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土壤圈(英文版). 2005, (06)

A Distributed Monthly Water Balance Model for Analyzing Impacts of Land Cover Change on Flow RegimesEnglish Full Text

XIA Jun1,2, WANG Gang-Sheng1, YE Ai-Zhong2 and NIU Cun-Wen2 Key Lab. of Water Cycle ＆ Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 (China) 2 State Key Lab. of Water Resources ＆ Hydropower Engineering Sciences, Wuhan University, Wuhan 430072 (China)

Abstract: The Miyun Reservoir is the most important water source for Beijing Municipality, the capital of China with a population of more than 12 million. In recent decades, the inflow to the reservoir has shown a decreasing trend, which has seriously threatened water use in Beijing. In order to analyze the influents of land use and cover change （LUCC） upon inflow to Miyun Reservoir, terrain and land use information from remote sensing were utilized with a revised evapotranspiration estimation formula; a water loss model under conditions of human impacts was introduced; and a distributed monthly water balance model was established and applied to the Chaobai River Basin controlled by the Miyun Reservoir. The model simulation suggested that not only the impact of land cover change on evapotranspiration, but also the extra water loss caused by human activities, such as the water and soil conservation development projects should be considered. Although these development projects were of great benefit to human and ecological protection, they could reallocate water resources in time and space, and in a sense thereby influence the stream flow.
Keywords：

distributed monthly water balance model; land use and cover change （LUCC）; remote sensing; scenario analysis;

  • Series：

    (D) Agriculture

  • Subject：

    Agronomy; Fundamental Science of Agriculture

  • Classification Code：

    S152.7

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