Potoky pro život ‒ Streams for Life
PROJECTS COMPLETED FROM 2005 TO 2015
10 years of revitalization projects in Prague MOTTO: „WE RETURN LIFE AND NATURAL BEAUTY TO STREAMS.“
Apart from the rivers of Vltava and Be- OBJECTIVES OF THE “STREAMS FOR LIFE PROJECT” rounka, another 357 kilometres of smal- ler watercourses flow through Prague, of 1. ENVIRONMENTAL which 308 km are managed by the City of Prague, 18 km by Povodí Vltavy, state en- Modification of watercourses in a manner that would provide a basic habitat for water fauna and flora, as well as creation of natural and terprise, 25 km by Povodí Labe, state en- close-to-nature alluvial and stream biotopes. During the revitalization and reconstruction process, particular emphasis is placed on replenishing ri- parian stands, creating littoral and riparian vegetation belts, as well as constructing small eyots, pools, and cutoff meanders. terprise, and 6 km by Lesy ČR, state en- Increasing the number of plant and animal species bound with water ecosystems – enhancement of biodiversity on the territory of the capi- terprise. tal city of Prague, preservation of protected species in the Prague watercourses. During the revitalization process, attention is given to the occur- rence of protected species in streams. Concurrently, efforts are aimed at creating a „tailor-made“ environment for these species that would boost the- The most significant Prague brooks inclu- ir occurrence in the capital city of Prague. de Rokytka, which is the longest stream in the Supporting the exploitation of the self-cleaning functions of watercourses and alluviums. city (with the total length of 37.5 km of which Water oxygenation is improved by constructing ramps and chutes, vegetation elements are used for bank lining, littoral zones are complemented. 30.3 km is located in the territory of Pra- Regular monitoring and improvement of water quality. gue). The largest stream in Prague is the Systematic research is carried out and non-permitted wastewater outlets into watercourses are removed. Botič Stream,with the total length of 34.5 Clearing of watercourses in order to secure the penetrability of migrating water organisms. km. Other major brooks include the Litovic- Cascades and other obstacles are removed or replaced with stone slides. ký and Šárecký Stream (23.4 km), or the Lengthening of watercourses. The revitalization of streams is aimed at retaining the water flowing down the stream and through the landscape as Dalejský (14.3 km) and the Kunratický Stre- long as possible. am (13.3 km). The hardly noticeable small brook of Brusnice is probably the most no- Restoration of the natural function of channel creation and formation. table from a historical point of view, as its name appears in the oldest legends on the 2. TECHNICAL foundation of Prague. Securing the stability and safety of channels during increased flow rates and minimizing damage in the event of high water. Widening of channels with the use of ecological berms facilitating controlled flood flow effusion. Within the reconstruction of technical elements and bank lining, namely natural materials are used, such as stone, wood and vegetation elements..
Removal of former pipeline and concrete channels and their replacement with close-to-nature channels with vegetation accompaniment.
3. CULTURAL, HISTORICAL AND SOCIAL
Increasing the awareness of Prague inhabitants about Prague streams, their history, and their role in the urban landscape. The restoration of the historical channels is based on contemporary documents and historical maps.
Usage of watercourses as green corridors of the city and inclusion of revitalized areas into the citywide system of greenery with a high recre- ational potential. During the revitalization process, emphasis is placed on the aesthetic and recreational value of the landscape along the watercourses.
Development of an information system promoting current projects. Information on projects that are currently underway is published on the websi- tes www.praha-priroda.cz and http://envis.praha-mesto.cz. In addition, information boards may be found at the particular project sites. 14 Project results during 2005–2015 12,33
12 10,348 9,003 • By 2015, 12,3 km of streams were revitalized in the following phases: 10 7,508 8 ‒ 1,1 km technically adjusted 4,808 4,928 ‒ 5,6 km adjusted in a nature close way 6 4,418 ‒ 5,6 km adjusted in a natural way. 3,268 4 1,663 • Stream channels were extended by 3,5 km. 2 0,25 0,29 • Within the revitalization 14.141 m2 of ponds were excavated. 0 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 • Four steps were rebuilt to migratory permeable rocky slides. Increase in length of revitalized streams within ten recent years. Žežulka
Jenerálka Nebušický stream Zlatnice The stream Krutecký stream in the Stromovce Rokytka stream Litovicko-ŠáreckýUnearthing near the Hvězda Over Near the Hořejší Pond the Hořejší Pond In front of the Ruzyně Prison Čihadla – Svépravický stream Below the Smetanka Řepský stream Motolský stream Čihadla Revitalization in Dolní In front of Fidlovačka Cibulka Počernice
The catch The Klukovice Botič Slatina basin in Řeporyje Swimming Pool Záběhlice Kozina square
Chodovecký stream Dalejský stream Košíkovský stream
Zátišský stream Weir In Petrovice
Baňský stream Within the project the following revitalization actions were done:
2015 Hostavický stream – Revitalization Slatina 9 2010 Revitalization in the Stromovka Park 24 Svépravický stream – Revitalization Čihadla II 25 Hostavický stream – Revitalization in Dolní Počernice 10 2009 Botič stream – Redevelopment of the channel 04 Nebušický stream – Revitalization under in Záběhlice the Nebušický Pond 18 Botič stream – Revitalization anti-flood measures near Rokytka – Revitalization over the Hořejší Pond 22 Kozina square 05 Cibulka stream – Unearthing of the channel 06 2014 Řepský stream 23 Dalejský stream – Restoration of the catch basin in Řeporyje 07 2013 Zátišský stream – Stabilization of the riverbed 26 Litovicko-Šárecký stream – Unearthing of the channel Dalejský stream – Removal of the Klukovice near the Hvězda Game Preserve 14 Swimming Pool 8 Rokytka – Revitalization below the Smetanka 21 2008 Rokytka – Revitalization of the Čihadla dry retention reservoir 19 2012 Chodovecký stream – Stabilization of the riverbed 11 Litovicko-Šárecký stream – Revitalization in the 2007 Botič stream – Revitalization of the Botič channel Šárecké valley (Zlatnice, Žežulka, Jenerálka) 16 in front of Fidlovačka 03 Motolský stream – Stabilization of the riverbed 17 Baňský stream – Restoration of three stone dikes 01 Rokytka – Modification of the channel near Košíkovský stream – Revitalization of the channel 12 the Hořejší Pond 20 2006 Botič stream – Wier In Petrovice 02 2011 Litovicko-Šárecký stream – Revitalizace in front of the Ruzyně Prison 15 2005 Krutecký stream – Revitalization 13
www.praha-priroda.cz REVITALIZATION OF THE BÁŇSKÝ STREAM
The Báňský Stream springs in the district of Zbraslav known as Na Báních in Prague 5. The stream is 700 metres long and the difference in elevation of its upstream and downstream endpoints is 80 metres. Seven stone dikes were built along its course to re- duce the gradient, as well as channel ero- sion. The three lower dikes were in a very poor condition. The Báňský Stream has the character of a torrent stream, its ravine cuts its way down a narrow gullet and overco- mes a considerable difference in elevation over a relatively short distance. In terms of aquosity, the stream is largely dependent on precipitation, namely on storm rainfall. The upper half of the stream is without constant water discharge for a major part of the year. Continual discharge is noticeable only from the middle stream, which is fed by a foun- tain on the left bank. The revitalization of the Báňský Stream comprised the restoration of the three lower Repaired stone dike Map of the stream Stone dikes before Natural channel of the dikes, the cleaning of the pool at the first reconstruction Báňský Stream
P dike, the reconstruction of the inlet structu- a o řů v d Spoja
o n K n a re, and the revitalization of the channel. a m m í F u n al e k The repair works carried out on the dikes tys N o o u and the paving were aimed at restoring their va m o á
h d é a original condition and appearance from the r k h s
P e v N ř i a c t p e early 20th century. The masonry on the di- i k u vé ičko Ž K o těpn ž Jiřiny Š v i
l a o
kes and the stilling ponds was repaired and v missing stones were replaced. The channel a was cleaned; silt depositions and vegetation V hluboké
N were removed from the bed. a
B Restoration of three
a Sediments (gravel and mud silting, tree n í stone dikes c branches) were also removed from the pool h at the first dike in order to restore sedimen- tation space near the exit of the stream from
kou the woods where the underground pipeline mín Ka K Nad u b was frequently clogged. The unsatisfactory y to vn inflow into the underground pipeline was re- ám placed with a higher capacity inlet structure.
Remodelled length: 500 metres | Restoration of three stone dikes | Total costs: 1,600,000 CZK 2007 Overview
Investor: City of Prague Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Richard Polifka
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague) Dike function Watercourse Department Representative: Ing. Ondřej Palička Damaged dike walls Cleaned dike pool Newly repaired masonry EXECUTION PERIOD: April 2007 – July 2007
TOTAL COSTS: CZK 1.6 mil- lion
Reconstruction of stone dikes from the early 20th century | Cleaning of the channel | Remodelling of the pipeline inflow 1 BOTIČ STREAM – WEIR IN PETROVICE
The weir on the Botič Stream in the district of Pe- trovice was built in the 17th century. Its main purpose was to increase the water level in the stream so that water could be diverted to a mill in Petrovice through a millrace. When the mill had been closed down after the World War II, the millrace was no longer serving its function and some of its parts were filled in. A few rem- nants of the millrace, however, are still visible on the right side of the Botič Stream below the weir and Eu- klidova Street. In the following years, the weir was ra- ther neglected and it was gradually decaying. In early 2004, only a torso of the original weir remained stan- ding with remnants of its sidewalls that could come tumbling down at any time. The banks above the weir were washed out at several places, the trees on the banks were bending over the stream, and the back of the weir was clogged with mud. Therefore, a project aimed at the reconstruction of the weir and the revitalization of its close surroundings was launched in 2004. With a view of its financial de-
mand,, an application for the co-financing of the pro- C a New rough boulder ramp a Remnants of the original weir Original Petrovice Weir
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o m t K out banks were repaired with the aid of stone-filled u ě w m ká r d e ic č o v o ro ih o N et ob a v op ak v ov J t a N o wire mattresses that were covered with soil and plan- é
v r o Frostova b v
o a ted with willow twigs. The original weir structure was d
a replaced with a rough boulder ramp with several hol- Rough boulder N ramp lows, which serve as throughways for migrating fish. In order to eliminate any changes to the flood land in the district of Křeslice, the boulder ramp is of the same Š tyc Remodelling of the ho height as the preserved parts of the original weir. va channel
The original sidewalls were taken apart and rebuilt F a
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t with new stones. The height of the walls was determi- ů v
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l ned by the requirement for the future placement of a ý ýnu n ml ovu bridge over the Botič Stream that should be a part of ant K F the newly planned bicycle path.
