基于Landsat8辐射模块耦合SEBAL模型蒸散发估算  

Evapotranspiration Estimation Adopting SEBAL with a New Radiation Module Based on LANDSAT8 data

作　　者：翟劭燚[1] 王文种[1] 刘九夫[1,2] 王欢[1,2] 陆之昂[1,2] ZHAI Shaoyi;WANG Wenzhong;LIU Jiufu;WANG Huan;LU Zhiang(Nanjing Hydraulic Research Institute,Nanjing 210029,Jiangsu,China;Researc Center for Climate Change,MWR,Nanjing 210029,Jiangsu,China)

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]水利部应对气候变化研究中心,江苏南京210029

出　　处：《水力发电》2019年第1期18-22,111,共6页Water Power

基　　金：国家自然科学基金面上项目(51579148)

摘　　要：蒸散发(ET)是干旱和半干旱地区生态水文循环过程的重要因素。Landsat8数据的波谱信息丰富、空间分辨率高,是通过遥感技术反演蒸散发的理想数据源。SEBAL模型是以陆面能量平衡为基础,物理意义明确;但净辐射估算影响其估算精度。研究详细阐述了基于Landsat8数据的辐射模块耦合SEBAL模型,旨在提高反演结果精度,满足在水文、生态和农业研究应用中的需要。The evapotranspiration( ET) is important factor of the eco-hydrological process in arid and semi-arid region. The Landsat8 product which has abundant spectral information and high spatial resolution is an ideal data for inverting ET through remote sensing technology. The Surface Energy Balance Algorithms for Land( SEBAL) model based on land surface energy balance has clear physical meaning,but the accuracy of estimated ET using SEBAL model is sensitive to the accurate estimates of net radiation. To this end,a new radiation module to utilize landsat8 product has been coupled with SEBAL to better estimate ET. This study can improve the accuracy of the inverting ET and meet the needs in hydrology,ecology and agriculture studies.

关 键 词：蒸散发 SEBAL Landsat8 能量平衡 

分 类 号：TP701[自动化与计算机技术—检测技术与自动化装置]