遥感估算蒸散发应用于灌溉水资源管理研究进展

Research Progress on Evapotranspiration Estimation Based on Remote Sensing and Its Application in Irrigation Water Resources

本文通过回顾蒸散发估算理论及方法的发展历程,系统总结了区域蒸散发遥感估算方法与模型;以地表能量平衡类遥感蒸散发估算模型为例,阐述了利用遥感数据进行蒸散发估算的基本原理,并论述了其在灌溉水资源优化配置与管理中的应用;分析了基于遥感技术进行蒸散发估算存在的问题并展望了其发展趋势。利用遥感手段获取蒸散发量并基于ET管理利用灌溉水资源对发展现代节水高效农业,优化配置水资源等有着重要的理论指导和现实意义。

In order to manage and utilize irrigation water resources scientifically and reasonably by using evapotranspiration（ ET）- based strategy,the development of ET estimation theories and methods were reviewed,and firstly,models for regional ET estimation were summarized systematically; secondly, the basic principle for ET estimation based on RS data and surface energy balance models were elaborated,as well as the applications about the models in optimal allocation and management of irrigation water resources were expounded; finally,the problems existing in ET estimation based on RS were analyzed and the trends were prospected. It＇s a necessary and feasible approach to estimate ET based on RS and manage irrigation water resources by using ET-based strategy,and the approach has an important theoretical guidance and practical significance for developing modern water-saving agriculture,as well as planning and managing irrigation water resources scientifically.