Reconstruction of the weir into the rough boulder ramp | Total costs: CZK 6,000,000 2006 Project The project was co-financed from Overview the eu structural funds (JPD2) and funding by the ministry of regional development
Investor: City of Prague Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Richard Polifka
CONTRACTOR: Nowastav a.s.
DESIGNER: Atelier životního prostředí (Environmental Studio) Ing. Cyril Mikyška Remodelled bank Renovation and stabilization of the banks Damaged banks above the weir EXECUTION PERIOD: with planted vegetation Construction of the rough boulder ramp March 2006 – June 2006
TOTAL COSTS: CZK 6 million
Construction of the rough boulder ramp | Construction of the bank walls for the planned bicycle path | Reconstruction of the bank ruptures | Replanting of vegetation 2 REVITALIZATION OF THE BOTIČ CHANNEL IN FRONT OF FIDLOVAČKA
The Botič is the largest and the best-known Prague stre- am. It springs to the southwest of Prague in the vicinity of the municipality of Čenětice. It flows into the Vltava River near the railway bridge at Výtoň. In the section in front of Fidlovačka, the lining of the channel had been in an emer- gency condition for some time. The section is 183 metres long and it begins at the bridge in Závišova Street in front of Fidlovačka and ends at the bridge in Na Folimance Street. The central concrete part of the stream bed was comple- tely disintegrated, the remaining part was lined with disrup- ted stone paving and crumbling concrete. The channel slo- pes were covered with, among other plants, the tree of hea- ven and the hop tree, which are deemed invasive and unde- sirable plant species. Within the revitalization process, the channel was newly lined with stone paving and naturalized. The original paving and the remaining concrete were removed and the whole channel was thoroughly cleaned.
a R After revitalizationv Map of revitalization Originalyb state Damaged lining The shape of the channel was newly remodelled so that in- o al r ko e va á g u Horsk řko stead of creating a straight ditch, the flowing water, e na L vo d Z waves at the bottom from one bank to the other. Five bends Po were built in this section. The original hard-concrete lining was a B v ě replaced with interlocked stone paving laid in gravel. Similar o le č
i h
r r H a avl Sara F íč jevská d kovy techniques have been used since the early 20th century and Se s sady kaninova R k e á Pe js ru a k may be seen at numerous places to this day. o c v k N v á o a l a s F To reduce the purely technical appearance of the newly Oldřich a o y ova v l o im Na ostrůvku m v a Sám modelled channel, vegetation lining was also used in addi- a ě n a ova z c n e v e h Jaro ti o N mírov š a y i V tion to stone paving. The vegetation lining comprises of va- p a ršo v rov vic S á k taka á Z O rious wetland plants in different colour and variety combi- é C k ti t K radova ř c s eso m N e nations that are planted onto coconut mats. The mats are o y U sl a o m k m v a r
F á aj ý REVITALIZATION i i Z n d then installed in prepared cassettes with the aid of which the k sk l a s o á l Č i v N e k lo a stream bed is stabilized without any special maintenance s v a č u c N Boleslavova Č requirements. Due to the large flow rates in the Botič Stre- e estmírova
N am channel, stone rollers were placed on the sides of the 5 u . s e k ls B v k ar mats to hold them in place and the mats were covered with ě erebkou á va to t Pod T íro šk n Na Vítě Táborská ojm o zné plá M R a ni v a a o nets. After the first vegetation season, each cassette crea- k h s
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i k a ý s ž R k l í ted a compact green isle in the paved channel. P a ř a c a a v
n k v e r Svatos lavova k t o r ko t
e t U á a v c tě Ž a i Š P
Remodelled length: 183 metres | Naturalization of technically remodelled channel | Total costs: CZK 7,000,000 2007 Overview
Investor: City of Prague Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Richard Polifka
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague) Watercourse Department Representative: Ing. Ondřej Palička Revitalized channel – the Installation of vegetation cassettes DESIGNER: resulting state Ekotechnik-inženýring s.r.o. Ing. Jiří Jílek Installation of vegetation cassettes After the completion of construction work EXECUTION PERIOD: July 2007 – December 2007
TOTAL COSTS: CZK 7 million
Removal of concrete cunette and replacement with stone paving laid in gravel | Cunette meandering | Installation of vegetation cassettes in the channel 3 BOTIČ STREAM – REDEVELOPMENT OF THE CHANNEL IN ZÁBĚHLICE
The channel of the Botič Stream in the district of Záběhlice was severely affected by human activity. Waste dumps, landfills, and illegally built structures in the close vici- nity of the Botič Stream resulted in the total degradation of the channel at some locati- ons. The waste dumps along the banks were gradually taken away by high waters and the vegetation growing on such sites was beco- ming a threat. The project of close-to-nature stabilization and cleaning of the channel fo- cused on a 400-metre long section between Záběhlická and K Prádelně streets. Within the project, illegal structures were removed from the channel of the Bo- tič Stream and some of the trees along its banks that could not be saved due to the- ir extremely washed-out roots were felled. The stream banks were cleaned and stabi- lized with the aid of large boulders. Some of these boulders weighed up to 500 kg and were placed on top of each other to Newly remodelled channel Map of revitalization Newly remodelled channel form the resulting shapes. The height of
the lining was selected with a view to its á h v I N Jah I a v c B od in o ová
i o b e N u r l a a t n n a t B í i
o m y function of protecting the surrounding land t ti u ž r č o i r a Ginzov a u á
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d b s á l N o h s n a Slatinc ň F e ov e k k á í o C In general, the project involved the re- ř a v l á n k a
P á v ž m B i ře o čť J a t N í n m ová H s n loh modelling and close-to-nature stabilization a á i o v vá k c l á á p n a
v u y a á S c v o tře of the channel in the residential area with l H m Z o ch e k ová Podle náhonu ří a Newly remodelledo h b C m the use of natural materials, as well as the a ky Sn r p K a ěženk ičná channel B u D t ová rybn o o s Zá l l ě ha n securing of the basic functions of the wa- í m K í C C p n h o rá r a h d o í K eln lo vo ě H u n tercourse. K dě p d rajánko k a Aubrechtové va y r h a Z a Hu P n ť U ská ráčs ý ká l
m U sp U Newly remodelledlavu channel Za potokem S Na C t h ř odo i v m ci
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Total length of the remodelled channel: 400 metres | Revitalization of the channel | Total costs: CZK 3,800,000 2009 Overview
Investor: City of Prague Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Richard Polifka
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague) Watercourse Department Representative: Ing. Ondřej Palička Access to the stream Illegal waste dumps along the stream Devastated channel DESIGNER: Liquidation of waste dumps Atelier životního prostředí (Environmental Studio) Ing. Cyril Mikyška
EXECUTION PERIOD: March 2009 – June 2009
TOTAL COSTS: CZK 3.8 million
Removal of illegal waste dumps and structures from the channel | Cleaning of the channel | Stabilization of the channel by rubble lining 4 BOTIČ STREAM – REVITALIZATION ANTI-FLOOD MEASURES NEAR KOZINA SQUARE
During the floods in 2002, some parts of the channel and the banks of the Botič Stream in this area were severely damaged and disrupted. In the past, the height of the left bank was artificial- ly raised by construction waste. The bank, large- ly overgrown with black locust almost 1.5 metres high at some places, channelled high water du- ring increased flow rates to the lower right bank, which caused the flooding of adjacent structures. As a part of anti-flood measures, the mana- ger of the watercourse, i.e. the Department of En- vironmental Protection of the Prague City Hall, commissioned a project aimed at the overall revi- talization and widening of this part of the channel. Within the execution of the project, the origi- nally deposited construction waste was removed from the bank to a distance of approximately nine metres from the channel. The channel shape was remodelled in order to create a wide berm (bench) Botič channel – the resulting state Situation before liquidation of waste dumps on the left bank, which is connected to the origi- Práčská Z Za d Map of Botič Stream á rahou Crossing near Kozina Square in 1830s nal terrain by an undulating slope with a 1:2 gra- v á e k s c Mikanova k y a á d v a Mirano o v dient ratio. The berm rises 20 cm above the wa- lo l a e V v
á m á a r a k Mattio v ter surface and it is shaped as a natural part of the liho K p s o ž ř é
a á k r f s a channel. Two small pools were created and the P Da li P bo Š m rova
e u
Š Z r K v k channel was split into two branches. Larger boul- ehlov ozmí a r kov a a Po b ders, on which not only animals but also passers- d Pl s ískav k ou á Prů mysl by may rest or sit, were placed along the banks. vě ová Na Plíska Extension of the channel Intensely exposed parts of the slopes were stabi- á Horn sk U oměc ař b holup iv ř ská st eh lized by boulder masonry. Grass was planted on o u H ři í tiva n Hos č the less exposed segments and the whole site is vé o No t V o K p o á regularly mown. zi K no Z vo H n o i ám t a ě r v s k š Overall, the project increased the capacity of tí i o á l in á m d z sk e o ř Na S Ko the channel and concurrently transformed the K ká zinci m a o N whole area into a more nature-like landscape. D Selská
á k c It is the very first anti-flood protection project un- i Kubatov n M ská a p ov e oup u bkou ča z dertaken by Prague that offers a unique soluti- D l Za Ka a i
á h p k o Vajdova C ic t on based on widening and naturalizing the water- Tesaříkova n obropolská o e D k á d Libkovsk u y h course channel. C K jezeru
Total remodelled length: 130 metres | The first revitalization anti-flood measures | Total costs: CZK 4,500,000 2009 Rekapitulace
Investor: City of Prague Department of Environmental Pro- tection of the Prague City Hall Investor‘s representative: Ing. Richard Polifka Removal of landfills
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague) Watercourse Department Representative: Ing. Ondřej Palička Eyot and access to water New pool in the berm DESIGNER: Aquatest a.s.
