Estimation of regional evapotranspiration over Northwest China using remote sensing |
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Authors: | CHEN Yun-hao LI Xiao-bing SHI Pei-jun |
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Institution: | Institute of Resources Science, Beijing Normal University, Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education of China, Beijing 100875, China |
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Abstract: | It is a very complicated problem to estimate evapotranspiration (ET) over a large area of land surface. In this paper, the evapotranspiration estimation models for dense vegetation and bare soil are presented, based on the information of parameters like vegetation cover-degree and surface albedo. Combined with vegetation cover-degree data, a model for regional evapotranspiration estimation over the heterogeneous landscape is derived. Through a case study using remote sensing data over Northwest China, the accuracy of the model for regional evapotranspiration estimation is checked. The result shows that the accuracy of the model is satisfactory. The features of evapotranspiration over Northwest China are also discussed with the application of the model. |
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Keywords: | evapotranspiration remote sensing vegetation cover-degree Northwest China |
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