Water reservoir is an artificial lake. Theyformed as a result of the construction of theirrigation, hydroelectricity, improving natureetc ... the humans. Over the history ofthe natural history of the lake water is very short.Around the world, most of the water reservoirs wereis composed of less than 100 years.In Vietnam, the high old reservoirmore than 40 years, while most only from 10-30 yearsback here. According to the 1995 statistics of the InstituteFisheries Economics and planning, Ministry of fisheries, the countryWe have a large reservoir of 2,470 are small, with an area of183,597 .5 ha. In the future, to meet the needs ofeconomic development, we will also build a lotthe reservoir again, especially the large lake“
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