Causes of declining water levels and of Urumieh Lake

Lake Urmia as the world's twentieth largest lake, one of the most important and valuable aquatic ecosystems Iran Ast.hvzh watershed of the Lake of 52331 square kilometers, of which 5822 square kilometers of the lake itself. Unfortunately, due to climate change, environmental non-compliance with certain principles lake is disappearing. In this paper, applied research - libraryAnd using the lake level fluctuations due to rainfall statistics, Temperature changes, fluctuations in lake levels, surface inflows to the lake, time and number of dams operation to compare the effects of natural and non-natural factors are discussed in the lake water level changes. Finally, studies show that climatic factors have less impact than the abnormal factors. All the Lake Urmia divided into three distinct areas1) First area: With very little depth and a gentle slope and the estuary of the rivers feeding the lake (Siminehrood and Zarineh), while the fertile deposits at lower cost can be restored and converted into agricultural land Secnd area: The mid-range is As an environmentally sensitive area and planting trees capable of salt-friendly and resistant to dehydration and need to be controlled. The third area: Internal limits that prevent the complete destruction of the lake region of Azerbaijan serves as gutters.