EXECUTION PERIOD: April 2009 – August 2009
TOTAL COSTS: CZK 4.5 million Widened channel at the higher flow rates
Removal of historical landfills and widening of the channel | Creation of ecological berm | Construction of pools | Replanting of vegetation 5 REVITALIZATION OF THE CIBULKA STREAM
y k v o The Cibuka Stream, which is the right-side tributary t š tlářce kova o Ke Ko hradníč P Za of the Motolský Stream, springs from a fountain benea- U á th the rocky outcrops of the Vidoule Nature Monument. It Plzeňsk flows through the woody landscape of the Cibulka area and continues along railway tracks before it flows into 2700
the newly restored Pod Dianou Pond. From there, it fol-
0 0 3 V bříz lows the road leading to wetlands below a cherry or- kách 550 chard, and at the statue of St. John of Nepomuk, it di- 500 revitalization sappears in an underground pipeline. The original pipe- u U tenis line led from the Homolka dry retention reservoir up to New pond Cibulka the Motolský Stream. y bulk The revitalization project was focused on the restora- U Ci tion of the historical pond, the stabilization of the sunken T r o
j d
m í channel and its unearthing in the vicinity of the Homolka íke l d Hlin n retention reservoir. The project followed up with the ini- Na á tial revitalization phase, which involved the restoration kem ámeč of the Pod Dianou Pond and the renovation of the consi- Nad z derably decayed culverts beneath the local roads. Where the channel of the Cibulka Stream sunk too deep, the bed was stabilized with the aid of steps built either of stone or of logs placed crosswise to the chan- Area of dry retention reservoir nel and firmly mounted into the banks. This way, the gra- New channel New pool before revitalization dual erosion of the channel was eliminated. According to historical records, a small pond was lo- cated above the statue of St. John of Nepomuk. Within the revitalization process, the historical water body was renewed by building a small pool with an overflow dike modelled to resemble a terrain fault. A part of the existing pipeline in front of the statue of St. John of Nepomuk diverts the stream away from this historical site and allows it to resurface near the dry re- tention reservoir. The newly built channel is 20–30 cen- timetres deep and its leads across the reservoir up to the dam where it flows into the Motolský Stream. Three smaller pools were built in the vicinity of the stream to li- ven-up the whole area. Overall, the project resulted in the extension of the channel of the Cibulka Stream and in the increased at- tractiveness of the Homolka dry retention reservoir, which had been used for recreational purposes rather scarcely until then.
290 metres of new water channels | 710 square metres of new water bodies | Construction of pools | Total costs: CZK 1,300,000 2009 Overview
Investor: City of Prague Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Jiří Karnecki
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague) Watercourse Department Representative: Ing. Ondřej Palička
DESIGNER: Restoration of the original pond Stabilization of channel with stone sill Ekotechnik-inženýring s.r.o. Ing. Jiří Jílek
EXECUTION PERIOD: April 2009 – July 2009
TOTAL COSTS: CZK 1.3 million
Restoration of the historical pond | Unearthing of the channel | Stabilization of the channel damaged by erosion 6 DALEJSKÝ STREAM – RESTORATION OF THE CATCH BASIN IN ŘEPORYJE
The catch basin on the Dalejský Stream may be found in Ve Výrech Street in the municipal district of Řeporyje. In the past, there were two small ponds on the site. The upper pond no lon- ger exists and the lower pond was rebuilt to serve as a catch basin. The main function of a catch ba- sin is to catch sediments coming from upstream. The sediments are deposited in the basin and do not silt up the channel further downstream. In or- der to function properly, the catch basin requires regular cleaning. The catch basin was built in the early 20th cen- tury and it was in a very poor condition. The ori- ginal stone walls were disintegrating, the outlet structure was damaged and the whole basin was clogged with mud. This led the watercourse ma- nager to a decision to completely reconstruct the whole basin. The stone embankment walls of the basin were repaired with the use of limestone, which was commonly used in the area. The discharge structure was rebuilt into a semi-circular over- Rough boulder ramp Catch basin with slide Overflow spillway with a slide Spillway construction flow spillway with a gradually declining slide. Next to the spillway, a new outlet structure was built along with an access for vehicles. The ori- ginal stone step above the basin – a remnant of the former upper pond – was taken apart and re- built into a rough boulder ramp. While the basin retains its primary sediment catchment function, it has been remodelled into a flow through pond. The project also involved the cleaning of the catch basin surroundings, liquidation of illegal waste dumps and removal of self-seeded ruderal vegetation, namely acacias. As a non-native tree, the acacia is considered an invasive species sup- pressing natural native vegetation. The project was closely linked to the previous phase, during which illegal waste dumps in Ve Výrech Street had been removed and the who- le channel of the Dalejský Stream had been clea- ned and remodelled.
Restoration of the catch basin | Total costs: CZK 3,000,000 2009 Overview
Investor: City of Prague Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Jiří Karnecki
CONTRACTOR: NAVIMOR – INVEST sp. z o.o.
DESIGNER: Ing. Jiří Hybášek Original step above the catch basin Original spillway Clogged catch basin EXECUTION PERIOD: April 2009 – August 2009
Cihelna Řeporyje Ve Výrech Da lej TOTAL COSTS: CZK 3 million ský
Koupaliště Řeporyje
cleaning of channel
Repair of the cacth basin
PN PROSLAD
ký čans Jino
Dalej 3l
Construction of the rough boulder ramp | Removal of illegal waste dumps | Replanting of vegetation in the stream surroundings 7 Dalejský CREEK – REMOVAL OF THE KLUKOVICE SWIMMING POOL
The Klukovice swimming pool was built in the 1930s as a part of the sun baths. The original woodless val- ley and the nearby train stop ensured abundant pre- sence of holidaymakers from Prague. Small depth, ap- prox. 1.1 m, very cold water and frequent clogging of the swimming pool by mud and stones gradually wor- sened water quality and, last but not least, the shading of the beaches ended the activity of the swimming pool in the 1960s. Since then, the entire swimming pool fell into dis- repair and up till now there have only been decaying concrete structures that have remained in the Dalej- ský Creek. In 2012 the flow manager decided to de- finitively eliminate the remains of the swimming pool and to return the natural look to the Dalejský Creek. In the spring of 2013 all concrete structures were knoc- ked down. The left crashed bank was cleaned up to the rock wall, the right one was settled and left in the natural state. As there is a playground next to the cre- ek, several gradual accesses to the water were crea- Gravel deposits Banks after concrete removal The new channel is tempting for the games Novo ted. After the flood in June 2013 the whole event was veská í rš completed by nature itself and several gravel benches v á n i Vs K é were created in the surroundings of the creek, which u v h o i i j N s K V became a pleasant amusement for the visitors of the K é v o playground. N
V
REMOVAL OF THE SWIMMING POOL Liščí
lí Kuní o d Z ú a é j k e s p č o í k S ro o P
j č K í Op atř ilce Ha ba rt ov Bu sk bl á V Kl av ukovic Historical photograph of the Klukovice ská ích
Do swimming pool Kl uko vic Lamačova
Length of the revitalization 125 m | Costs: CZK 1,000,000 2013 Overview
Investor: City of Prague, Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Jiří Karnecki
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague), Watercourse Department Representative: Ing. Ondřej Palička, Josef Richtera Demolition of the concrete fortification Revitalized natural channel The original concrete channel The original inflow to the swimming pool DESIGNER: Ing. Zdeněk Viták
EXECUTION PERIOD: January 2013 – March 2013
TOTAL COSTS: CZK 1,000,000
Removal of concrete structures from the creek | Cleaning the rocks | Adjustment of the surrounding banks 8 Hostavický Creek – Revitalization of Slatina
Another revitalization of the Hostavický Creek was carri- ed out in 2015 in Dubec above the Retention Reservoir Sla- tina in the length of 266 m. Originally there was a concre- ted channel of the creek, there were concrete steps and a gully holes. As a part of the revitalization the original channel of the creek was covered with a new, nature close, meandering channel which corresponds more to current demands for watercourses and nature conservation. Due to the fact that the rainwater from Mecholupy made floods above the re- servoir, a large berm with pools for the conversion of large waters was created there. Just above the place, where the channel flows to the Retention Reservoir Slatina, the revita- lization of the channel was terminated and the water spills into a small wetland. Revitalization was complemented by planting trees and shrubs and the whole berm was gras- sed over. The aim of this revitalization was to integrate the Hostavický Creek into the surrounding greenery and con- nect it to the Retention Reservoir Slatina. The project was co-financed by the Operational Program Deepening the pool Map of revitalization Prague – Competitiveness. Retention Reservoir U Start of modification p r a
v Slatina e n
á
y Slatin K lesíku
Revitalization of the channel
pools
Length of revitalization 266 m | Landscape modification of the Slatina Retention Reservoir | Costs: CZK 3,900,000 2015 Prague & EU: Overview We invest into your future, European Union European Fund for regional development
Investor: City of Prague, Department of Environmental Protection of the Prague City Hall Investor’s representative: Northern Pintail Ing. Jiří Karnecki, Ing. Martina Buchtíková
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague) Watercourse Department Representative: Ing. Ondřej Palička, Pavel Semecky
DESIGNER: The channel before revitalization The revitalized Hostavický Creek European Fire-bellied Toad
Ing. Jiří Hybášek Little Bittern
EXECUTION PERIOD: March 2015 – October 2015
TOTAL COSTS: CZK 3,900,000
Recovery of the floodplain | Creating organic berm | Construction of pools of the total area of 1,150 m2 | Vegetative treatment 9
Hostavický Creek – revitalization in Dolni Pocernice
The last revitalization of the Hostavický Creek was accomplished in Dolni Pocernice in 2015. With respect to the property law relations the revitalization was pro- posed in the length of 1.1-2.0 km from the Ceskobrod- ska Street to the confluence with the Sterboholsky Cre- ek. The stream served here ‘only for the transmission of water’ and its ecological, aesthetic and landscape value was minimal. The surroundings of the creek were mo- dified rather into a park with several children’s playg- rounds and forest with scattered greenery that was part- ly in a very poor condition, especially the vegetation of our non-indigenous Acer negundo with damaged stabi- lity. The aim of the revitalization of the Hostavický Creek was to integrate the watercourse into the surrounding greenery to increase the ecological, aesthetic and re- creational potential of the area. As a part of the revitalization the whole area was first cleaned up and a larger sunken area called berm was Pool Deepening a new riverbed Riverbed and pool Mapa revitalizace created. A smaller meandering channel of the Hostavic- ký Creek was modelled there. The small riverbed serves for normal flows, the berm serves for flood flows. The berm is grassed and integrated into the surrounding ter- rain in such a way that it gradually copies its surroun- Revitalization dings. The original riverbed was covered almost in a full of the riverbed length. A section where the watercourses are flowing into the creek was only left in the original route. Several pools small water bodies have been created around the creek especially for amphibians. A visitor can walk along the creek on new gravel roads through the entire area. The original footpaths across the creek were left here and allow access to the locali- ty from the Street V Zahorskem. Several benches were added along the paths and new play elements were pla- ced in the playground. The project was co-financed by the Operational Pro- gram Prague – Competitiveness.
