Włocławek Reservoir () is a

water body A body of water or waterbody is any significant accumulation of water on the surface of Earth or another planet. The term most often refers to oceans, seas, and lakes, but it includes smaller pools of water such as ponds, wetlands, or more rare ...

in the Middle

Vistula The Vistula (; ) is the longest river in Poland and the ninth-longest in Europe, at in length. Its drainage basin, extending into three other countries apart from Poland, covers , of which is in Poland. The Vistula rises at Barania Góra i ...

flow that appeared in 1970 after building of the

dam A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aqua ...

Włocławek Włocławek (; or ''Alt Lesle'', Yiddish: וולאָצלאַוועק, romanized: ''Vlatzlavek'') is a city in the Kuyavian–Pomeranian Voivodeship in central Poland along the Vistula River, bordered by the Gostynin-Włocławek Landscape Park ...

. The length of the reservoir is 58 km from

Płock Płock (pronounced ), officially the Ducal Capital City of Płock, is a city in central Poland, on the Vistula river, in the Masovian Voivodeship. According to the data provided by Central Statistical Office (Poland), GUS on 31 December 2021, the ...

, average width is 1.2 km. It is the biggest reservoir in

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...

. Due to the significant amount of

organic matter Organic matter, organic material or natural organic matter is the large source of carbon-based compounds found within natural and engineered, terrestrial, and aquatic environments. It is matter composed of organic compounds that have come fro ...

in the tank (approx. 11.5% of the dry weight of sediment), it emits approx. 400 mg of

methane Methane ( , ) is a chemical compound with the chemical formula (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas. The abundance of methane on Earth makes ...

per area of 1 m² (which is approx. 27% of the total amount of gases emitted from the sediment of average 3114 ml m⁻² d⁻¹). For this reason, is considered an important source of greenhouse gases emission.

Functions

The tank has three basic functions: * Retention - during

flood A flood is an overflow of water (list of non-water floods, or rarely other fluids) that submerges land that is usually dry. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Floods are of significant con ...

s, water on the Vistula River reservoir retains a large part of the floodwaters; * Energy - on the dam is Wloclawek hydroelectric power plant; * Tourism - Lake Wloclawski developed following tourist centers: Zarzeczewo, '' Wistka Kings'', Soczewka, Murzynowo.

Flood protection

Wloclawek reservoir tank is essentially instantaneous. From approx. 2004. In the event of high water levels acts as a storage reservoir.

Flood 2010

On 17 May at the dam in Wloclawek thrown water (3,000 m³/s), preparing for the arrival of the flood wave. 22 May inflow was 6,000 m³/s, a snapshot already amounted to 5700 m³/s. During the climax assumed dump 6,300 m³/s. May 23, at 14 the culmination wave reached Wloclawek, but the water level was lower than expected initially, due to the rupture of a dam in the town of Świniary under Plock iem.shaft broken in Świniary, 4 thousand. people to evacuate

Flood 2014

During the flood Vistula May 22, 2014 r. To Włocławski Reservoir affect 4900 m³/s, the discharge was at that time 4300 m³/s. As a result, they managed to flatten the wave of flood and reduce the risk of flooding in the lower section of the Vistula.

References

Reservoirs in Poland Lakes of Poland Lakes of Kuyavian-Pomeranian Voivodeship {{Poland-geo-stub