Outline of Tone Canal Project

Incorporated Administrative Agency Japan Water Agency

The views expressed in this presentation are the views of the author and do not necessarily reflect the views or policies of ADBI, the Asian Development Bank (ADB), its Board of Directors, or the governments they represent. ADBI does not guarantee the accuracy of the data included in this presentation and accepts no responsibility for any consequences of their use. Terminology used may not necessarily be consistent with ADB official terms. 1.1. OutlineOutline ofof ProjectProject LocationLocation MapMap （（KantoKanto plainplain））

Tone Canal service coverage Tokyo of agri.(29,000ha) Metropolis Altitude Area Water Facility Irrigation 3,000m Paddy 2,000 Drainage 1,000 Uplan 500 Divertion 200 d 0 Residentia Pumpimg l JWA Dam

ToneTone CanalCanal ProjectProject Others Dam Aimata Dam JWA Barrage Sonohara dam OutlineOutline JWA domestic and Industrial Sonohara Dam Canal JWA Irrigational Canal

Kusaki Dam Tone river Tone Takizawa Dam Diversion weir Watarase Urayama dam Ara river retarding basin

Service Area of domestic water Service area (about 11million people) of agricultural water (29,000ha) Service Area Industrial water 743 Mil m3 of Industrial water Tokyo Domestic, Industrial, (about 370 company) or etc water 1,034 Mil m3 Metropolis TOTAL 1,778 Mil m3 ( per year 2005) Tokyo bay OutlineOutline ofof thethe ToneTone CanalCanal ProjectProject • Tone Canal Project was carried out during 1963 to 1968. • Intake water quantity from Tone river was max 138m3/s （ 134m3/s, nowadays）.

33 PurposePurpose ofof thethe ProjectProject

①① ToTo supplysupply MunicipalMunicipal WaterWater forfor TokyoTokyo metropolitan,metropolitan, SaitamaSaitama andand GunmaGunma prefecture,prefecture, developeddeveloped byby damsdams inin upperupper sitesite ofof ToneTone RiverRiver andand AraAra River.River.

②② ToTo supplysupply IrrigationIrrigation WaterWater stablestable forfor 29,000ha29,000ha paddypaddy fieldfield inin ToneTone RiverRiver middlemiddle reach.reach.

③③ ToTo supplysupply PurgingPurging WaterWater forfor SumidaSumida River.River.

6 Tone Diversion Weir

Gyoda water Purification Musashi Plant To Supply Municipal Water Canal for Tokyo and Saitama prefecture. Ara We convey water developed by River Domestic water for dams in upper site of Tone Saitama Pref. Okubo River through Musasi Canal Water Purification Plant and Ara River. Akigase Diversion Weir Asaka Water Purification Plant (Tokyo Metro) “““TokyoTokyoTokyo DesertDesertDesert””” oror “““OlympicOlympicOlympic DroughtDrought”” inin 19641964

Water Shortage of Ogouchi Dam（1964） Water Delivery by National Defense Force

Water delivery by water tank car PopulationPopulation growthgrowth andand WaterWater supplysupply capacitycapacity inin TokyoTokyo

（103 ｍ3/day） （104 people） 9,000 1,300

8,000 1,100 7,000 Populatin in water supply area 900 6,000

5,000 700

4,000 500 Muximun Water Population 3,000 supply per day Water ammount 300 2,000 1968 100 1,000 Capacity of Tone Canal System water resources Completed 0 -100 1949 1959 1969 1978 Tone Diversion Weir Oura Canal

Saitama Canal

Kasai Canal

To Supply Irrigation Minumadai Canal Water stable for 29,000ha paddy field in Tone River middle Paddy field reach. IrrigationIrrigation waterwaterwater’s’’ss IntakesIntakes UnificationUnification

Tone river →river bed down ↓ Unstable intake

Link canal

Dam up →capable to water intake stable Link canal Tone Diversion Weir

Musashi Canal

To Supply Tone Ara River’s Surplus River Water for Sumida River’s purification water. Akigase Diversion Weir