Length of revitalization 1 126 m | Construction of the berm and the meandering channel | Costs: CZK 3,900,000 2015 Prague & EU: Overview We invest into your future, European Union European Fund for regional development
Investor: City of Prague, Department of Environmental Protection of the Prague City Hall Investor’s representative: Ing. Jiří Karnecki, Ing. Martina Buchtíková
CONTRACTOR: Stavby rybníku s. r. o. Ing. Martin Suchopár
DESIGNER: New riverbed Rocky slide at start of modification Sindlar, s. r. o.
EXECUTION PERIOD: The riverbed before revitalization The revitalized Hostavický Creek
March 2015 – October 2015
TOTAL COSTS: CZK 3,900,000
Extension of the riverbed by 248 m | Creating organic berm | Construction of pools of the total area of 706 m2 | Vegetative treatment 10 CHODOVECKÝ CREEK – STABILIZATION OF THE RIVERBED
The overall modification of the valley of the Cho- dovecký Creek took place in the mid-1970s in con- nection with the construction of the Southern Town. Three retention reservoirs were built on the creek. They are used to capture rain water in the territo- ry of the Southern Town – Chodov. By bringing ra- inwater into the creek the riverbed capacity increa- sed and the original natural riverbed had to be sta- bilized. Flagstones were used for fortification and the riverbed was straightened. This created too dif- ficult element in such a gentle environment and the nature has shown its disagreement with this treat- ment very quickly. In 2011 there were only a few stones left in the 2.5 m deep shore instead of the original fortificati- on. On both sides the entire valley was filled with soil and construction waste from the construction of the housing estates. Some of the trees are visible as they have been protruding from the concrete till now and they cannot be removed. Stabilized riverbed Enlargement of the riverbed under the outflow of the rainwater drainage Newly modified pool á The creek was newly stabilized by a heavy equa- Bojanovick
C
á h torial stone (so-called alpine treatment), which al- usick Hr o r C a hocera lows to create a stable but close to nature riverbed t dsk i á avní c Hl k with pools and little weirs. Compared to the classi- á
á cal fortification there is much more water in this cre- ělčick S B p River bed cleaning ek, which is oxidized in the little weirs and the pools oř ká ilo ojšovic Ma v Sv lov s ick serve as a home for many aquatic organisms. The ká á
surroundings of the creek were cleaned and new á
L k e c š i trees and wetland vegetation were planted here. J a p i á ž n řovsk u a t n s Struh k s í I á o
P
o J S J i h i ž é e ž n k n á n í REVITALIZATION sk s o ín í I v Mil I h I I o I r r b a O b
s VI k chodní á Jihový ova pálk Kla Č Extention of the river e n bed under the outflow ě t U i c á z Jihovýchodní IX á k k á b á s sk ě
v v ká šo h s o i l ov iv ic
rkova bl n D k ü r T Ke é e h t o
Š z á á sk m žim k Bla u nu U stoja Revitalized length of 256 m | Stabilization of the creek riverbed | Costs: CZK 1,300,000 2011–2012 Overview
Investor: City of Prague, Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Richard Polifka
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague), Watercourse Department Representative: Ing. Ondřej Palička, Zdeněk Baloun Newly stabilized riverbed Erosion depth of the riverbed Original mouth of the creek Demolition of the damaged fortification DESIGNER: Ing. Cyril Mikyška
EXECUTION PERIOD: June 2011 – July 2012
TOTAL COSTS: CZK 1,300,000
Stabilization of the damaged riverbed by a heavy stone layer | Construction of pools on the creek | Clean-up of the creek surroundings 11 REVITALIZATION OF THE KOŠÍKOVSKÝ STREAM
The Košíkovský Stream flows into the Botič Stream from the left side below the Hostivař Dam. During the construction of the Chodov housing estate, the upper part of the stream was diverted into an underground pipeline and connected to the storm sewer system. In the section between Mírového hnutí Street and the retention reservoirs, the stream channel was pa- ved with stones laid in concrete. The vegetation that eventually started growing in the channel (i.e. self-revitalization) returned an al- most natural character to the Košíkovský Stream. De- spite its relative massiveness, the lining of the chan- nel, especially in the section of two steps and the pi- peline mouth, was of poor quality and thus frequent and extremely high flow rates led to the destruction of the steps, as well as the surrounding bed. Moreover, the extent of the damage was continuously growing. In order to stabilize the channel, the manager of the watercourse carried out repair works with the use of revitalization elements. The area around the pipe- Stream after revitalization General map Damaged concrete lining line mouth was newly paved with interlocked stone paving. The upper step was completely removed and
replaced with a rough boulder ramp. The lower step N
a Berlínská E d l Č á i K š e k was also removed and the channel was remodelled o k
n s y š ě D ž i í t J k
á o i R c u e
k á u sk k v m á U n and widened to create a flow through pool. s la k p s á s á ati k v v r z o B o k š á o o i v iv b s v
n D s ě n
r é h k
é Hydrophilic plants were planted in the surroun- e l á
t i c h t u ká Š k ík s é A oš im h kám K dings of the pool. In case of a straightened trapezoi- laž o Hor Na B z K á m k u dal channel, such elements play a crucial role in the K n o v í K segmentation of the watercourse and thereby in in- z
s o k b á á e sk Revitalization c creasing the environmental and aesthetic value of the el n š í Py m
h á stream. The revitalization project also included clea- ho j ské o ajer v tí M n nu á o h m ning of both reservoirs where, in addition to excava- éh rov ting mud, minor repairs of various objects were carri- Mí Samohelova ě n ír č á ed out, as well as the renovation of the channel abo- o t a h s v é e H
k ek o Leopoldova K rov k s a ve the confluence with the Botič Stream. The who- n d
e o
a D r
v B u
B B o b r n Piš těk e n le project was finalized with extensive planting of wo- í ova
c o n h v u t o a K Donovalská le ody and wetland plant species in and around the re- ská v e a K ova servoirs. Matúšk
Remodelled length: 390 metres | Replacement of lined channel with pool | Total costs: CZK 3,400,000 2007 Overview
Investor: City of Prague Department of Environmental Pro- tection of the Prague City Hall Investor‘s representative: Washed-out „hard“ lining Ing. Richard Polifka
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague) Watercourse Department Representative: Ing. Ondřej Palička New pool in the stream Rough boulder ramp below the pool DESIGNER: Atelier životního prostředí (Environmental Studio) Construction of the pool Ing. Cyril Mikyška Rough boulder ramp
EXECUTION PERIOD: April 2007 – November 2007
TOTAL COSTS: CZK 3.4 million
Reconstruction of step to the rough boulder ramp | Renovation of paving | Building of small pools | Replanting of vegetation 12 REVITALIZATION OF THE KRuTECKÝ STREAM
The Krutecký Stream is the right-side tributary of the Litovecký and Šárecký Stream. Its catchment area is situated on the southern slope of the valley of Šárka between the Džbán open air swimming pool and the Vltava River. The whole territory is a part of the Šárka-Lysolaje Na- ture Park and its most valuable sections have been declared a small-si- ze protected areas. In this location, the Krutecký Stream may be divided into two chara- cteristic parts. The first part (upstream wise) began at a culvert under a local road between a gardening colony and Horoměřická Street and it continued down a 100-metre long concrete channel. The second part, which is approximately 160 metres long, led through a concrete chan- nel between Na Krutci Street and a ruderal meadow with illegal was- te dumps. Due to the unfavourable condition, the Department of Environmen- tal Protection decided to revitalize 260 metres of the Krůtecký Stream. All concrete gutters were removed from the first part of the stream and moderate bends were created on the channel between the forest path and the local road. The remains of the old straight bed were inte- grated in the new channel only in the form of several small pools. In the second part, the route of the channel was modified to allow Pool in the Krutecký Stream after revitalization Stream crossing the stream to once again meander along the valley line.. From the out- let structure, up to which a part of stream flows in an underground pi- Nad Dubovým mlýnem U Vizerky peline, the channel was diverted into the middle of a meadow to enable bet D N 40 0 the meandering of the stream in a close-to-nature manner. In the cen- V Šárec kém údolí tral part, a small area with wetland and a 90 m2 pool with a maximum depth of 0.5 metres was created. With a view to the number of self-se- eded ashes and maples on the meadow, the new route of the channel was adjusted to the existing young tree stand. In order to prevent the possible destruction of the new channels, the bends were reinforced with rubble. The banks of the new stream
N a ka were planted with wetland vegetation and gravel crossings were built d liv J Že e n e at the bend transient points. The project also included the reconstructi- rá l k N ná V už o N L o u a a k Č on of the damaged pipeline outlet structure and the drainage of the lo- o k Na krutci e v O ř í r i d c v n k l á e é á l o cal road. The original channel of the Krůtecký Stream was preserved in h v á á o ř k H c e this section so it would serve as a roadside ditch leading into the wa- ru o 400 r N b o u D é m o h v a T m u o k r r ě k ne tercourse. tt ř V u i S c k This revitalization was the very first project of the natural revitalizati- á on of streams carried out in Prague.
