基于NOAA/AVHRR数据估算三江平原蒸散量研究初探  

Estimated Evapotranspiration Based on NOAA/AVHRR Data in the Sanjiang Plain

作　　者：杜嘉[1,2] 张柏[1] 宋开山[1] 王宗明[1] 曾丽红[1,2] 金翠[1,2] 黄妮[1,2] 

机构地区：[1]中国科学院东北地理与农业生态研究所,长春130012 [2]中国科学院研究生院,北京100049

出　　处：《水土保持研究》2009年第2期56-62,共7页Research of Soil and Water Conservation

基　　金：中国科学院知识创新工程重要方向项目(KZCX3-SW-356);中国科学院“东北之春”人才培养计划

摘　　要：蒸散量是水资源相互转化过程中非常重要但又难以定量确定的要素之一。SEBS(Surface Energy Balance System)模型是通过遥感数据计算区域蒸散量的重要模型,该模型可以在较少地面信息的情况下获得蒸散量的区域分布信息,同时具有较高的精度。采用SEBS模型,利用NOAA/AVHRR数据对我国重要的商品粮基地三江平原区域蒸散发量进行了研究,并通过实测数据对估算结果进行了验证。结果表明:从时间分布来看,三江平原蒸散量总体上表现为从4月开始逐渐上升,7月达到最高值,8月后不断下降。在此基础上,探讨了三江平原蒸散量时间分布的原因。同时,结合研究区的土地利用类型,对三江平原区域蒸散量空间分布进行了分析,各种土地利用类型生长季平均蒸散量从大到小可以排列为:林地>水域>湿地>水田>旱田>草地>居工地。Evapotranspiration（ET）is one of the most significant component of the hydrologic cycle.Among the several ET estimation methods,the remote sensing method is regarded as the only technology that can efficiently and economically provide regional and global coverage of actual consumption.The SEBS（Surface Energy Balance System）has been designed to calculate the energy portioning at the regional scale with minimum ground data and has been verified at many places in the world including China.SEBS is a satellite image-processing model for computing ET maps for large areas.This paper used the SEBS method to estimate ET according to NOAA AVHRR data in the Sanjiang Plain in Heilongjiang province of China.The resuilt was validated by observed data.Resuilts showed that evapotranspiration increased in April,decreased in August and reached the peak in July.The reason of temporal distribution was also anlyzed.Meanwhile the spatial distribution of ET was anlyzed by the land-use pattern.The average ET of these land-use patterns during growing season were in the order of forest,waters,wetland,paddy,dry land,grassland,resident and industry land from big to small.

关 键 词：NOAA/AVHRR数据 蒸散量 三江平原 SEBS 

分 类 号：P426.2[天文地球—大气科学及气象学]