常用遥感蒸散发模型干湿限的新定义及数值模拟

被引:3
作者
冯景泽
王忠静
机构
[1] 清华大学水沙科学与水利水电工程国家重点实验室
关键词
蒸散发; 遥感; 干限; 湿限; 空间歧义性; 数值模拟;
D O I
10.16511/j.cnki.qhdxxb.2013.01.003
中图分类号
TP79 [遥感技术的应用]; P426.2 [蒸发与蒸散];
学科分类号
081102 ; 0816 ; 081602 ; 083002 ; 1404 ; 0706 ; 070601 ;
摘要
为解决目前常用遥感蒸散发模型干、湿限选取不确定性导致蒸散发反演结果存在的空间歧义性,对遥感蒸散发模型干限、湿限进行重新定义。对干湿限进行垂向一维热扩散数值模拟,以验证重新定义的干湿限能量分配假设及部分重要遥感参数取值的合理性。利用疏勒河流域地下水均衡试验场土壤剖面温度数据对干限温度进行验证,均方根误差为1.68K;利用参考作物蒸散量对湿限蒸散量进行验证,线性回归确定性系数约为0.90。研究结果表明:重新定义的干湿限推导求解方案合理,有助于避免遥感蒸散发模型中的空间歧义性。
引用
收藏
页码:29 / 35
页数:7
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