stage.

① ⑥ ⑪ ② ⑦ ⑫ ③ ⑧ ⑬ ④ ⑨ ⑭

⑤ ⑩ ⑮

Frequent colors were ⑧Light grey yellow green, ⑨Grey yellow green, and ⑩Grey green. 72 2nd to 6th ：TRWKR on, no rain on the day and previous day 7th to 14th :TRWKR off, Colors when “Dirty” or “Slightly dirty” No rain on the day and previous day Ratio of main colors, between the Sanage-bashi bridge and the Minato-shin-bashi bridge

■ What Colors were seen when the impression about With TRWKR clearness was “slightly dirty” or “dirty”? Colors seen Introduction of frequently were ⑤ advanced treatment Green, ⑦Yellow gray, on the Majo waste ⑧Light gray yellow water treatment center green, ⑨gray yellow green, ⑩Gray green In service of Horikawa and ⑪Dark gray. Ugan Rain-water It smells of rotten egg Reservoir in case of ⑧Light For Pollution Control grey yellow green. Utilization of And water get blue reclaimed wastewater tide. of Moriyama water ⑪Dark grey shows treatment center risen sludge. The color was seen mainly from spring to early summer. However, it accounted 14% in 14th stage, carried out from autumn to early winter.

73 No rain on the day Colors when “Dirty” or “Slightly dirty” and previous day Ratio of colors between the Sanage-bashi bridge and the Minato-shin-bashi bridge Comparison among the 10th, 12th, and 14th

Light colors Light colors increased. decreased. Dark colors increased. ⑨Gray yellow green,⑪Dark gray increased.

From comparison between the 10th and 12th, dark colors such as ⑤Green, ⑩Gray green, ⑮Green brown decreased, and light colors such as ④Yellow green, ⑧Light gray yellow green, ⑬Yellow brown increased. On the 12th stage, high temperature continued to middle of October. Thus, it is considered that, bottom water of HR continued to be lack of oxygen, and tend to be milky(blue tide: increase of sulfur colloid).(12th HR Chosatai meeting report) On the 14th stage, light colors decreased and dark colors increased. It is considered that, it got high transparency of water and made observers show basin sludge colors(dark gray), then observers reported dark colors. 74 The reason why dark colors increased on the 14th stage

Observation of water colors 10th stage Upper Nagoya port Fresh water Rise of bottom sludge Salt water Observation of water colors It is considered that, there were double layer of water; high transparency surface and milky bottom water. Observers on bridge felt light white colors 12th stage from bottom layer through surface layer. Fresh water Rise of bottom sludge Salt water Milky On the 12th stage, high temperature continued to the middle of October. And bottom water(salt water) of HR had been lack of oxygen , then tended to be milky(blue tide: increase of sulfate colloid). Observation of water colors It is considered that, the transparency of water got high and observers saw bottom sludge(dark 14th stage gray) then felt dark colors. Fresh water Decrease of rise of bottom sludge Salt water Low milky

In the 14th stage, HR might to be low milky. Because there were short heavy rain such as on September 4th. And it flushed bottom sludge out. Then rise of sludge due to tide decreased, and bottom of HR didn’t get lack of oxygen. It caused decrease of blue tide. Also, there were few reports of bubbles from bottom, that shows bottom was oxygen-rich. 75 The transparency exceeded 1m between the Goryo-bashi Bridge and Sakura-bashi Bridge. Also, in November, it exceeded 2m on almost all points. Especially it exceeded 4m on Goryo-bashi Bridge.

Transparency measured by hand-made instrument October 14th and November 23rd Measuring points: 7 points between Sakura-bashi Bridge and Goryo-bashi Bridge 76 (Reference) Condition of the Nagoya port water Temperature, transparency

Water quality of Nagoya port M-1_ガーデンふ頭Garden pier 水温Surface表層 temp. 水温MiddleMiddleMiddle中層 temp. temp.temp. (M-1 garden pier) 35 From 2011 30

) ℃

( 20

水温 15 Temp. 10 10st 12st 14st

H26.1 H26.2 H26.3 H23.4 H23.5 H23.6 H23.7 H23.8 H23.9 H24.1 H24.2 H24.3 H24.4 H24.5 H24.6 H24.7 H24.8 H24.9 H25.1 H25.2 H25.3 H25.4 H25.5 H25.6 H25.7 H25.8 H25.9

H25.11 H25.12 H23.10 H23.11 H23.12 H24.10 H24.11 H24.12 H25.10

M-1_ガーデンふ頭Garden pier 透明度transparency M-1 Garden pier 5 14st 10st 12st 4.0

4 3.4

The transparency of (m) 3 2.52.4 2.4 th 2.2 2.2 2.2 Nagoya port(14 2.02.02.0 2.1 stage) was 1.5m in 透明度 2 1.5 October and 2.2m in 1.4 1.5 1.21.3 1.2 November. 1.1 1.0 1.1 0.80.9 0.8 0.9 1 0.7 0.6 0.7 0.7 0.6

Transparency. 0.4 0.4 Quotation from Nagoya City HP http://www.city.nagoya.jp/jigyou 0 /category/38-3-6-5-63-0-

0-0-0-0.html

H23.4 H23.6 H23.8 H24.2 H24.3 H24.5 H24.7 H24.9 H25.1 H25.2 H25.4 H25.6 H25.8 H26.1 H26.3 H23.5 H23.7 H23.9 H24.1 H24.4 H24.6 H24.8 H25.3 H25.5 H25.7 H25.9 H26.2

H23.10 H23.12 H24.11 H25.10 H25.12 H23.11 H24.10 H24.12 H25.11 77 (Reference) Condition of the Nagoya port water Transparency, DO(dissolved oxygen)

Middle M-1_ガーデンふ頭Garden pier 透視度Surface表層透視度中層 transparency transparency Over100 ｃｍ以上100cm 100

