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Evapotranspiration Estimation Based on Characteristics of Vegetation Index-Surface Temperature Space Using Remote Sensing Data
Author(s): 
Pages: 116-120,124
Year: Issue:  2
Journal: Geography and Geo-Information Science

Keyword:  MODIS 蒸散发 蒸发比 植被指数-地表温度;
Abstract: 利用MODIS卫星遥感植被指数(VI)和地表温度(Ts)产品,通过构建VI-Ts特征空间计算Priestlay-Taylor系数,并改进较为常用的三角形方法(VI的平滑除噪、Ts的高程订正、蒸发比及地表通量参数计算的优化),进而基于Priestlay-Taylor方程进行陆面蒸散发量估算。将改进的三角形方法应用于黄河重要支流伊河流域蒸散发量估算,估算结果与参考作物蒸散发量及土壤湿度状况的对比分析取得了较好的模拟效果,同时,利用该方法估算的陆面蒸散发量合理地反映了不同土地利用类型间蒸散发量的差异和季节性变化特征。
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