| Estimation of regional evapotranspiration over Northwest China using remote sensing |
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| 作者姓名： | CHEN Yun-hao LI Xiao-bing SHI Pei-jun |
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| 作者单位： | 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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| 基金项目： | National Natural Science Foundation of China, No. 39899374，National Key Program for Basic Science of China, No. G1999043404 |
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| 摘 要： | 1 IntroductionThe method for estimating evapotranspiration (ET) was first given by Dalton in 1802, and a number of models for ET estimation have been presented since then. Those models, from the experiential and semi-experiential models1,2] and physical models3,4] to the models in terms of the mechanism for energy and water fluxes in soil-vegetation-atmosphere transfer system such as SiB, have improved the precision of ET estimation. It is, however, difficult to calculate regional ET by …
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| 收稿时间： | 22 March 2007 |
Estimation of regional evapotranspiration over Northwest China using remote sensing |
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| CHEN Yun-hao,LI Xiao-bing,SHI Pei-jun.Estimation of regional evapotranspiration over Northwest China using remote sensing[J].Journal of Geographical Sciences,2001,11(2):140-148. |
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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, |
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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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