(cm)

60 透視度 40 10st 12st 14st

20 Transparency Transparency

H23.4 H23.7 H23.8 H24.2 H24.3 H24.6 H24.7 H25.1 H25.2 H25.5 H25.6 H25.8 H25.9 H26.1 H23.5 H23.6 H23.9 H24.1 H24.4 H24.5 H24.8 H24.9 H25.3 H25.4 H25.7 H26.2 H26.3

H23.11 H24.10 H25.12 H23.10 H23.12 H24.11 H24.12 H25.10 H25.11

Surface Middle M-1_ガーデンふ頭 DO 表層 DO 中層 Garden pier DO DO 25 10st 12st 14st 20

15 (mg/L)

ＤＯ 10

Quotation from Nagoya City HP 0 http://www.city.nagoya.jp/jigyou

/category/38-3-6-5-63-0-

H23.4 H25.4 H25.5 H25.6 H25.7 H25.8 H25.9 H26.1 H26.2 H26.3 H23.5 H23.6 H23.7 H23.8 H23.9 H24.1 H24.2 H24.3 H24.4 H24.5 H24.6 H24.7 H24.8 H24.9 H25.1 H25.2 H25.3

H25.10 H25.11 H25.12 H23.11 H23.12 H24.10 H24.11 H24.12 0-0-0-0.html H23.10 78 From 2nd to 6th stage : With TRWKR No rain on the day and the previous day Frequency of finding Litters ７．Litters From 7th to 14th stage : No TRWKR No rain on the day and the previous day nd th （From ２～14 stage，all section） ■Litters component：Plastic wastes(PE、PP、 form bowl、foam tray,PET ,etc.),can,glass,cigarette (wrapping,butt)

28 Litters : in decreasing trend 26 26.0 「レジ袋1.8」とは 3rd 24 ２nd 10回調査に行くと「レジ袋」が1.8回（１00回 5th 4th 22 調査に行くと18回）落ちていたということを示しています。 6th 7th 20 8th 9th

18 10th 11th surveys ) surveys

16 12th 13th 10

14 14th / Frequency of finding litters (/10 surveys)

12 “PE shopping bag 1.8”means that PE shopping =number of surveys in which litters was found /number of surveys ×10 ( bag was found路上ごみは減少傾向 1.8 times in 10 investigations.

10 8.9 (or 18 times in100 investigations) ＊Frequency of finding litters is not same as the number of litters. 8 If Litter is found one or more times in each survey ,it counts just one. 6 3.6 3.3

4 2.4 1.5 2.5 2.2

Frquency 2.0 0.4 1.5 1.8 1.8 1.1 1.0 0.5 1.0 0.5 1.8 2 0.7 0.7 0.4 0.4 0.7 0.7 0.6 0.7 0.2 0.1 0.0 0.3 0.0 0.1 0.4 0.0 0.0

0.1 0.0

bag

can

Total

PP bag PP

Form bowl Form Paper bag Paper

18項目のごみの確認 Newspqper

Form tray Form Magazinne

頻度をステージごとに bottle PET

Other papers Other

Paper carton Paper

Glass bottle Glass

PE PE shopping shopping bag shopping

単純集計 PE in Litters 注）確認頻度(回/調査10回あたり) ＝確認回数／調査回数×10 butt Cigarette

Litterrs in city in Litterrs ＊確認頻度は、ごみの数ではありません。各調査で人工ごみ

desingnated gabage desingnated Ciggarette wrapping Ciggarette

Other plastic debris plastic Other を確認したら種類ごとに１回と数えました。 Other plastic wrapping plastic Other

■What trend was frequency of litters? Frequency of litters was in decreasing trend . Change of social environment, such as more active cleaning, charging of shopping bag fee, may influence this trend. The most frequent littered item was cigarette butt. 79 From 2nd to 6th stage : With TRWKR ■ Litters component： Litters on Riverside Ways No rain on the day and the previous day Plastic wastes(PE, PP, nd th From ７th to 14th stage : No TRWKR form bowl, foam tray, （From ２～14 stage，all section） No rain on the day and the previous day PET, etc.), can, glass, cigarette(wrapping, butt) plastics can bottle paper ２ cigarette

１st Plastics : in decreasing trend (No survey) プラスチック系は減少の傾向２nd 42% 10% 6% 22% 20% (255) ３rd 40% 8% 21% 30% ( 191) 1% 4th 43% 9% 19% 28% ( 54) 1% ５th 37% 7% 2% 27% 27% ( 119) ６th 32% 9% 3% 20% 36% ( 66) ７th 27% 7% 2% 16% 48% ( 90) ８th 24% 7% 15% 53% ( 75) 1%

With TRWKR With TRWKR ９th 34% 8% 2% 18% 38% ( 81) １０th 33% 8% 2% 24% 33% ( 122) １１th 30% 10% 5% 18% 37% ( 122) １２th 30% 7% 3% 18% 42% ( 106) １３th 33% 6% 4% 14% 43% ( 101) 1% １４th 29% 8% 19% 43% ( 89) 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% ( )Number of survey 注）Component ratio(%)＝the number of sighting each kind of litter／the number of sighting all kind of litter ×１００ Litter does not include leaves, branches and grass. ＊The number of sighting is not the number of litters. We count one, even if at least one litter is sighted in the survey. ■What kind of litters on the riverside ways was sighted requently? The rate of plastics and cigarette are high. The rate of plastics is decreasing. 80 From 2nd to 6th stage : With TRWKR From ７ｔｈ to 14th stage : No TRWKR No rain on the day and the previous day No rain on the day and the previous day

Change in Floating Litters ■ Litters component： Plastic wastes(PE, PP, form bowl, foam tray, PET, etc） , can, glass, cigarette(wrapping, butt)