Length of new channel: 250 metres | The first natural revitalization in Prague | Total costs: CZK 650,000 2005 Overview
Investor: City of Prague Department of Environmental Protection of the Prague City Hall Construction of new channel Investor‘s representative: Ing. Jiří Karnecki
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague) Watercourse Department Representative: Ing. Ondřej Palička Stream meanders Krutecký Stream before revitalization DESIGNER: Ing. Jiří Hybášek Krutecký Stream before revitalization EXECUTION PERIOD: May 2004 – July 2005
TOTAL COSTS: CZK 0.65 million
Filling of the original concrete channel | Building of the new close-to-nature channel | Building of small pools | Replanting of vegetation in the stream surroundings 13 UNEARTHING OF THE LITOVICKo-ŠÁRECKÝ STREAM NEAR THE HVĚZDA GAME PRESERVE
The source of the Litovicko-Šárecký Stream may be found in the district of Prague-West, approximately 1.5 kilometres to the west of the municipality of Chýně. It flows through the Baš- ta Pond and continues through the Břevský, Kalu and Litovic- ký ponds to the town of Hostivice. The stream then flows throu- gh the Strnad retention reservoir situated in the eastern part of the cadastral territory of Hostivice. Just before the Jiviny reten- tion reservoir, the stream enters the territory of the capital city of Prague in the district of Ruzyně. From there, it flows to Li- boc where it feeds the Libocký Pond and it continues via Vo- kovice to the Šárka-Lysolaje Nature Park where it flows throu- gh the Džbán water reservoir. The Litovicko-Šárecký Stream flows into the Vltava River near the east end of the nature park. In the 1960s, a massive project was launched, the aim of which was to divert the Litovecký and Šárecký Stream into a underground waterway leading under the Ruzyně Prison and all the way up to the Hvězda Game Preserve. The revitalized part of the stream begins at the mouth of the former underg- round waterway in the vicinity of the intersection of Ruzyňská and Stochovská streets. The underground waterway originally led under a green belt between the game preserve walls and Ruzyňská Street up to the intersection of Ledecká, Ruzyňská Newly remodelled Footbridge to Hvězda Original channel prior to construction and Jinočanská streets. The underground waterway was of a channel Game Preserve of underground waterway 3 by 1.1 metre rectangular profile with an approximate width of
L P ito Ryb ničná o 0.5 metres. It was built of U-shaped armoured concrete frames vi c d e ardenská á ká Na c k i R
s n y
covered with armoured concrete panels. v a t b
o
n
l s
i
v U č
a As a result, one of the major streams of Prague was ultima- n
P o Libocký rybník tely degraded by the underground waterway to a lifeless sewer u U Prioru V d á om without any aesthetic or environmental function. k Únětická cíc c h
e Sestupná
d S
o b Therefore, the Department of Environmental Protection of r II Mladotická í á h B K av e íh a Ú Sb v N k z á the Prague City Hall decided to execute a project aimed at the K á o k a k s á ic n I vn L te o ko ě Ra e l k ž u d r complete revitalization and unearthing of the Litovicko-Šárec- e a e v j S c i e á k o sk s Ve Hvězdě Li ov á bo ký Stream along the Hvězda Game Preserve. b och k cká í St á n
s k The project involved the unearthing of a 280-metre long se- á ká yňs Ruz ction of the stream. The original concrete waterway was remo- P Unearthing of the ř í l e channel ved along the whole length and the newly uncovered channel p s á k sk á R oun was remodelled in a close-to-nature manner. The bed and the ač L ick á á nsk banks of the newly uncovered channel are stabilized by rub- oča Jin ble, as well as occasional vegetation lining. Alders and willow ízská O obrov bo Kralupská D ra Hvě scrubs were planted along the banks and a new footbridge al- zda ou vk Hube ano rova lowing access to the Hvězda Game Preserve was built below d M Na the existing bus stop. Pod mohylou
Length of new channel: 280 metres | Unearthing of the channel | Total costs: CZK 10,000,000 2009 Overview
Investor: City of Prague Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Jiří Karnecki
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague) Watercourse Department Representative: Ing. Ondřej Palička Demolition of concrete waterway Newly remodelled channel Stream before unearthing DESIGNER: Demolition of the original and building Ing. Jiří Hybášek of the new channel
EXECUTION PERIOD: August 2009 – December 2009
TOTAL COSTS: CZK 10 milion
Removal of concrete waterway | Building of new close-to-nature channel | Lining of the channel with rubble | Replanting of vegetation 14 Litovicko-Šárecký CREEK – REVITALIZATION IN FRONT OF THE Ruzyně PRISON
The revitalization of the Litovicko-Šárecký Creek conti- nued in the park in front of the Ruzyně Prison in 2011. His- torically, there used to be a pond. In the 1960s the riverbed was straightened and concreted into a trapezoidal shape which resulted in the separation of the water element from the adjacent park. In addition, under normal flow conditi- ons approximately 5 cm of water flowed down the bottom of the creek, which is wholly unsatisfactory for aquatic fau- na and flora. As a part of the revitalization the original concrete river- bed was demolished and the creek, as well as the Hvěz- da Game Reserve, were stabilized by a heavy stone layer. Deep and shallower bundles were formed in the bottom, so that even under low flow conditions there was plenty of wa- ter in the riverbed. In order to interconnect water and the surrounding gree- nery the left bank was reduced in several places and a gra- dual access to water was accomplished. Several stones for sitting were placed on the shore. The revitalized riverbed was planted with wetland vegetation. The entire project con- Newly modified riverbed A stony riverbed with plenty of water and shelters tributed to the acclimatization of the whole area and retur- ned life to Litovicko-Šárecký Creek in this area. D r n o v s k á ická ovn Rak
S
o
b
í n á s k ovs k och á St
ká yňs Ruz á S acen ta Ztr te R ni a ck čic á ká ká ans S oč t in a J r é ká vízs n obro REVITALIZá ATION Kralupská D m Unhošťská ě Chom s uto t vsk
í á
á
k
c i Netřebská l lou e hy ř mo o Pod
N H u o a Z a humny k v J á o i k v s ň n u m i za š n u o i b e Z k v á v v c M d ožného o t o a h V i ýtvarn Ka á n N r b lo a v ř arsk á h M The Litovicko-Šárecký Creek in front of the Ruzyně Lišanská d d
o a Prison, on the site of the former brewery P N
Revitalized length of 120 m | Revitalization of the concrete riverbed | Costs: CZK 4,400,000 2011 Overview
INVESTOR: City of Prague, Department of Environmental Protection of the Prague City Hall Investor’s representative: Ing. Jiří Karnecki
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague), Watercourse Department Representative: Ing. Ondřej Palička, Vladimír Denis Demolition of the concrete riverbed Newly modified riverbed Creek before revitalization Creek before revitalization DESIGNER: Aquatest, a. s.
EXECUTION PERIOD: August 2011 – November 2011
TOTAL COSTS: CZK 4,400,000
Removal of the concrete fortification of the creek | Construction of a new nature close riverbed | Stone fortification of the creek bed 15 Litovicko-Šárecký CREEK – REVITALIZATION OF THE THREE LOCALITIES IN THE Šárecké VALLEY
Another modification of the Litovicko-Šárecký Creek was ac- used for the millrace and the creek was converted back to the complished in 2012. The creek was revitalized in three localities 650-meter-long floodplain. Once again the meandering riverbed in the Šárecké Valley. The properties owned by the City of Pra- was created there with respect to the most valuable parts of the gue were selected for the revitalization. Prague – Žežulka locati- floodplain. The completion of the revitalization consisted of five on, Zlatnice and Jenerálka localities in the total length of 620 m of pools, some of them are connected through the drainage directly the original riverbed. with the creek. The original riverbed was left there to improve the In the locality of Žežulka the creek was historically pushed out flow of flood flows off the area. Water is driven to the revitalized to the edge of the valley wetlands below the forest and it was com- and original channels by a distribution object made of large boul- pletely separated from the extracted sediments from the nearby ders. In this locality the depth of the new riverbed was given by meadows. The meadow was regularly sown and mulched and was the passes under the road at the inflow and outflow from the revi- not valuable from the botanical point of view. Approximately in its talized area. half it was divided by the waste from the historic buildings. The remains of the original millrace were covered and, thanks The creek was converted to the centre of the meadow and mo- to the clearing of the edge of the adjacent forest, the water, mea- delled as a nature close meandering creek with pools and fords as dow and forest environment have been interconnected. To make a part of the revitalization. Prior to returning the creek to the origi- the revitalization more attractive for the visitors, a grassy footpa- nal basin it was divided into two parts in order to improve the flow th was built through the middle of the meadow and a wooden foot- of the area. The shape and depth of the riverbed was based on the bridge across the creek. Based on the recommendations of bota- assumption that the revitalized riverbed should not moist the sur- nists a part of the valley will be regularly mowed to allow the desi- A new footbridge across the creek rounding meadow because it was used for recreational purposes rable development of rare plant species. by residents. For better recreational use and maintenance a small The third location Under Jenerálka was the least affected by a Map of Litovicko-Šárecký Creek in the area wooden footbridge was built in the upper part. human activity. Although the creek was historically pushed to the of the Džbán Reservoir from 1848 The original riverbed was covered with soil that was excava- edge of the valley of the floodplain, due to its long-term use the ori- ted during the construction of a new riverbed. During revitalization ginal meadow changed into reed and the creek began gradually to it was necessary to preserve as much as possible of the valuable meander. The target of the revitalization was to support the natural and locally native trees, and so the creek riverbed could better fit winding of the riverbed and create several pools in the locality. A into the new environment. part of the revitalization also included a revitalization of the Krutec- At Zlatnice the creek originally copied the road in the Šárec- ky Creek, which was converted from the original concrete channel ké Valley and was put between the road and fences of family hou- along the road to the floodplain, where it flows with other springs ses. Because of the confined conditions the creek was fortified by and flows into the Litovicko-Šárecký Creek. Subsequent care for stone or concrete walls. On the other side of the road there was the floodplain will be based on the overall subsidence of the site. Flood area of current tall reed with fragments of valuable floodplain meadows and rem- The goal is to keep the mowing of the meadow on regular basis. reservoir Dzban nants of an old millrace. Due to the significance of the locality a Management will be based on the experience from the first year botanical survey was carried out before the start of the works (Re- of revitalization. Meandring river bed of Litocko-Sarecky Creek zac 2012). The 11 kinds of plants from the red list were found here, Completed revitalization was hit by flood in June 2013, which such as hoary willow herb (Epilobium parviflorum), Berula erec- corresponded to a five-year flood. At all three localities water ta, Scrophularia umbrosa, Carex cespitosa or greater pond sedge spilled into the floodplain and thus forming process of the riverbed (Carex riparia). started. Gravel fords and floodplains were created and the pools When the revitalization was planned, the original passes were were formed there.
