Štěchovice Reservoir

Infobox lake
lake_name = Štěchovice Reservoir
image_lake = Stechovice reservoir.jpg
caption_lake = Štěchovice Dam
image_bathymetry =
caption_bathymetry =
location =
coords = coord|49|50|00|N|14|26|00|E|type:waterbody_region:CZ|display=inline,title
type = reservoir
inflow = Vltava River
outflow = Vltava River
catchment =
basin_countries = Czech Republic
length =
width =
area = 95.7 ha
depth =
max-depth =
volume = 11.2 million m³
residence_time =
shore =
elevation =
islands =
cities =

Štěchovice Reservoir (in Czech "Vodní nádrž Štěchovice") is a dam on Vltava River built during 1937 - 1945 as the second stage of the Vltava Cascade. The dam is named after nearby village Štěchovice.

The construction started before the war and because of the need for electricity resources were allocated for the project in spite of general shortage. The power station was put in action in 1943. The reservoir had flooded Svatojánské Streams ("Svatojánské proudy", ^{[http://www.svatojanske-proudy.cz/]} ), the most dangerous but romantic part of Vltava.

The main role of the reservoir is to balance the water runoff from peak-load power station at Slapy Dam and to propel two Kaplan turbines with total installed power 2 x 11.25 MW (Štěchovice I). A lock (20.1 m difference between water levels, length 118 m) handles ships with displacement up to 1000 tons.

The reservoir is also used by the pumped-storage hydroelectric plant Štěchovice II whose upper reservoir was created on the top of hill Homole. The plant was set in operations in 1947 and closed in 1991 due to obsolence. During 1992 - 1996 a new hydroelectric plant using the reservoirs was built. This plant uses reverse Francis turbine with power 45 MW.

During 2002 floods the turbines of both power plants were severely damaged. After overhaul the plants were put back in production in 2004 and 2005 respectively.

Technical parameters of the reservoir

* height of the dam: 22.5 m
* length of the dam arch: 124 m
* held back water stretches 9.4 km
* reservoir area: 95.7 hectares
* water capacity: 11.2 million m³
* located on 84.4 km of the river

External links

* [http://www.cez.cz/presentation/eng/instance_view.jsp?instance_id=76691 Overview on website of the operator, ČEZ] (en, cz, de)
* [http://www.pvl.cz/vd-stechovice-F059A3FD.html Overview on website of Vltava River Authority] (in Czech)
* [http://www.stechovice.info/pages/prehrady.htm Overview on website of Štěchovice village] (in Czech)