5 各系の調査1回あたり ( Data number of survey ) のごみの数をステージ nd The sum of each stage, the １st(145) ２ (255) ごとに単純集計number of litters per one survey All section ３ rd(191) ４th (54) 4 th th ５ (119) ６ (66) ７ th(90) ８th (75) 3.0 プラスチック系が多いRate of plastics is high ９ｔh（８１） 10 th(１２２) 3 11th(１２２) 12t H(１０６) 2.2 13th(101) 14 th(89) 2.2 2 1.5

1 0.2 0.4 0.1 0.3 0.4 0.1 Number of litters per one survey one per litters of Number 0 0 0 total plastic can bottle paper cigarette Kind of litters Note: the number of litters per one survey = the number of each litters found in all surveys/the number of surveys ＊the number of litters is the number of litters found through all surveys “If some kind of litters was found “countless (=***)”in some survey, it counts “10”, the maximum number in one survey substituted for the number of “countless”

■What trend the floating litters goes? →The litters on the riverside ways are decreasing. But the floating litters are not decreasing. Cleanup Vessel run regularly, but the floating litters might come and go with the high and low in Horikawa River for many hours. The rate of plastics is high. 81 From 2nd to 6th stage : With TRWKR Change of the number of Floating Litters No rain on the day and the previous day From ７ｔｈ to 14th stage : No TRWKR No rain on the day and the previous day

調査回数 8 ( )Number of survey ( )Number of survey 調査回数

第１ステージ：32 第11ステージ：9 7 第１ステージ：46 第11ステージ：43 第2ステージ：42 第12ステージ：8 7 １ｓｔ(46) ２ｎｄ(107) Sakae Ｂｒidge ～ Sanage Bridge １ｓｔ(32) ２nd(42) 第2ステージ：107 第12ステージ：40 第3ステージ：15 第13ステージ：8 Asahi Bridge～Matsushige Bridge ３ｒｇ(82) ４ｔｈ(28) 6 第3ステージ：82 第13ステージ：35 第4ステージ：2 第14ステージ：7 ３ｒｄ(15) ４th(2) 6 ５ｔｈ(37) ６ｔｈ(16) 第14ステージ：25 ５th(8) ６th(3) 第4ステージ：28 5 第5ステージ：8 5 第5ステージ：37 ７ｔｈ(25) ８ｔｈ(25) 第6ステージ：3 データ数が少ない７th(5) ８th(8) 第6ステージ：16 ９ｔｈ(22) 10ｔｈ(43) 4 第7ステージ：5 th ９th(5) 10 (9) 4 第７ステージ：25 11ｔｈ(43) 12ｔｈ(40) 第8ステージ：8 11th(9) 12th(8) 2.3 第8ステージ：25 13ｔｈ(35) 14ｔｈ(26) 3 第9ステージ：5 3 2.6 13th(8) 14th(7) 1.8 第9ステージ：22 per survey per 第10ステージ：9 1.7 1.1 1.6 第10ステージ：43 0.8 2 survey per 2 1.2 0.2 0.8 1.3 1.0 0.3 0.2 0.5 0.3 0.4 0.9 0.3 0.3 1.2 0.8 1.0 0.4 0.2 0.1 0.4 0.3 0.5 0.7 0.5 0.5 0.2 0.1 0.1 0.3 0.20.3 0.6 0.4 1 0.3 0.3 0.5 0.1 0.2 0.1 0.2 0.3 0.1 0.3 1 0.4 0.5 0.1 0.1 0.1 0.30.3 0.1 0.10.1 0.1 0.1 0.1 0.1 0.10.2 0 0 0 0 0 0 0 0 0.0 0.1 0.1 0 0 0.1 0 0 0 0 0 0 0 00 0 0 00 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0.1 0 0 0.1 0 0 0

Number Number floating of litters 0 0 Number Number floating of litters Plastic Can Bottle Paper Cigarette Plastic Can Bottle Paper Cigarette Kind of litters Kind of litters

8 ( )Number of survey 調査回数 8 ( )Number of survey

調査回数第１ステージ：37 第11ステージ：27 １ｓｔ(37) ２nd(47) 7.0 7 第１ステージ：15 第11ステージ：27 １st(15) ２nd(36) 第2ステージ：47 第１2ステージ：20 ３ｒｇ(42) ４ｔｈ(11) 7 Ｓｎａｇｅ Bridge ～Ｊｏｈｏｋｕ Bridge 6.2 Matsushige Bridge ～ Oseko第2ステージ： Bridge36 第12 ステージ：26 3rg(33) ４th(9) 第3ステージ：42 第13ステージ：16 6 ５ｔｈ(30) ６ｔｈ(17) 第3ステージ：33 第13ステージ：35 5th(29) ６th(25) 第4ステージ：11 第14ステージ：17 6 ７ｔｈ(24) ８ｔｈ(16) 第4ステージ：9 第14ステージ：29 ７th(30) ８th(21) 4.8 増加第5ステージ：30 減少 5 4.6 ９ｔｈ(20) 10ｔｈ(23) 5 第5ステージ：29 th 第6ステージ：17 ９th(25) 10 (35) 3.5 第6ステージ：25 th th 3.8 第７ステージ：24 11ｔｈ(27) 12ｔｈ(20) 11 (27) 12 (26) 4 傾向 4 3.0 3.4 3.4 傾向第７ステージ：30 3.1 第8ステージ：16 13ｔｈ(16) 14ｔｈ(17) 2.9 13th(35) 14th(29) 第8ステージ：21 3 2.6 2.5 第9ステージ：20 2.6 2.6 2.5 3 2.5 2.0 第9ステージ：25

