Eco-environmental water demands for the Baiyangdian Wetland

2008, Volume 2, Issue 1

Abstract

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Frontiers of Environmental Science & Engineering >> 2008, Volume 2, Issue 1 doi: 10.1007/s11783-008-0015-y

1.State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University; 2.State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University; Research Center for Environment Protection and Transportation Safety, China Academy of Transportation Sciences Ministry of Communications

Available online: 2008-03-05

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Abstract

In recent years, the hydrological characters of Baiyangdian Wetland have changed greatly, which, in turn, influence the biotic component, the structure and function of the wetland ecosystem. In order to determine the demands for water resources of ecological wetland system, a method of ecological water level coefficient was suggested to calculate the water resources demands for wetland environment use. This research showed that the minimum coefficient is 0.94 and the optimal coefficient is more than 1.10. According to these two coefficients, the ecological water level and water quantity can be estimated. The results indicate that the amount of the minimal and optimal eco-environmental water requirements are 0.87 × 10 and 2.78 × 10 m in average monthly, respectively, with the maximum eco-environmental water requirement in summer and the minimum in winter. The annual change of eco-environment water demand is in according with the climate change and hydrological characters. The method of ecological water level emphasizes that wetland ecosystem adapts to the hydrological conditions, so it can be used in practice well.

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