农业工程学报2009，Vol.25Issue(10)：154-160,封3,8.DOI:10.3969/j.issn.1002-6819.2009.10.028
区域蒸散发分布式模拟及其遥感验证
Distributed simulation for regional evapotranspiration and verification by using remote sensing
摘要
Abstract
Regional evapotranspiration (ET) in river basins, one of the most important hydrological processes, was usually unable to be estimated efficiently due to the lack of reliable observed data. Recently, with the development of remote sensing (RS) technology and hydrological model integration, it becomes possible to estimate ET at regional scale. Remote sensing derived ET (1 km-resolution), which was derived from MODIS satellite data by the institute of remote sensing and application (IRSA) of CAS, was applied to validate the monthly ET simulated by using soil and water assessment tool (SWAT) in the Zhangweinan River basin. Agricultural management practices and parameters for crop growth were then calibrated and analyzed. The calibrated and validated results showed that ET was sensitive to both crop parameters and the soil evaporation compensation coefficient (ESCO, its value was suggested to range from 0.8 to 1.0 for the crop land of winter wheat-summer corn). Simulation had been improved greatly by using remote sensing derived ET. The coefficient of determination R~2 reached 0.93, and Nash-Sutcliffe efficiency coefficient reached 0.92. Regional ET simulation and then the hydrological modeling were greatly improved by using remote sensing derived ET.关键词
蒸散发/遥感/监测/SWAT模型/作物生长Key words
evapotranspiration/ remote sensing/ monitoring/ soil and water assessment tool (SWAT) model/ plant growth分类
天文与地球科学引用本文复制引用
蔡锡填,徐宗学,苏保林,于伟东..区域蒸散发分布式模拟及其遥感验证[J].农业工程学报,2009,25(10):154-160,封3,8.基金项目
全球环境基金(GEF)海河流域水资源与水环境综合管理项目(TF053183),北京师范大学"京师学者"特聘教授人才引进项目 （GEF）