2.2 第10ステージ：23 1.6 2.2 per survey per

per survey per 1.7 0.6 0.8 1.5 第10ステージ：35 2 1.4 1.8 2 1.3 1.6 1.1 1.3 0.4 0.5 0.4 0.5 1.3 1.4 1.4 0.9 1.0 0.7 0.4 0.4 1.1 0.3 0.2 0.7 0.8 0.7 0.4 0.3 0.4 0.9 0.2 0.2 0.1 0.8 1 0.6 0.3 0.3 0.4 0.3 0.3 0.2 0.3 1 0.1 0.1 0.1 0.1 0.7 0.2 0.6 0.2 0.4 0.2 0.1 0.2 0.2 0.1 0.2 0.2 0.1 0.5 0.1 0.3 0.2 0.1 0.4 0.1 0.1 0.2 0.10.1 0.10.1 0.1 0 00 0 0 0 0 0.1 0.1 0.1 0.2 0.1

0 0 00 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.1 0.1 00 Number Number floating of litters Number Number floating of litters 0 0 Plastic Can Bottle Paper Cigarette Plastic Can Bottle Paper Cigarette Kind of litters Kind of litters

( )Number of survey

8 調査回数 ( )Number of survey 8 調査回数

第１ステージ：12 第11ステージ：14 7 7 第１ステージ：3 第8ステージ：0 １st(3) ２nd(2) 第2ステージ：21 第12ステージ：12 １ｓｔ(12) ２nd(21) Oseko Bridge～Minatoshin Bridge 第2ステージ： 2 第9ステージ：0 Johoku Bridge. ～ Asahi Bridge 第3ステージ： 14 第13ステージ：7 ３rd(14) ３rd(5) ４th(2) 6 ４th(14) 6 第3ステージ：5 第10ステージ：0 th 第14ステージ：11 ５th(2) 6 (1) データ数が少ない第4ステージ：2 ５th(13) ６th(4) 5.0 データ数が少ない第4ステージ：2 第11ステージ：0 ７th(0) ８th(0 5 第5ステージ：13 ７th(6) ８th(5) 5 第5ステージ：2 第12ステージ：2 th 第6ステージ：4 ９th(9) 10th(12) 第6ステージ：1 第13ステージ：0 ９th(0) 10 (0) 4 3.7 th th 4 第７ステージ：6 11t(14) 12th(12) 第7ステージ：0 第14ステージ：0 11 (0) 12 (2) 3.0 第8ステージ：5 th th 13th(7) 14th(11) 13 (0) 14 (0) 3 第9ステージ：9 3 2.0 2.0 2.0

2.0 第10ステージ：12 1.7 per survey per per survey per 2 1.5 2 1.1 0.5 1.0 0.5 0.4 0.2 0.1 0.1 0.2 0.4 1 0.2 0.5 1 0.2 0.3 0.2 0.3 0.1 0.4 0.4 0.10.1 0.3 0.1 0.2 0 0 00 0 00 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 00 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 Number Number floating of litters Number Number floating of litters Plastic Can Bottle Cigarette Plastic Can Bottle Paper Cigarette Paper Kind of litters Kind of litters

■ In which section did a lot of litters float？ → In “Sanage Bridge ～Johoku Bridge” section and “Matsushige Bridge ～Oseko Bridge” section. 82 Change in Floating Litters along the Horikawa River The 1st-14thｓｔage: including term out of survey stage and after the stop TRWKR ,No rain

9 There are a lot of litters between There are a lot of litters around 8 Matsushige Bridge and Oseko Bridge Johoku Bridge Around Matsushige Pumping 7 Station 6

Number of floating litters per survey per litters floating of Number 1

Oto

Iwai

Naya

Goyo

Keiun

Hioki

Asahi

Shiga

KIraku

suzaki

Kinjyo

Gojo

Naka*

Tsujie

Oseko

NIshiki

Hataya

Tenma

Meoto Asahi

Johoku

Kidune

Daiko*

Sakae

Kameya

Sanno

Koshiop

Suzaki*

Sakura

Sujitigai Sanage

Tabata

Ruriko

KIzaemon

Takasho

Horihata*

Tennozaki

Sumiyoshi

Habashita

Kurokawa

Shi

Kitashimizu

Atuta Kinen

Furuwatari* Matsushige*

Point of survey(Bridge) Chigonomiya

Nakatsuchido KurokawaNo1 Minatoshinbashi ＊：Survey point where the number data is under 10

Note: the number of litters per one survey = the number of each litters found in all surveys / the number of surveys

＊the number of litters is the number of litters found through all surveys “If some kind of garbage was found “countless (=***)”in some survey, Photo: secretariat it counts “10”, the maximum number in one survey substituted for the number of “countless” July.2013

Kameya Bridge～Sumiyoshi Bridge 83 From 2nd to 6th stage : With TRWKR No rain on the day and the previous day Kind of floating Litters(component ratio) From 7th to 14th stage : No TRWKR No rain on the day and the previous day

■ Litters component：Plastic wastes(PE, PP, form bowl, foam tray, PET, etc.), can, glass, Cigarette(wrapping, butt)

( ) Number of survey plastics can bottle paper cigarette 1% 1st (145) 76% 13% 2% 8%

２nd (255) 70% 7% 2% 15% 6% 1% 3rd (191) 72% 6% 18% 3% 1% 4th (54) プラスチック系が多い64% 5% 12% 18% 5th (119) 72% 6% 2% 14% 6%

６th (66) 80% 15% 5% 1% With TRWKR 7th (90) 64% 7% 20% 8% 8th (75) 54% 5% 3% 20% 18%

９th (81) 72% 5% 15% 8% 1% 10th (122) 50% 7% 6% 36% 1% 11th (122) 70% 8% 13% 8% 1% 12th (106) 68% 3% 18% 10%

13th (101) 59% 9% 2% 11% 19% 14th (89) 68% 6% 17% 9% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 注）Rate of litters(%)＝the number of each kind of litters ／the number of all kind litters×100 the number does not include leaves branches and grass ＊the number of litters is the number of litters found through all surveys “if some kind of litters were found ”countless (=***)”in some survey, it counts “10”, the maximum number in one survey substituted for the number of “countless” ■What kind of floating litters were found frequently? →The rate of plastics is high, 50～80% 84 We observed creatures around Kurokawa No.2 Bridge placed upstream of Horikawa. Six native fish; carp, gibel, hemibarbus barbus, pale chub, goby minnow and catfish, and four ８． Living Things alien fish; northern snakehead, black bass, bluegill and arowana were confirmed. And we saw birds feed on these fish; kingfisher and little egret.

