摘要
区域陆面蒸散发的估算对于计算区域水资源总量,合理配置水资源具有重要意义。针对处于大汶河流域上游、受人类活动影响较小的雪野水库、黄前水库、东周水库控制子流域的实际特点,分别利用MODIS遥感方法、SWAT模型法、水面蒸发折算系数法对这三个子流域2000年-2008年的多年平均年陆面蒸发量及多年月平均陆面蒸发量进行估算,并基于水量平衡方程,结合各子流域的同期降雨与天然径流资料,对估算结果进行了分析比较。结果表明:在大汶河流域内,采用MODIS遥感方法估算实际陆面蒸散发的精度较低;水面蒸发折算系数法具有一定精度;SWAT模型法精度较高、适应性较好,估算误差仅在3%左右。研究结果可为半湿润区陆面蒸发估算方法的选择提供参考。
The estimation of regional land surface evapotranspiration is of great significance to calculating the total amount of regional water resources and to allocating water resources reasonably.According to the characteristics of the sub-basins controlled by Xueye reservoir,Huangqian reservoir,and Dongzhou reservoir in Dawenhe River basin,we respectively used MODIS remote sensing method,SWAT model,and conversion coefficient of water surface evaporation to estimate the average yearly and monthly land surface evaporation of the three sub-basins from 2000 to 2008.Based on the rainfall and natural runoff data of each subbasin over the same period,we analyzed and compared the estimated results.The results showed that：in Dawenhe River basin,the accuracy of the MODIS remote sensing method was low;the conversion coefficient method had a certain precision;the SWAT model method had higher calculation precision and better adaptability,and its estimation error was only about 3%.The results can provide references for selecting methods of estimating the land surface evaporation in the semi-humid region.
出处
《南水北调与水利科技》
CSCD
北大核心
2017年第5期50-55,共6页
South-to-North Water Transfers and Water Science & Technology
基金
国家自然科学基金(51579068
51379055)~~
关键词
陆面蒸发
大汶河流域
MODIS遥感方法
SWAT模型
折算系数法
land surface evaporation
Dawenhe River basin
MODIS remote sensing method
SWAT model
conversion coefficient method
