ENWAMA meeting in Budapest 27.-30. 9. 2009Corvinus University

Černý potok stream, June Černý potok stream, June 20092009

http://www.ustinadlabem.ochranaprirody.cz/index.php?http://www.ustinadlabem.ochranaprirody.cz/index.php?cmd=page&id=5075cmd=page&id=5075

August 2009, web AOPK ÚL (Agency for August 2009, web AOPK ÚL (Agency for Nature Conservation and Landscape Nature Conservation and Landscape

Protection of the CR)Protection of the CR)

River Cai, Nha Tranh, River Cai, Nha Tranh, Vietnam, eroded bankVietnam, eroded bank

River Cai, Nha Tranh, River Cai, Nha Tranh, Vietnam, sediments Vietnam, sediments

deposits in the other bankdeposits in the other bank

We have to hold water in We have to hold water in the catchment areathe catchment area

PoolsPools

WetlandsWetlands(www.etf.cuni.cz)

(www.hostivice.cz)

Blind stream Blind stream branchesbranches

Planting of vegetationPlanting of vegetation

(www.elateridae.com)(www.dotace.natura.cz)

SkerneSkerne

River length: 40 kmRiver length: 40 km

Basin area: 250 kmBasin area: 250 km22

1995 – 1998 1995 – 1998

rehabilitation of 2 km rehabilitation of 2 km

riverriver

Obnova peřejíObnova peřejí

Two stage channel designTwo stage channel design

Left trapezoidal channel, right rehabilitated two stage channel. Source: Promoting Naturalized Drainage Channel Design, Ohio, USA, 2003

Two stage channel design, Part 654 Stream Restoration Design, National Engineering Handbook, US department of Agriculture, Natural Resources Conservation Service, Chapetr 10, 2007

Advantages Advantages

FinanceFinance Better ecosystemBetter ecosystem Better in low runoffsBetter in low runoffs Flood protectionFlood protection Good in sedimentation Good in sedimentation

transporttransport Farming basins with small Farming basins with small

slopeslope Farming land from both Farming land from both

sidessides

Chabařovice lake – juvenile fish Chabařovice lake – juvenile fish catching with netcatching with net

Eutrophication lake – small Eutrophication lake – small fish catchingfish catching

Upper small lake above Upper small lake above Chabařovice lakeChabařovice lake

Chabařovice lakeChabařovice lake

Eutrophication small lake above Eutrophication small lake above Chabařovice lakeChabařovice lake

„„MostMost““ artificial lake – artificial lake – flooding of closed lignite flooding of closed lignite

minemine

Lake near town MostLake near town Most

Small lake above lake Most Small lake above lake Most – juvenile fish catching – juvenile fish catching

placeplace

Experiments Experiments

Juvenile fish catching with small net – successfull

Plankton samples taking – successfull (depends on level of flooding and place of taking sample)

Cooperation with Academy of Science – Hydrobiological Institute in České Budějovice town

References References

Manual of River Restoration TechniquesManual of River Restoration Techniques, 2002,, 2002,

River Restoration Centre, Silsoe, UK,River Restoration Centre, Silsoe, UK,

<<http://www.therrc.co.uk/rrc_manual_pdf.php>>