Arowana _ alien species pale chub

Japanese mitten crab Kingfisher Gray wagtail

Near Kurokawa No. 1 Bridge Nishiki Bridge November 1, 2013 September 26(Thu), 2013 Report: Kawasemi survey group Report: Kawasemi survey group

Kingfishers fly in the upstream of Horikawa like daily. Many people rally to Kingfisher Egret photograph kingfishers, so January 4 (Sat), 2014 January 9(Thu), 2014 you can make friends each other naturally.

Full of Nature and Humanity in Horikawa upstream area. Report: Kan- Nagoya-ko Sea-bass Report: Goyousui-ato-gaien- Challenge group December 8, 2013 aigokai Survey Group Horikawa Shirotori Bridge Juveniles of black-crowned night heron perch’s run-up January 15(Wed), 2014 85 Near Nishiki Bridge - Naya Bridge Report: Kawasemi chosatai, November 1(Fri) - 2013

Hordes of mullet run-up

Around Shirotori area Horikawa, and around Atsuta Bridge Shin-Horikawa River Report; Kojo-Horikawa-to-seikatsu-wo-kangaeru kai, November 2 ( Sat ), 2013

January 18( Sat ), 2014 Johoku Bridge and Kinjo Bridge Shot in downstream of Kinjo Bridge around 3:30 pm Report : HSC, Goyousui-ato-gaien-aigokai Survey Group and Secretariat

2 pm January 18(Sat), 2014 Johoku Bridge Report: Goyousui-ato-gaien-aigokai Survey Group 86 Hordes of mullet run-up Tabata Bridge and the Bridge Kitashimizu 8:00 am January 19(Sun), 2014

Hordes distributed throughout Kitashimizu Bridge, Kinjo Bridge and Johoku Bridge

8:00 am at high tide January 22 (Wed), 2014 Run-up to Kurokawa Bridge over Kitashimizu Bridge

January 23, 2014 (Thu) High tide, early morning Hordes reach to the bottom of Shiga Bridge

January 23(Thu), 2014 afternoon Upstream area; water transfer from Shonai river was under suspension

Report and photography: Goyousui-ato-gaien-aigokai Survey Group, Secretariat 87 January 24, 2014 near Sanage Bridge

January 23(Thu), 2014 Water transfer from Shonai river resumes Shiga Bridge - Kurokawa Bridge Fish were treading water near the surface for oxygen deficiency Mullets regained vitality Dozens of fish died * water transfer from Shonai river stopped

Report and photography: Goyousui-ato-gaien-aigokai Survey Group and Secretariat 88 (Reference) Records of large amount of mullet’s run-up Chunichi Shimbun evening paper March 13(Tue), 2008 in 2008, 2009 and 2014