Extension of the channel by 730 m | 1 000 m2 of new water bodies | Costs: CZK 3,700,000 2012–2013 Overview
Investor: City of Prague, Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Jiří Karnecki
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague), Watercourse Department Representative: Ing. Ondřej Palička, Pavel Semecký Gravel deposits New meander Map adjustments – the Žežulka locality Construction of the new riverbed DESIGNER: Šindlar, s. r. o.
EXECUTION PERIOD: September 2012 – May 20133
TOTAL COSTS: CZK 3,700,000
new pools REVITALIZATION
The original route of the stream chanell new pools
Length of new river bed 197 m | New forrest pools construction of the area of 25 m2 | Covering of the original river bed | Vegetative adjustments 16 Meadow before revitalization
New river bed Map of adjustments – Locality Zlatnice Blooming meadows along the creek Pasture – maintenance of meadows
new pools
The original route of the stream chanell
REVITALIZATION
new pools
Length of the new river bed 650 m | Construction of 7 new pools on the area of 440 m2 | Construction of pass New pools Map of adjustments - Locality Jeneralka Blind stream branch New pool
The original route of the stream chanell
new pools
REVITALIZATION
The original route of the stream chanell
Length of the new river bed 117m | 3 new pools construction on the area of 568 m2 | Remaining a part of the original river bed as a blind stream branch Motolský CREEK – stabilization of the riverbed
The Motolský Creek springs in Stodulky and flows into the Vltava River at the Palacky Bridge. The spring of the creek is located near the Zlicin underground station under the com- mercial and shopping area. Out of the total length of 9.9 km the lower part is totally covered part in the length of 4.2 km and the upper part is partly covered in the length of 5.6 km. The main tributaries of the Motolský Creek include the Broken Brook and the Cibulka Creek. On the stream there are five ponds and two dry retention reservoirs Homolka and Tatra Zli- cin, which are used for capturing torrential rain. In its upper part the Motolský Creek flew through an open channel in the recent past and it was covered only at the in- tersection of the roads. With the development of transport and increasing requirements for building sites, in the first half of the 1980s almost half of the route of this upper part of the ri- verbed was unfortunately gradually covered. The constantly open part of the creek is therefore outside the spring part, only from the Motol Ponds to the Cibulka Pond. As a part of the construction of the Motol Ponds the river- bed of the Motolský Creek was straightened and fortified by New stone fortification Newly modified riverbed Newly modified riverbed the stone pavement. At normal flow rates, only a few centime-
U H tres of water flowed in and the creek was degraded to the me- omolky Wolfova a v lo u K lioration channel. During the local floods in 2011 several parts k u Bedrnova u d K rn á o y u k v k Hamsíko al rs a š va of original fortifications were devastated. v o u ú h r V d h o P U a ov In 2012 the surroundings of the Motol Ponds were revitali- a er v nn o e ova N l H Brdlík P a H y o o e zed and the damaged parts of the original fortifications were d H mo om lce D Z olk ahradn tupní ou replaced by the boulders that laced the channel. A set of small íčkova Vs V 300 DN 300 p ř 200 e pools and ponds were created there and even at smaller flow l o m u 950 500 rates the riverbed is full of water. This method of fortification 2200 of riverbeds has become more and more popular in recent ye- 200 REVITALIZATION ars and there is a high level of satisfaction with this. In contrast Plzeňská REVITALIZATION
a
v
o to hard fortifications (concrete, stone paving) large boulders r a
h
c
u adapt better to the riverbed and are much more resistant to B
550 m flood flows. Another advantage is that the riverbed is not smo- e k í
n i l
H oth and is therefore more suitable for aquatic animals, even d
a under the low water conditions. The fortifications do not dama- N ge trees that grow in the vicinity of the creek.
Length of a treated riverbed 300 m | Revitalization and stabilization of the creek riverbed | Costs: CZK 660,000 2012 Overview
Investor: City of Prague, Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Jiří Karnecki
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague), Watercourse Department Representative: Ing. Ondřej Palička, Construction of the new fortified riverbed New riverbed The original paved riverbed Vladimír Denis The original damaged riverbed
EXECUTION PERIOD: January 2012 – March 2012
TOTAL COSTS: CZK 660,000
Removal of damaged fortifications | Cleaning the riverbed | Stabilization of the riverbed with heavy stones | Construction of pools in the riverbed 17 Nebušický Creek – revitalization under the Nebušický Pond
The Nebušický Creek springs in Nebušice just above the village square pond (formerly a fire tank). In the surroundings of the pond the creek is hidden in a pipeline and comes back to the surfa- ce in the Street Pod Hláskem. Approximately after 250 m, thanks to the permeable subsoil, the water in the creek disappears and appears in the Nebu- šice Retention Reservoir under the sewage treat- ment plant. It flows together with the Litovicko-Šá- recký Creek under Jenerálka where it enters the private Pond Dubak. Due to the development of the new sites and the increase of the proportion of paved areas in Nebušice, the rainwater that flows into the stre- am has increased significantly in recent years. Because of the unstable subsoil, the erosion and recession of the riverbed have soon followed. At some places erosion ridges reach up to 2.5 m of the erosion groove. Some private parcels in the neighbourhood were also threatened. Outflow from the pipeline Construction of the fortification A new riverbed Within the revitalization, the Nebušický Pond was stabilized by a 120-meter-long channel with a heavy stone level, so-called mountain treatment, that is increasingly used in Prague and there is a T uchom positive experience with it. The erosion grooves ěřická K vod were covered with clayey soil and treated with ge- árně otextile in order to avoid further subsoil excava- tion. K cíli K onco u A part of the project also included the regulati- v n REVITALIZATION o á l á DN em m 1000 sk o e lá k vinic ě K H š U s od K P t H on of the riverbed over the Nebušický Pond. The í u e o P s l a v t á S r s d á o ži N p k l k n ova ý dvard o u a E c c i stream was originally stabilized by the gutters. Stabilizationj d V P h o o p n d o o s v r ta a h h ro á P u r l é š i k žá of theko damaged riverbed c n s lo ím u e o c i v i This neglected area was revitalized into a recre- l š o P n r i á t a v h c i á K c A v y i h m u o n Prů S ě N hon h o e r ská kác s N bu v ulič d N a n ši e ational park. The riverbed of the creek was cle- V í t d ck o ř o v á n T a s l v ý o d o s a p k k á k k o á u s K o l o K s Ho aned, the gutters removed and replaced by the e Vize rno N rc fo e U va u
K hradě o V o k v stone fortification and stability thresholds. The left V i březi l nkác e h Ž
d bank was modified in several places to access the V sídlišti a L N o V v Pac U e hman c c e P B water. There was a small pond nearby. k D o r á a u je h bo n b d á o o d o h věji d hé e v a zá ru N k j D s á y o v a
Length of modification 130 m | Stabilization of the channel under the Nebušický Pond | Costs: CZK 1,200,000 2014–2015 Overview
Investor: City of Prague, Department of Environmental Protection of the Prague City Hall Investor’s representative: Ing. Jiří Karnecki, Ing. Martina Buchtíková
CONTRACTOR: Nowastav, a. s. Representative: Ing. Daniel Grosman Isolation of the bottom of the new riverbed A new riverbed The original riverbed DESIGNER: New fortification of the riverbed Ing. Zdenek Viták
EXECUTION PERIOD: November 2014 – May 2015
TOTAL COSTS: CZK 1,200,000
Stabilization of the damaged riverbed by a heavy stone level | Pool construction on the creek | Gradation of shores 18 REVITALIZATION OF THE ČIHADLA DRY RETENTION RESERVOIR
The revitalization of the stream channels in the area of the Čihadla dry retention reservoir is the largest and the most extensive close-to-nature project aimed at re- vitalizing watercourses in Prague and its surroundings. The Čihadla dry retention reservoir was built in the 1980s and its primary function is to retain storm rainfall from the Rokytka catchment area. The reservoir is built on the site of a large pond, which had served its purpo- se until the 18th century when it was gradually drained and transformed into agricultural land. Within the construction of the dry retention reser- voir, the channels of the Hostavický, Svépravický and Ro¬kytka streams from their confluence with the Hosta- vický Stream were straightened and lined with concre- te blocks. Since the whole area is designated for the spreading of flood water, the straightening and lining of the channels was purposeless and it only depreciated the value of the location, which is a part of the Klánovi- ce-Čihadla Nature Park. The revitalization process began with the filling of the old, high-capacity channels lined with concrete, and it continued with the excavation of new, close-to- nature channels that would be shallow and meande- Vegetation in the new pool Original straightened channel of Rokytka ring. Small pools were created at the crossings of the new and old channels. The banks of the pools have gradually declining, as well as steep banks to allow the development of fauna and flora. Additional ponds were built from a part of the original channel of the Rokyt- ka, particularly at locations where tall trees are growing from the bed. In addition, new footbridges across the streams were built and information boards dedicated to revitalization and protection of the environment were installed as a part of the project. The new channels were planted with 200 young tre- es, namely alders, ashes, maples and oaks, as well as with shrubs solely from our native woody plants, such as black thorns, guelder roses, spindle trees and wil- lows. The pools and certain sections of the channels were also planted with wetland vegetation, e.g. irises, Original straightened loosestrifes, and various grass species. channel of Rokytka
The second largest revitalization project in the Czech Republic | Total costs: CZK 17,100,000 2007–2008 Overview Aerial view of dry retention reservoir
