Sulejowski Reservoir
Introduction The '''Sulejowski Reservoir''' (, ) is an artificial lake, a reservoir created by a dam, built in the years 1969-1974 in the Łódź Voivodeship. The aim of this reservoir was to supply fresh drinking water to the city of Łódź and Tomaszów Mazowiecki. At full capacity the reservoir contains up to  of water and has an average depth of .
History The idea of constructing a reservoir on the Pilica river was put forth in the 1960s. The existing water supplies could not fulfill the demand of the growing populations and industries in Łódź and Tomaszów Mazowiecki. At times, water rationing had to be implemented.=== Water for Łódź ===The construction began in 1969,  from the outlet of Pilica, into the Vistula river; near Smardzewice. At the time the area was the border between the Łódź and Kielce Voivodeships. A slogan ''Water for Łódź'' (Polish: Woda dla Łodzi) was featured on a poster near the dam construction site and in the area where the forest had to be cleared for the future body of water.A  long and  tall concrete and soil dam was constructed and a total area of  was flooded. To transport the water from the reservoir, a  long pipeline with a diameter of  was built. A section of the pipe between the water treatment plant in Kalinko and a pumping station with storage tank in Chojny has an increased diameter - .=== Early operations ===The usage of the reservoir started in May 1973; at the time it was the largest body of water in Central Poland. Later that year, the first water delivery to Łódź was completed. In 1977 the pipeline was supplying  of water per day, the highest waterworks production in the history of Łódź. By comparison, that volume was 2 to 2.5 times larger than the current usage by the whole city. The construction of a second pipeline with equal capacity was considered, but the decreasing demand from population, declining light industry and availability of other sources have made it redundant.=== Construction of wells ===Deep aquifers were discovered and mapped in the village of Bronisławów, near the reservoir's shore. They offered much higher quality water and by the 1990s plans were put in place to replace the reservoir's supply with deep wells. The same pipeline was used, but since 2004 it carries water extracted only from the 7 wells near Bronisławów and the reservoir is no longer used to supply water.The total production capacity of the well is  of water per day and  per year.=== New pipeline ===The degrading quality of the old pipeline and reduced needs led to a construction of a new water delivery system. It was constructed in 2009-2010 and partially funded by European Union grants. The old pipeline was cleaned by a tractor with a custom-built elliptical plough and a new, fiberglass pipeline with a diameter of  was laid inside the old one.
Geography The Sulejowski Reservoir is located  at an elevation of . It lies in the Łódź Voivodeship, at the border of Tomaszów Mazowiecki, Opoczno and Piotrków Powiats. The Pilica and Luciąża inflows are located at the southern end of the lake in Gmina Sulejów. The dam lies at the north-eastern boundary of the reservoir and the Pilica outflow is located at  in Gmina Tomaszów Mazowiecki. Parts of the lake and the shoreline are within Gmina Wolbórz and Gmina Mniszków.
Parks and recreation In addition to the water supply and energy producing functions, Sulejowski Reservoir serves as a center for recreation. There are multiple hotels and vacation homes in the vicinity and watersports infrastructure by the shoreline. The main activities are sailing, windsurfing, kayaking and fishing. The usage of motorboats is forbidden and a quiet zone is enforced across the lake.A concrete pier has been constructed on the lake near Smardzewice. It will be revitalized in a new project set to begin in 2020.The total funding is 7.2 mln PLN, 4.7 mln of which will be funded by the European Union.The reservoir lies at the northernmost part of the Sulejów Landscape Park which is centered around the Pilica river and contains protected forests.There are 2 protected areas defined by the reservoir:* Direct - all of the reservoir's water, including the former water intake in Bronisławów* Indirect - a  wide strip of land along the shoreThe reservoir has been found to contain less pollution compared with other freshwater environments
Wildlife The protected area around the reservoir provides habitat for multiple species of wildlife, including:* Fish: Common roach, Common bream, Common carp, Northern pike, Zander*Birds: Tern, Black-headed gull, Common pochard, Mallard, Swan
Gallery File:Sulejowski Reservoir view form Tomaszów Mazowiecki, 2018-05-27.jpgFile:Zalew Sulejowski Smardzewice.jpgFile:Widok na Zalew Sulejowski od strony Tomaszowa Mazowieckiego.jpgFile:Tama na Zalewie Sulejowskim, maj 2018.jpgFile:Jedna z trzech śluz tamy na Zalewie Sulejowskim. Widok od strony Tomaszowa Mazowieckiego.jpgFile:Zalew Sulejowski, widok od strony Smardzewic przy restauracji Omega, maj 2018 r.jpgFile:WP 20141011 001.jpgFile:Zalew Sulejowski - panoramio - Rafał Klisowski (6).jpgFile:Zalew Sulejowski - panoramio - Rafał Klisowski (5).jpgFile:WP 20140721 001.jpgFile:Zalew Sulejowski - panoramio - Rafał Klisowski.jpgFile:WP 20140722 002.jpgFile:Zalew Sulejowski - panoramio - Rafał Klisowski (2).jpgFile:Zalew Sulejowski.jpgFile:Sulejów Reservoir (2).JPGFile:WP 20141110 003.jpgFile:Zalew Sulejowski - panoramio - Rafał Klisowski (3).jpgFile:Sulejów Landscape Park (01).JPGFile:The Pilica River just behind the dam on the Sulejów Reservoir, Poland.jpgFile:Eastern embankment of Sulejowski Reservoir View from the dam in Smardzewice from Tomaszów Mazowiecki side. Łódź Voivodeship, Poland.jpg
References
External links * A promotional article in English* The official website of the lake in Polish