堀川におけるボラ大量遡上の記録(平成20年、21年、平成26年) 平成20年平成21年平成26年北清水橋北清水橋城北橋～北清水橋年月日潮回り錦橋年月日潮回り錦橋年月日潮回り錦橋～猿投橋～猿投橋北清水橋～猿投橋 1月1日小潮 1月1日中潮 1月1日大潮 1月2日長潮 1月2日中潮 1月2日大潮 1月3日若潮 1月3日小潮 1月3日大潮 1月4日若潮 1月4日小潮 1月4日中潮 1月5日中潮 1月5日小潮 1月5日中潮 1月6日中潮 1月6日長潮 1月6日中潮 1月7日中潮 1月7日若潮 1月7日小潮 1月8日大潮 1月8日中潮大量遡上 1月8日小潮 1月9日大潮 1月9日中潮 1月9日小潮 1月10日大潮 1月10日中潮 1月10日長潮 1月11日大潮 1月11日大潮 1月11日若潮 1月12日中潮 1月12日大潮 1月12日中潮 1月13日中潮 1月13日大潮 1月13日中潮 1月14日中潮 1月14日中潮 1月14日中潮 1月15日小潮 1月15日中潮 1月15日大潮 1月16日小潮 1月16日中潮 1月16日大潮 1月17日小潮 1月17日小潮 1月17日大潮 1月18日若潮 1月18日小潮 1月18日大潮大量遡上 1月19日中潮 1月19日小潮 1月19日大潮 1月20日中潮 1月20日長潮 1月20日中潮 1月21日中潮 1月21日若潮 1月21日中潮大量遡上 1月22日大潮 1月22日中潮 1月22日中潮 1月23日大潮 1月23日中潮 1月23日小潮 1月24日大潮 1月24日中潮 1月24日小潮 1月25日大潮 1月25日中潮 1月25日小潮 1月26日中潮 1月26日大潮 1月26日長潮 1月27日中潮 1月27日大潮 1月27日若潮 1月28日中潮 1月28日大潮 1月28日中潮 1月29日小潮 1月29日大潮大量遡上 1月29日中潮 1月30日小潮 1月30日中潮 1月30日大潮 1月31日小潮 1月31日中潮 1月31日大潮 2月1日長潮 2月1日中潮 2月1日大潮 2月2日若潮 ○ボラ死骸 2月2日小潮 2月2日大潮 2月3日中潮 2月3日小潮 2月3日中潮 2月4日中潮 2月4日小潮 2月4日中潮 2月5日中潮 2月5日長潮 2月5日中潮 2月6日中潮 2月6日若潮 2月6日小潮 2月7日大潮 2月7日中潮 2月7日小潮 2月8日大潮 2月8日中潮 2月8日小潮 2月9日大潮 2月9日大潮 2月9日長潮 2月10日中潮 2月10日大潮 2月10日若潮 2月11日中潮 2月11日大潮 2月11日中潮 2月12日中潮 2月12日大潮 2月12日中潮 2月13日小潮 2月13日中潮 2月13日中潮 2月14日小潮大量遡上 2月14日中潮 2月14日大潮 2月15日小潮 2月15日中潮 2月15日大潮 2月16日長潮 2月16日小潮 2月16日大潮 2月17日若潮 2月17日小潮 2月17日大潮 2月18日中潮 2月18日小潮 2月18日大潮 2月19日中潮 2月19日長潮 2月19日中潮 2月20日中潮 2月20日若潮 2月20日中潮 2月21日大潮 2月21日中潮 2月21日中潮 2月22日大潮 2月22日中潮 2月22日小潮 2月23日大潮 ○大量死 2月23日中潮 2月23日小潮 2月24日大潮 2月24日大潮 2月24日長潮 2月25日中潮 2月25日大潮 2月25日若潮 2月26日中潮 2月26日大潮 2月26日中潮 2月27日中潮 2月27日大潮 2月27日中潮 2月28日小潮 2月28日中潮 2月28日中潮 2月29日小潮 ○ボラ死骸 3月1日中潮 3月1日大潮 3月1日小潮 3月2日中潮 3月2日大潮 3月2日長潮 3月3日小潮 3月3日大潮 Mass mortality of fish might be caused by 3月3日若潮 3月4日小潮 3月4日中潮 3月4日中潮 3月5日小潮 3月5日中潮 3月5日中潮 3月6日小潮 3月6日中潮 overlapping of interruption of water transfer from 3月6日中潮 ○大量死 3月7日長潮 3月7日小潮 3月7日大潮 3月8日若潮 3月8日小潮 Shonai and Kiso River, and low water volume in 3月8日大潮 3月9日中潮 3月9日小潮 3月9日大潮 3月10日中潮 3月10日小潮 3月10日大潮 3月11日大潮 3月11日長潮 spring tide in 2008. 3月11日中潮 3月12日大潮 3月12日若潮 3月12日中潮 3月13日大潮 3月13日中潮 3月13日小潮 3月14日中潮 3月14日中潮 Hordes of mullet consumed oxygen from lesser 3月14日小潮 3月15日中潮 3月15日中潮 3月15日小潮 3月16日中潮 3月16日大潮 3月16日長潮 3月17日小潮 3月17日大潮 amount water, and they were killed by oxygen 3月17日若潮 3月18日小潮 3月18日大潮 3月18日中潮 3月19日小潮 3月19日大潮 3月19日中潮 3月20日小潮 3月20日中潮 deficiency. 3月20日中潮 3月21日長潮 3月21日中潮 3月21日大潮 3月22日若潮 3月22日中潮 3月22日大潮 3月23日中潮 3月23日小潮 Water Transfer from Shonai and Kiso River wasn’t 3月23日大潮 3月24日中潮 3月24日小潮 3月24日大潮 3月25日中潮 3月25日小潮 interrupted in 2009, and mass mortality of mullet did 3月25日中潮 3月26日大潮 3月26日長潮 3月26日中潮 3月27日大潮 3月27日若潮 3月27日中潮 3月28日大潮 3月28日中潮 not occur this year. 3月28日中潮 3月29日大潮 3月29日中潮 3月29日小潮 3月30日中潮 3月30日大潮 89 3月30日小潮 3月31日中潮 3月31日大潮９．ＤｉｒｅｃｔｉｏｎｏｆＷｉｎｄ Wind for upstream and downstream for upstream is more frequent.

Meoto Bridge Kitashimizu Bridge Johoku Bridge for upstream for upstream for upstream 100 100 100 80 15% 80 29% 80 30% 60 60 60 40 40 from side 40 from side 20 20 20 0 from side 0 0 8% 58% 10% 50% 31% 26% 1st～14th Stage 1st～14th Stage number of data 63 1st～14th Stage number of data 59 for downstream number of data for downstream 11% 19% for downstream 13%

Koshio Bridge Nishiki Bridge Oto Bridge for upstream 100 12% for upstream for upstream 80 100 32% 100 9% 60 80 80 40 60 60 for sidefor from side 20 40 40 20 0 from side 20 from side 0 0 19% 34% 10% 14% 6% 30% 1st～14th Stage 1st～14th Stage number of data 69 1st～14th Stage for downstream for downstream number of data number of data 35% for downstream 44% 55%

for downstream

■ Direction of wind We organized the data through all surveys(1st stage ~14th stage). The winds for up stream and downstream are more frequent than the winds for side are. The rate of winds for upstream and downstream is 80% at Nishiki Bridge. 90 １０．Result of survey on Shin-horikawa Shin-Horikawa Kojo Horikawa to Seikatsu wo Kangaeru kai Team NTT Smile Nagoya

91 Impression of water pollution / Shin-Horikawa Impression is bad at Oi Bridge dirty slight dirty ordinary slight clean clean ■ Impression of water pollution 100% 8 15 →“dirty” and ”slightly dirty” at Uzura, Kinen 50 and Oi Bridge(upstream). 54 “slightly dirty” and “slightly clean” at Atsuta 68 75

） Bridge (downstream). % （ 50% 100 Impression of the water pollution is

77 worse in upstream than in downstream. pollution 50 46 Impression Impression ofwater 32 25 0% Atsuta Horagai Oi Kinen Uzura Maizuru number of data 13 2 13 16 19 1 Not enough data Not enough data Transparency / Shin-horikawa Low transparency at Oi Bridge ■ Transparency

→Over 70cm(acceptable range for citizens) around Kinen Bridge in upstream and Atsuta Bridge in downstream.

