基于遥感技术的区域地表蒸散研究进展

Advances in the Study of Evapotranspiration of Regional Land Surface Based on Remote Sensing Technology

遥感技术的发展为大面积的区域地表蒸散(evapotranspiration,ET)反演和估算提供了一种新的手段,国内外学者围绕该领域在理论和技术方法上开展了大量研究。能量平衡原理是遥感估算地表ET的理论基础,由此发展出多种遥感ET模型与算法。在分析几种常见ET模型算法的基本原理及优缺点的基础上,阐述了不同方法的适应性及相关研究进展情况,提出了目前遥感ET研究所存在的问题,展望了遥感ET的发展趋势。

The development of remote sensing technology provides a new means for the inversion and estimation of widespread land surface evapotranspiration（ET）.Researchers both in China and abroad have already studied the theories and techniques of this field.The principle of energy balance is the basic theory of estimating land surface ET,which has led to the formulation of a lot of models and algorithms of remote sensing ET.Based on an analysis of basic principles as well as merits and shortcomings of several models,the authors expound the adaptability and progress of different methods,point out the existing problems of the study of remote sensing ET,and finally prospect the development trend of remote sensing ET.