运用高分辨率ETM^+数据计算区域作物蒸散  

Estimation of regional evapotranspiration using high resolution LANDSAT/ETM^+ data

作　　者：姜杰[1] 张永强[2] 刘昌明[2] 

机构地区：[1]北京师范大学环境学院,北京100875 [2]中国科学院地理科学与资源研究所

出　　处：《水科学进展》2005年第2期274-279,共6页Advances in Water Science

摘　　要：在太行山山前平原典型农区,对区域地表能量平衡及日蒸散模型进行了实证研究,且通过中国科学院栾城农业生态试验站田间实测资料对模型估算结果进行了有效性的验证。结果显示,采用LANDSAT 7ETM+的高分辨率数据结合地面同步的观测数据作为模型的输入变量,可以很好地估算农田的日蒸散量及能量平衡各分量。在典型农区,日蒸散量、NDVI的频率分布随作物生长季节的变化表现出一定的差异性。A model for the regional surface energy-balance and daily evapotranspiration is applied to the farmlands in the North China Plain, and the experiments at Luancheng Agro-ecosystem station, Chinese Academy of Sciences are made to test the accuracy of the model. The results show that the model can successfully estimate the surface daily evapotranspiration and the components of the surface energy-balance with the inputs of LANDSAT-7 Enhanced Thematic Mapper-Plus (ETM+) data and synchronous surface observation data at the experimental station. The frequency distribution of the daily evapotranspiration and the NDVI is different in different crop growing seasons, which is mainly caused by the different vegetation indexes.

关 键 词：地表能量平衡 日蒸散量 水分亏缺指数 华北平原 作物蒸散 高分辨率 

分 类 号：S161.4[农业科学—农业气象学]