But only 43cm around Oi Bridge.

＊We defined ”Clean “-”Ordinary” as acceptable range for citizens, 92 Not enough data Not enough data transparency over 70cm in number. ＣＯＤ / Shin-Horikawa

■ ＣＯＤ

→COD at Kinen, Oi and Horagai Bridge. in upstream is 18～20ｍｇ／Ｌ.

At Atsuta Bridge in downstream it is 15mg/L that is lower than other 3 points in upstream.

Not enough data Not enough data Ｂｕｂｂｌｅｓ / Shin-Horikawa ■ Bubbles

→Bubbles were seen at Uzura, Kinen and Oi Bridge.

At Uzura Bridge in upstream, 90% of bubbles rose from the bottom of river. Bubbles from the riverbed seems more often in upstream. Bubbles from riverbed

are more in upstream They were not seen at Atsuta bridge.

Not enough data Not enough data 93 Ｓｍｅｌｌ / Shin-Horikawa

The percentage of “Terrible smell” – “Bad smell” is higher in upstream.

■ Smell 39％ 44％

26％ →The percentage of “terrible smell” – “bad smell” is between 26% and 44% at number Uzura, Kinen and Oi Bridge in upstream. of data And smell of “Ditch”, ”Sludge” and Not enough data Not enough data “Rotten Egg” were smelled then.

Ｋｉｎｄｏｆｓｍｅｌｌ / Shin-Horikawa “smell slightly” and “no smell” around Atsuta Bridge in downstream.

Smell of ditch sludge rotten eggs pulp sea others 100% 8 6 ・oily smell 14 ・no smell

80% 25 7

） 67 %

（ 60% 100 94 40% 79 67 Smell of “Ditch”, ”Sludge” and “Rotten Egg” kind kind ofsmell 20% 33 were smelled more often in upstream. No data 0% Atsuta Horagai Oi Kinen Uzura Maizuru number 3 1 12 16 14 0 of data Not enough data Not enough data 94 Ｃｏｌｏｒｓｏｆｒｉｖｅｒｗａｔｅｒ / Shin-Horikawa

■ Colors of river water

→Greenish 3 colors were often seen in Shin-horkawa. Milky white was seen at Kinen Bridge, that is assumed to be caused by sulfide. Greenish And green brown appeared Kinen, Oi Greenish Greenish colors and Atsuta Bridge. It is assumed to be colors Greenish colors 79％ 53％ caused by the phytoplankton that Colors 65％ sometimes accounts red tide. 54％

number of data Not enough data Not enough data

At Kinen Bridge Report & Photo ： Team NTT Smile Nagoya

May 28, 2013 grey green June 25 pale yellow green grey July 30 pale yellow green grey August 28 milky white

December 27 pale yellow green grey September 26 pale yellow grey October 30 pale yellow grey November 29 pale yellow green grey 95 11. For awareness among citizenship; learning meetings

Parent-child 30 pairs; 70 people participated 1st Horikawa round table Kurokawa parent-child observation meeting July 30 (Tue), 2013 August 17 (Sat), 2013 Organizer: Horikawa machidukuri-no-kai

HSC2010 13th expedition meeting September 29 (Sun), 2013 Report : Secretariat

2nd Horikawa round table January 16 (Thu), 2014 Organizer: Horikawa machidukuri-no-kai

Kiso River headwaters Forum > January 25 (Sat), 2014 Organized by Suigen-no-sato-wo-mamorou Kisogawa-ryuiki-min min-nokai

<10th Making of beautiful port city in Chubu Forum New attraction in Nagoya made by port city November 18 (Fri), 2013 96 For awareness among Inspectorates from Wanouchi-Gifu visit citizenship; learning meetings Horikawa River Guide: Nagoya Horikawa Lions club November 6 (Wed), 2013 Report :御用水跡街園愛護会調査隊・事務局

Lecture by Horikawa 1,000 expedition Secretariat November 7 (Thu), 2014 Chunichi October 19 (Sat), 2013 Shimbun, from morning paper At 9th Nagoya University Homecoming Public symposium about Horikawa and Day Naya Bridge for 100 years memorial Marunouchi junior high school freshman Future and Past To bridge history experienced Horikawa cruse on board January 25 (Sat), 2014 November 28 (Thu), 2013 Organized by: ( public goods ) Nagoya Implementation : Nagoya Host Lions club construction business services Board guide : Nagoya Horikawa Lions club Foundation

Nakagawa Canal revival Symposium 2013 “Good river" Aichi making workshop " Nakagawa canal colored by Mechanism of technology and promotion of its history, landscape and art" multi- natural river works : theme November 30 (Sat), 2013 January 22, 2014 ( Wed) 97 Activities such as research and improved by unofficial support team Kojo-Horikawa cleaning operation July 13 (Sat), 2013 Production: Kojo-Horikawa-to- seikatsu-wo-kangaeru-kai

Clean-up activitiy Gifu-Shin Moomin Shimizu Horikawa-oentai June 15 (Sat), 2013

Pollution survey in Nakagawa canal Chunichi Shimbun July 28 (Sun), 2013 From the morning paper 8 hours continuous surveillance By Kojo-Horikawa-to-seikatsu-wo-kangaeru-kai September 10 (Tue), 2013

Fixed part survey and clean-up activities First time clean-up activities by Kawasemi Survey team from Nakanihon-kensetsu consultant by Ciss survey team “Horikawa-Osoji-tai” August 27 (Tue), 2013