Investor: City of Prague Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Jiří Karnecki
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague) Watercourse Department Representative: Ing. Ondřej Palička
DESIGNER: Ekotechnik-inženýring s.r.o. Ing. Jiří Jílek
EXECUTION PERIOD: July 2007 – April 2008 ▼ Dry retention reservoir during 2002 floods TOTAL COSTS: CZK 17.1 million
Construction of new close-to-nature meandering channels | Construction of pools | Planting of wetland vegetation, trees and shrubs 19 REVITALIZATION OF THE ČIHADLA DRY RETENTION RESERVOIR
Rough boulder ramp The use of vegetation lining along Construction of new channels Gravel bed layer New meander of Rokytka the banks Footbridge over the stream
Total length of new channels – 1 605 metres: Svéprávický Stream 1132 metres, Rokytka Stream 200 metres, Hostavický Stream 273 metres Project The project was co-financed from the eu structural funds (JPD2) and funding by the ministry of regional development
The pool with frog bit
New pools with wetland vegetation Aerial view of the pool Life in a pool
The pool with pondwort The pool with floating heart
Total revitalized area – 27 hectares | Total area covered by new water bodies – 7 800 metres ROKYTKA – MODIFICATION OF THE CHANNEL NEAR Hořejší POND
Rokytka near the Hořejší Pond has undergone many major changes in the last century. It originally flew directly through the Hořejší Pond. In 1961 a divi- ding dike was built and the pond was rebuilt to the side pond, as a part of the reconstruction of the pond and the natural swimming pool. To fill the pond a stage was built on the basin and the riverbed was paved. Down the stream an experimental hydrostatic weir, called the Jermaruv weir, was built. The Rokytka riverbed was converted and concreted into the shape of a trapezoid under the pond within the construction of the Prumys- lova Street. As a part of the revitalization of this part of Rokytka the remains of the non-functional Jermaruv weir and the accompanying concrete structures were removed. The height difference of the channel above and below the weir was solved by a boulder slip. The boulder slip also replaced the original step of the pond. Both slides are accessible for fish that occur in Rokytka. The concrete riverbed under the pond was knocked Rocky slide Stabilized riverbed Stabilized riverbed down and replaced by a heavy rock boulder, so-called alpine treatment. The bottom was left natural with mo- saic seated stones and stone thresholds. Thus a natu- re close and steady riverbed was built which provides space for living of aquatic plants and animals.
REVITALIZATION
Replacement of concrete steps
Length of adjustments 1 060 m | Replacement of concrete steps with boulders | Costs: CZK 9,000,000 2012–2013 Overview
Investor: City of Prague, Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Jiří Karnecki, Ing. Martina Buchtíková
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague), Watercourse Department Representative: Ing. Ondřej Demolition of concrete fortification New rocky slide Original concrete step Palička, Vladimír Denis Rocky fortification construction
DESIGNER: AŽP – Ing. Cyril Mikyška
EXECUTION PERIOD: September 2012 – December 2013
TOTAL COSTS: CZK 9,000,000
Stabilization of damaged river bed by heavy rocky bowlders | Removal of concrete fortification | Surrounding banks clean up 20 ROKYTKA – REVITALIZATION OF THE CHANNEL BELOW SMETANKA
Rokytka also experienced significant changes un- der the hill of Smetanka. Historically there was a me- andering riverbed and even a millrace. In the 19th century Rokytka was there and the surroundings were covered. The shores then overgrown by impassable clusters of the acacia. The revitalization in this part of Rokytka included the removal of landfills, extension and division of the riverbed and creation of the organic berma. Two small islands and one kingfisher wall were built in the ba- sin. They have often occurred in this area but did not have suitable nesting conditions. Several trunks from the surrounding felled trees have been inserted and stabilized the creek. They will serve as dead wood in the water, which is a very important part of aqua- tic ecosystems. Thanks to this the illumination aqua- tic vegetation have appeared in the creek, for examp- le watercourses. A part of the revitalization was modification of the confluence of Rokytka and Mala Rokytka where up to Newly modelled riverbed Small Rokytka Modelling the shores 2 m of landfill was removed and a pleasant access to water was created. Thanks to the revitalization measure Rokytka has become a part of the urban recreational greenery in this area. At many places it is very convenient to come down directly to the water surface. One of the islands was immediately occupied by children as pirates of Hrdlorezy.
úprava koryta
Length of revitalization 530 m | Channel extension Costs: CZK 2,500,000 2013 Overview
Investor: City of Prague, Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Jiří Karnecki, Ing. Martina Buchtíková
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague), Watercourse Department Representative: Ing. Ondřej Modelling the shores A new rugged riverbed The original riverbed Palička, Josef Richtera Clearing banks from self-seeded trees
DESIGNER: Šindlar, s. r. o.
EXECUTION PERIOD: July 2013 – November 2013
TOTAL COSTS: CZK 2,500,000
Ecological Berma Contruction | Clean-up of the surrounding banks | Dumping and landfill 21 Rokytka – Revitalization over the Hořejší Pond
The Rokytka riverbed over the Hořejší Pond was straightened at the beginning of the 20th century and the shores were plan- ted with almonds and pear trees. Due to the long-term neglected maintenance, however, they grew up along with raid vegetation. The Rokytka riverbed itself was degraded into a channel for the drainage of fast water. The bottom of the creek lacked fragmentation and the left bank was inaccessible, completely devastated by large nutria colonies. The entire riverbed of Rokytka over the Hořejší Pond was transmitted into meadows on the left bank within the revitalization. The target was to create a nature-friendly, winding and shallow riverbed as it looked before the regulation. In order to maintain the growth of the capacity profile, about 20 m wide berm was formed in the middle of the meadow and Gradual shores the new riverbed was formed. Several small The revitalized Rokytka riverbed Deepening a new riverbed Map of revitalization attract to the water water bodies were created in the curves and a place, where a perpendicular wall for the Kingfishers was to be built, was found. Du- ring the construction of the berm it was found out that the entire meadow was fouled to 1.5 m height in the past. Apparently, it was silted up with mud from the Hořejší Pond. pools The original Rokytka riverbed was cove- red. To increase the protection of the sur- Revitalization of the riverbed rounding properties, the meadow near the building was increased by about 0.7 m. As a part of the project there was a cycle path around the mill constructed. All in all, the connection of the aquatic en- vironment and the surrounding area have be- come more attractive.
Length of modification 518 m | Creating a new nature close channel | Costs: CZK 9,700,000 2014–2015 Overview
Investor: City of Prague, Department of Environmental Protection of the Prague City Hall Investor’s representative: Ing. Jiří Karnecki, Ing. Martina Buchtíková
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague), Watercourse Department Representative: Ing. Ondřej A new meandering riverbed Area before revitalization Palička, Josef Richtera A new riverbed during the construction
DESIGNER: Šindlar, s. r. o.
EXECUTION PERIOD: April 2014 – April 2015
TOTAL COSTS: CZK 9,700,000
Covering the original channel | Construction of pools, cycle paths and protective dams Restoration of the pear trees | Construction of a „loggery“ 22 Řepský CREEK – Revitalization of the Creek
It took time to realize that revitalization of the Řepský Creek was very demanding. The first obstacle to the project that lasted several years was the construction of the Prague orbital which did not inclu- de the Řepský Creek. The solution was found in 2006 when the slip road from the Karlovarska Street was built. During the construction of the drainage of the road the interconnection of the ditches with the rainwater sewer system was successfully introduced, leading further to the Litovicko-Šárecký Creek. Thus, the access to the Řepský Cre- ek was opened and the first stage of the project could start. It was the connection of the drainage water, which flew into the detention basin Repy III, then continued directly into the riverbed of the Řep- ský Creek, and cleared the channel along the allotment. In 2010 another part of the revitalization took place. It consisted of ploughing the Zalansky Street and the connection of the drainage water from the existing rainwater sewer system into the Pond Pise- cak. During the excavation there was an interesting moment from a historical perspective when the drainage monument of the monaste- ry was historically discovered. The last stage of the revitalization, which started in the area of the Lake Hlinik and led to the Penny Market, was again suspended for several years due to a complex and unsettled property-law relati- ons. All necessary authorisations were obtained in 2012 and a year New riverbed and pools later a building permit was issued. The aim of this last part of the project, which was carried out in 2014, was to bring water from the lake Hlinik under the railway line and the Street Na Chobote to the area above the Penny Market. The creek appears on the ground le- vel for the first time there and as a small natural creek it flows throu- gh greenery under the housing estates to the Penny Market where River it is hidden in the pipeline once again. Initially there was an equip- bed cleaning ment for the construction site of Repy settlement at the place of re- vitalization. Because of the excavation of the new riverbed, various building remains, panels and burdens were revealed. First, the cor- ridor for the new creek had to be excavated and backfilled in a wid- th of about 3 m. After that the riverbed could be dug. It was then sta- Creek renewal bilized with gravel. Several small pools were built along the creek and the opened ri- verbed is planted with trees and wetland vegetation.
