地理学报

地理学报 ›› 2001, Vol. 56 ›› Issue (3): 261-268.doi: 10.11821/xb200103002

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中国西北地区蒸发散量计算的遥感研究

陈云浩, 李晓兵, 史培军   

  1. 北京师范大学环境演变与自然灾害教育部重点实验室,北京师范大学资源科学研究所北京100875
  • 收稿日期:2000-12-19 修回日期:2001-03-11 出版日期:2001-05-15 发布日期:2001-05-15
  • 基金资助:
    国家重点基础研究发展规划项目(G1999043404);国家自然科学基金重大项目(39899374)资助

Regional Evapotranspiration Estimation over Northwest China Using Remote Sensing

CHEN Yun hao, LI Xiao bing, SHI Pei jun   

  1. 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

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383 | 44

摘要： 自然陆面区域蒸发散的计算是一个复杂的问题。在利用遥感资料求取地表特征参数的基础上,首先建立了 2种极端条件下 (裸露地表和全植被覆盖 )的裸土蒸发和全植被覆盖蒸散计算模型,然后结合植被覆盖度给出非均匀陆面条件下的区域蒸发散计算方法。实测资料验算表明该模型具有较高的计算精度。

关键词: 蒸发散, 遥感, 植被覆盖度, 西北地区

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

中图分类号: 

  • P332.2