98 Activities such as research and improved by unofficial support team Cleanup activity by Nanairo member August 17 (Sat), 2013

Fish survey September 6 (Fri), 2013 Report :Goyousui-ato-gaien-aigokai Cleanup activities by Goyousui-ato-gaien-aigokai Survey Group Survey Group

September 6 (Fri), 2013

October 23 (Wed), 2013

Opening demonstrations "New style of sho calligraphy" September 20 (Fri), 2013 Report :Goyousui-ato-gaien-aigokai Survey Group November 28 (Thu), 2013

Kentsu Shinbun September 10 (Tue), 2013 Renewal of estuary tide Pruning of branches of cherry tree floodgate of Horikawa December 2 (Mon), 2013 September 27 (Fri), 2013 99 Injured egret Activities such as research and improved by unofficial support team

Horikawa Oentai Kaiyougaku Kenkyujo Mr.Masamichi Hayashi Taiwan Kaiyogaku schooling September 10 (Tue), 2013

Clean-up activity in Autumn Horikawa by Clean Horikawa September 21(Sat), 2013 Report: secretariat

Chunichi Shimbun Morning edition Chunichi Shimbun Morning edition Cleanup activity by Nagoya Horikawa Lionsclub September 13(Fri), 2013 January 6 (Mon), 2014 October 12 (Sat), 2013 100 Activities such as research and improved by unofficial support team

Chunichi Shimbun Gallery and lecture Morning edition “100 years of Nayabashi, and Horikawa” Report by Suigen-no-sato-wo-mamorou October 22, 2013 October 22-November 4, 2013 Kisogawa-ryuiki-min min-nokai Organized by Horikawa bunka tansakutai and “Upstream thinks Downstream, Downstream Horikawa bunka-wo-tsutaerukai thanks Upstream” Report by Iwashi survey team

Report by Isewan ryuiki-saisei network Report by Kamenoko team Check HST’s website http://www.horikawa1000nin.jp/ 101 Activities of “Free Survey Groups” & “Cheering Groups”

“Switch” on Tokai TV program focused on Goyosuiato-gaien- aigokai-chosatai, 2013/12/3(Tue)

Chunichi Shinbun 2013/11/13(Wed)Morning eddition Mainichi Shinbun 2013/10/23（Wed）Morning eddition

Chubu Keizai Shinbun 2013/12/30(Mon) Activity of “Kurokawa Dream Kai”

Show at Horikawa Gallary The 19th Clean Project in Autumn Water suply start 100th anniversary photo exhibition 2013/11/12（Tue）～12/1（Sun） 2013/11/16（Sat） 2014/1/15（Wed） Kojo/Horikawa-to-Seikatsuwo-Kangaerukai Ise Bay Basin Network Report：Goyosuiato-gaien-aigokai-chosatai 102 Horikawa Clean Experiment of Chinese water spinach 2013/6/21(Fri)～10/16(Wed) Ena agricultural High School and Nagoya Horikawa Lions Club experimented this year. Place：near the pier of Naya Bridge

9th week th Start 15 week 8/23(Fri) 6/21 (Fri) 10/4(Fri)

1st week 11th week 16th week 6/28 (Fri) 9/6(Fri) 10/11(Fri) 2013/10/16 (Wed) Removal work Mosquito fish/Goby Sesarma Shrimp etc.

3rd week 12th week 7/12 (Fri) 9/17(Tue) Carp Stried mullet

Damselfly Budworm 5th week 13th week 7/28(Sun) 9/20(Fri)

Mosquito fish The living came floating mass of Chinese water 7th week th 14 week spinash 8/12(Mon) 9/28(Sat) 103 Activities of “Free Survey Groups” & “Cheering Groups” Ena agricultural High School Sludge, of Horikawa river, analysis exerimennt is 2013/10/16(Wed) Date of Horikawa river water quarity under sontinuation. 2013/7/30(Tue) Pick up sludge

2013/10/8(Tue) Reconstructioｎ support activities by the Chinese water spinach cultivation at the farmland of tsunami hazard area of the Great East Japan Earthquake.

Many fish were in the trap.

Small fish like mosquito fish

Shrimp, Crab and Many bivalves was attached 104 Larva and so on to the basket. Events

Mainichi Shinbun 2013/8/26(Mon) Morning eddition Kiso Slow Food Highway Festa 2014/2/8(Sat)

The 9th”Horikawa Eco-robot Contest 2013” 2013/8/25(Sun) The 11th Horikawa Water Magic Festibal Sponsorship: Collaborative event Nagoya-Horikawa Lions Club ”Horikawa Oyako Kankyo Cruise” Nagoya Inst. of Technology 2013/10/5(Sat)

Picnic in Naya Bridge 2013/10/27(Sun) The 11th Horikawa Water Magic Festival 2013/10/25(Sat) 27(Sun)

“Walking event, while feeling the charm of Kurokawa river” 2013/11/16(Sat) Organizar: Kita Word, Kurokawa Dream Kai etc Report: Goyosuiato-gaien-aigokai chosatai

Sewerage Science Museum Festival 2013/9/7(Sat)8(Sun) Nagoya Ecological Day 2013 in Autumn Report: Goyosuiato-gaien-aigokai chosatai 2013/9/14(Sat) Dislay: Nagoya-Horikawa Lions Club, Nagoya city silver college the 27th department of environmentology, 105 Ise Bay Basin Reclamation Network Events

7th Kiso three rivers connects mountains and urban area internet forum 2013/12/1(Sun) Plan/organization: Kiso three rivers connects mountains and urban area internet forum executive committee, Horikawa Sen-nin Chosatai 2010 executive committee (joint) Special cosponsorshi: Asahi Breweries Ltd. 106 General incorporated association Chubu-chiikidukuri Kyokai