中国西北地区蒸发散量计算的遥感研究

doi:10.11821/xb200103002

Acta Geographica Sinica ›› 2001, Vol. 56 ›› Issue (3): 261-268.doi: 10.11821/xb200103002

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Regional Evapotranspiration Estimation over Northwest China Using Remote Sensing

CHEN Yun hao, LI Xiao bing, SHI Pei jun

Institute of Resources Science, Beijing Normal University, Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education of China, Beijing 100875, China

Received:2000-12-19 Revised:2001-03-11 Online:2001-05-15 Published:2001-05-15
Supported by:
National Key Program for Developing Basic Science of China,No.G1999043404;National Natu ral Science Foundation of China,No.39899374

Abstract

Abstract: It is a very complicated problem to estimate evapotranspiration (ET) over large area of natural land surface In this paper, the evapotranspiration estimation models for dense vegetation and bare soil are presented based on information of surface parameters like vegetation fraction and surface albedo Combined with vegetation fraction data, a model for regional evapotranspiration estimation over the heterogeneous landscape is derived Meanwhile, through a case study with remote sensing data over Northwest China, the accuracy of the model for regional evapotranspiration estimation is checked, which shows a high accurate result The features of evapotranspiration over Northwest China are also discussed with the model.

Key words: evapotranspiration, remote sensing, vegetation fraction, Northwest China

CLC Number:

P332.2

CHEN Yun hao, LI Xiao bing, SHI Pei jun . Regional Evapotranspiration Estimation over Northwest China Using Remote Sensing[J].Acta Geographica Sinica, 2001, 56(3): 261-268.

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Regional Evapotranspiration Estimation over Northwest China Using Remote Sensing

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