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《Environmental Science and Technology》 2002-01
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Estimation of Ecological Water Requirement of a River Basin in Arid Areas

FENG Hua li, WANG Chao, LI Jian chao (College of Hydrology, Water Resource and Environment, Hehai University, Nanjing 210098)  
A formula to calculate ecological water requirement of a river basin has been put forward based on theories of river corridors. In a case study in Ejina oasis, ecological water requirement was calculated for its different landscapes. The results showed that ecological water requirement of the oasis is mainly composed of four parts: 1) water needed by arbor/shrub woods, 2) shrub/meadow in the riverbank; 3) amount of evaporation of rivers and lakes; and 4) the ecological water needed by the river itself, which accounts for 73.61% of the total ecological water requirement. According to this estimation, the authors concluded that basic ecological feature of the oasis would remain intact on condition that the water requirements of the above four parts could be met, but it is more important to maintain the river runoff that can satisfy the ecological water requirement of the minimum function area.
【CateGory Index】: X171.4
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