Shingashi River

Sumida River VolumeVolume ofof WaterWater IntakeIntake fromfrom thethe ToneTone BarrageBarrage perper yearyear 100million m3/year ：Municipal ：Purging ：Agriculture

20

15

10

5

0

1965 1967 1969 1971 1973 1975 1977 1979 1981 1983 1985 1987 1989 1991 1993 1995 1997 1999 2001 2003 2005

2.2. ActivitiesActivities RelationshipRelationship ofof JWA,JWA, WaterWater users,users, andand AdministratorAdministrator

Administrator of river JWA head office Management Council Maintenance Dep. member management Dam Council on Tone Canal Management office Dam JWA office (Representatives of users) order send send member water report member (Irrigation water) Tone-river request Dams integrated Supervise Tone Canal Council on Intake ManagementMLIT Office water flow Maintenance Unification of Kanto Regional supply Tone River Office water Development ６ Tone-river order Annual order Land Upstream Office Daily report Daily report Improvement send I Districts (MLIT= Ministry of Land, Infrastructure, water Transport and Tourism ) (Municipality water) ４ Akigase and Minuma request Purification Plant branch office Council on water shortage Office ・ supply prefectures Council on Council on member water Water Users Tone-river water Ara-river water member shortage shortage Saitama Canal（Water ammount of intake(m3/s),2006） 250 30 (m3/ s ) rainfall(mm/day)

Intake Water rights 25 200

20 150

15 100

10 Rainfall 50 5

0 0 123456123456123456123456123456123456 mo n t h Ａｐｒｉｌ Ｍａｙ Ｊｕｎｅ Ｊｕｌｙ Ａｕｇｕｓｔ Ｓｅｐｔｅｍｂｅｒ Annual Ammount of wat er 248, 310, 000m3 SupplyingSupplying waterwater forfor usersusers properly,safely,stabilityproperly,safely,stability

Refusing dusts in canal Ｃanal Ｇate Operation & Patrol

Operation-room (Monitor & Operation)

Inspecting gates Inspecting Information equipment MaintenanceMaintenance onon preventingpreventing disasterdisaster

Flood time operation in Operation -room Facility Patroling at flood time

Oil -fence setting for Water quality accident Flood-time Operation （Full gates open） 3.3. FacilitiesFacilities OverviewOverview ofof thethe FacilitiesFacilities Toneka Meiwa Bando Kitakawaberyo Canal Canal Canal Canal (Toneka Pumping Station)Q=1.910m3/s Ｐ ) (Q=5.111m3/s) Oura Canal Tone River Tone diversion weir Q=134.064m3/s Gyoda Canal Settling Saitama Canal (Q=29.493m3/s) Basin Gyoda Water Purification Plant Hanyuryo (Q=4.815m3/s) Inago Furutone Musashi Canal Kasai Canal Canal Canal Canal (Q=50m3/s) (Q=41.772m3/s) Minumadai Okubo Water Ara River Purification Plant Canal (Q=14.183m3/s)

Shingashi River

Asaka Canal Akiga Asaka Water Div se Purging water ersion Purification Plant Weir (Q=28.964m3/s) (Q=23.4m3/s) ToneTone DiversionDiversion WeirWeir

Upper gate overflow

Lower gate underflow

Regulating gate

To intake water stably, we maintain upstream water level stably by using Regulating gates. SukaSuka SluicewaySluiceway crossingcrossing ofof thethe LeveeLevee

We intake expected water stably by using the sluice gates. SettlingSettling basinbasin

The very wide Settling basin plays a very important role to maintain water level stable to divide water properly. MusashiMusashi CanalCanal forfor CityCity WaterWater

Musashi canal convey city water to metropolitan area. Oura Pumping Station

Qmax=5.11m3/s pumpφ900mm×2

Toneka Pumping Station

Qmax=1.91m3/s pumpφ700mm×2 IrrigationIrrigation WaterWater (Oura(Oura Canal)Canal)

We convey irrigation water and divert by natural water flow. So, we have check gates to maintain water level proper for diversion. FacilitiesFacilities ofof IrrigationIrrigation CanalCanal Diversion works and Branch canal.