Length of revitalization 707 m | Renovation of the disappeared creek | Costs: CZK 2,600,000 2010–2014 Overview
Investor: City of Prague, Department of Environmental Protection of the Prague City Hall Investor’s representative: Isolation of the new riverbed Ing. Jiří Karnecki, Ing. Martina Buchtíková
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague), Watercourse Department Representative: Ing. Ondřej Area before revitalization Palička, Vladimír Denis
DESIGNER: Deepening the new riverbed Ing. Jiří Hybášek Stabilization of the riverbed with gravel
EXECUTION PERIOD: 2010 – July 2014
TOTAL COSTS: CZK 2,600,000
Riverbed restoration | Pool construction | Planting trees and wetland plants 23 REVITALIZATION IN THE STROMOVKA PARK
The stream in the Royal Game Preserve is not a natural watercourse. Originally, it served as a tail race for a pond founded by Emperor Ferdi- nand I in 1548. During the reign of Emperor Ru- dolph II, a new large pond was built with an area of 20 hectares. It was fed by water from the Vl- tava River, which was supplied by the so-called Rudolph‘s Tunnel leading through the Letná Hill. The tunnel has been supplying water to all exi- sting ponds in the Stromovka Park to this day. The revitalization was the result of the long- term unsatisfactory condition of the stream. Due to its minimum gradient and relatively large wa- ter depth (up to 1 metre), the stream was conti- nuously clogged with leaves and sediments and required regular cleaning. The channel was often 2 or even 3 metres wide, with deep and almost vertically washed out banks at many locations as a result of frequent cleaning. Overall, the stream seemed quite gloomy and neglected, particularly in the newly renovated areas of the park. In 2010, the Department of Environmental Protection of the Prague City Hall decided to re- Newly landscaped pool Original pool Revitalized channel vitalize the channel. The revitalization included Cís ařsk the narrowing of the channel to a width of 1.5 to em ý os lýn trov m 2 metres, the stabilization of the channel and the m ký řs Za elek ísa trárnou banks with boulder masonry, and the shallowing C of the channel in order to lower the water level to Za approximately 20 centimetres. The boulder bank lining was chosen in order to ensure maximum resistance to erosion caused by the large num- obora vská ber of ducks and swimming dogs. Králo The slope of the stream banks was reduced to a ratio of 1:1.5-1:2, with the local, moderate- G o ly declining access ways to the water. Natural- e t h e ly, ensuring access to water and interconnecting h o the park with the stream were one of the main REVITALIZATION V ý s t objectives of the revitalization project. The banks a v i š t of two lagoons situated along the stream were á ě sk d revitalized in the same manner. In addition, lar- ar h tt o ge boulders, which rise above the water surface, P G V e n S l a á t s r l ov o é r m a lke m were installed in the lagoons. o o ě d W s o v v e tí k a a c P
h o K Sta d rému B k ubenč a i š ta n y
Length of revitalized area: 390 metres | Stabilization of the channel | Total costs: CZK 2,600,000 2010 Overview
Investor: City of Prague Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Jiří Karnecki
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague) Watercourse Department Original wide channel with Representative: Ing. Ondřej Palička washed-out banks Reconstruction of stairs Landscaping and moderation DESIGNER: prior to inflow into pipeline of the bank slopes Stream after revitalization Ekotechnik-inženýring s.r.o. Ing. Jiří Jílek
EXECUTION PERIOD: October 2009 – September 2010
TOTAL COSTS: CZK 2.6 million
Reconstruction of lining at pipeline inflow | Channel narrowing and stabilization | Bank slope moderation | Replanting of vegetation 24 REVITALIZATION OF Čihadla II – Svépravický CREEK
This revitalization is built on the modifi- cations made in 2008 and covers the area between the Dry Polder Čihadla, the Pond V Piskovne and the Pond Martinak. Its main part, which was completed in 2015, is the mo- dification of the originally straightened Svépra- vický Creek, which served more like a draina- ge channel here than a creek. The bottom of the creek was increased by 1.5 m and a new meandering riverbed, local- ly stabilized by a stone basin, was modelled in the newly emerging area, which reached up to a width of 10 m. The concrete step into the sandpit at the millrace was cancelled and re- placed by a short stone slide, thanks to which the riverbed was widened and a small water area was created here. This modification consisted of the recon- struction of the bridge across the creek. The
H Map of the A new riverbed A new bridge ub A new pool at the Pond Martinak Bry original concrete channel from the outflow áč Valenty ksov ko Arnošta a va revitalizatione from the Pond Martinak was covered and the a Bergmanov newly built drain now has the shape of a na- ture close riverbed with gradual shores. In the field, next to the Martinak, a new 1,800-squa- re-meter pool was built. The preparation and
M the runoff from the Pond V Piskovne also pas- a d
a r o
v sed through the revitalization. The water from a the sandstone originally flowed to Rokytka. Revitalization However, now it has a new outflow which sup- of the riverbed plies the adjacent wetland in the western part of the Piskovna with water and the water is pool then goes back to the Svépravický Creek. As a part of the revitalization the path from M i P n o a ř s í t k lo the Svépravický Creek to the ford via Rokytka J o v a v a a B n a s r
o t o was strengthened. v Langweilova ň a k o k v á a l ká d rs O The project was co-financed by the Operati- i ežá
N K V s e lu t
á h onal Program Prague – Competitiveness. u
Length of revitalization 542 m | Modification of the riverbed of the Svépravický Creek | Costs: CZK 5,300,000 2015 Prague & EU: Overview We invest into your future, European Union European Fund for regional development
Investor: City of Prague, Department of Environmental Protection of the Prague City Hall Investor’s representative: Ing. Jiří Karnecki, Ing. Richard Polifka, Ing. Martina Buchtíková
CONTRACTOR: Nowastav, a. s.
DESIGNER: Ekotechnik-inženýring, s. r. o., Ing. Jiří Jílek Expansion of the riverbed A new natural riverbed The original concrete riverbed EXECUTION PERIOD: Demolition of the concrete fortification April 2015 – September 2015
TOTAL COSTS: CZK 5,300,000
Pool construction | Removal of the concrete fortification | Meandering the riverbed | Vegetative treatment 25 Zátišský CREEK – STABILIZATION OF THE RIVERBED
The Zátišský Creek springs in Lhotka under a for- mer swimming pool and the three ponds are built the- re: The Pond U Vodotoku, the Zátišský Pond and the Hodkovicky Reservoir. In the 1970s an extensive stabilization of the river- bed and its straightening was carried out within the process of building up the sites in the surroundings of the Zatisske Valley and the sedimentation of rain- water from the surrounding settlements into the cre- ek. The river was stabilized by wooden fences and stone steps. The Pond U Vodotoku and the Zátišský Pond were repaired, as well as the Hodkovicky Re- servoir. However, the volume of water in the Zátišský Creek was greater than the newly modified riverbed could hold and soon the destruction of the fortificati- on of the riverbed took place. The local stream had left the original riverbed completely and created a new ri- verbed nearby. The largest erosion groove was up to 4 m deep and the private land in the neighbourhood was also endangered in some places. The removed Revitalized riverbed Stabilized riverbed material then trapped in the reservoirs on the stream.
J it ř Within the revitalization the stabilization of the n a í v Na v o ch ýsp ík N m Na lysiná o ě v o se h d vo N channel was accomplished at some places by me- le é u d ěm ad k L v č N c o i i s V r ě s c v Ko k á a k i n ran á í m i o d á o v s na l va n si b le ans of a heavy stone equatorial, so-called mountain ly v ř á d e Po tiší u a U Jí Z Zá d H n lo U Fil o osofská Na v a K d ko s lá v upa k N no dly á treatment, which has been increasingly used in Pra- va a í dubinám n U K d U vodot k e oku H gue with a very positive experience. The remains of l o o o u dk P V Záti p ov š a K í N ic Z a d ká the original fortifications were removed and the steps át d í e iš zn l í Z U lá á V mo á k křinác ezi t h louhé m i s Na d š n h í were replaced by stone slides and gravel beds. Ero- ác m iá čin ce r V lu ot a h M P R L ká eřs í sion grooves have been stabilized so that no further ů Ve Lib s ž a n REVITALIZATION e v i n o c í k n tk ky C á deepening could appear, but at the same time, the REVITALIU ŠZuATIONmavěn s a K k ř á a h e M o
Č l s u
Z c e p perpendicular banks for nesting of the kingfisher have h s á i c k á t o sk i l k o Kabeláčova š d vo Do č Z á tvrti s s ů U
k l Z m o K been kept. Several pools were built on the stream and á á v Ryt á ru a á e íř k S m k K ova tec b anic ot n ho e o ý rh N oč L K c i k e s v á d a I a u k a in its surroundings. k v m o l
k o é í a s C š v ě r ho h T v c n y i y r
i u k a D o c
s o K Orionce Družn h á e The modification of the right shore under the Sa- y r o c x L á V a k v o ov e i vs s išk l D aš e a L Her u ko ob á rmannova va D tk C K o i natorium Pronatal, where a large number of black v h r a Kutilova H l o a á a v lská u o ř he s p o uc z Ch o u v o k a dumps were located, was a part of the project. The v u va v o o a Šp S bín a irkov whole area was cleaned and greened. Hru a
Length of the revitalization 840 m | Stabilization of the riverbed | Costs: CZK 2,200,000 2012–2013 Overview
INVESTOR: City of Prague, Department of Environmental Protection of the Prague City Hall Investor‘s representative: Ing. Richard Polifka
CONTRACTOR: Lesy hl. m. Prahy (Forests of the City of Prague), Watercourse Department Representative: Ing. Ondřej Palička, Zdeněk Baloun Stabilized riverbed with a pool Deep erosion of the Remains of the stone layer riverbed before í DESIGNER: after revitalization Works on fortification of the riverbed Ekotechnik-Inženýring, s. r. o. Ing. Jiří Jílek
EXECUTION PERIOD: September 2012 ‒ August 2013
TOTAL COSTS: CZK 2,200,000
Stabilization of the damaged riverbed by heavy stones | Construction of pools on the stream | Making shores gradual 26