Small diversion works OperationOperation roomroom

Graphic panel in the control room helps the operator to monitor the intake condition and the water distribution of the canals. We can tell-control each gate of main points of facility. InformationInformation processingprocessing equipmentequipment roomroom

The computer system captures, stores, processes and displays a large amount of data, such as water levels, gate status, and flow volume, which are gathered at and transmitted from observation points. Radio room

Radio system send and gather data to the relative bodies and from Radio steel tower each observation points. Water control device Gate of Canal

Gate control, water level-flow observatory 4.4. ActivitiesActivities forfor environmentenvironment andand ecologyecology

（（ ImprovementImprovement fishwaysfishways ofof BarrageBarrage））

Tone Diversion Wier

No.3 Fishways

No.2 Fishways Downstream No.1 Fishways bed protection works ImprovementImprovement ofof fishwaysfishways

After

Let fish know the Improvement “Entrance is here!!”

Strong flow

Resting area Old Type (Too rapid for fish to swim up the flow) MainMain TargetTarget FishFish

Ayu … a migratory species indigenous Japan

Salmon

female male

NumberNumber ofof SalmonSalmon byby yearsyears throughthrough fishwaysfishways ofof ToneTone WierWier

5,606 Fish age (1989～2004 集計平均） 6,000 不明魚 ２年魚 5,800 ６年魚 5,600 3.4% ３年魚 ５年魚 4.6% 4,769 5,400 0.0% 24.5% 5,200 16.9% 5,000 4,800 4,600 4,400 4,200 ４年魚 4,000 50.6% 3,800 3,215 遡 3,600 3,400 ２年魚 ３年魚 ４年魚 ５年魚 ６年魚 不明魚 上 3,200 3,000 数 2,800 2,600 2,283 2,400 2,200 Fish way 2,000 1,800 Improvement 1,515 1,600 1,266 1,400 1,090 1,200 733 729 1,000 608 662 800 516 600 258 261 259 211 194 311 400 21 35 45 96 82 200 121 117 133 0

3 4 5 6 7 8 9 0 1 3 4 5 6 8 9 0 1 2 3 4 5 6 7 08 99 99 198 198 198 198 198 198 198 199 199 1992 1 199 199 199 1997 1 199 200 200 200 200 200 200 200 200 20 Tone Diversion Weir

Water level-flow Sediment flushing gate Flood gate No.1 fishways observatory Regulating gate Gunma Prefecture

Saitama Prefecture

Tone Diversion Weir Intake crest Suka利根大堰 Sluceway Weir crest length:691.7m Intake crest length:124.8m No.of sluiceways:3main,3sub No.of gates:12 Max.water intake: Sub-flood gates of Sluiceway To intake water stably,we maintain 134.064m3/s are automatic control to upstream water level stably by using (Municipal Water,Irrigation regulate water level of Regulating gates. Water,Purging Water) settling basin. Settling basin Musashi Canal Minumadai Canal MInumadai Canal is about The Musashi Canal is 61.3km length. The Canal approximately 14.5km in supplies agricultural water Oura Canal Saitama Canal length. It was created to to a 15,400 hectare of land Oura Canal is about Saitama Canal is about divert water from the and domestic water to 16.6km length and 17km length and we Tone Diversion Weir to Saitama and Tokyo. supplies agricultural water divide water to Kasai the Ara River. to a 2,000 hectare of land.. Canal on the way. Radio steel tower The various information on Gyoda Canal situation of river upstream and Saitama Canal Tone canal are exchanged with the external organization using radio equipment.

Extending from the left bank (Gunma side) of the Tone River, this canal provides water from the Diversion Weir.

Settling basin Main diwersion gate Gyoda Canal Entire length 245m,effective length Water for the Minumadai intake Gate 127m,100m wide,water 4.5m deep,settling Canal,Saitama Canal and Gyoda Canal is diverted 1m deep,average flow rate 0.4m/s Musashi Canal is taken in directly from the settling The very wide Settling basin plays a very through the intake gate and basin. important role to maintain water level passed through the settling stable to divide water properly. basin to the main diversion gate.