多卫星遥感降水数据在塔里木河流域的适用性分析

资料缺乏地区由于其复杂的地形,站点布设困难,实测资料匮乏,遥感降水产品是实测资料的有益补充及替代。以塔里木河流域的子流域开都-孔雀河流域为研究区,采用国家基准气象站观测的降水量为基准数据,评估了TRMM 3B42RT、TRMM 3B42V7、CMORPH RAW、CMORPH CRT等四种遥感降水产品的精度。同时,在塔里木河的子流域玉龙喀什河流域,基于SRM模型,评估了以上几种遥感降水产品模拟径流的适用性。结果表明,TRMM 3B42V7的精度最高,TRMM 3B42RT的精度较低,CMORPH在山区的精度也较高,而CMORPH在平原地区高估了降水量;在四种遥感降水产品中,TRMM 3B42V7最适于模拟径流,可以基本表征日径流变化过程。

Applicability analysis of multi-satellite remote sensing precipitation data in Tarim River basin

Because o f the complex terrain in the cold and dr y reg ion, ther e ar e few statio ns and little measur ed data. Remote sens2 ing precipitation pr oduct is a useful supplement to the measur ed data. Based on the observed pr ecipitatio n data from the surface met eo ro lo gical stations, taking Kaiko ng Riv er sub2basin of Tarim River basin as t he study area, w e ev aluated the accuracy of four r emo te sensing pr ecipitation products, TRMM 3B42RT , TRM M 3B42V7, CMORPH RAW and CMORPH CRT. Mean2 w hile, in the Yurungkash River sub2basin, based on the SRM model, w e evaluated the applicabilit y of t he abov e remo te sensing pr ecipitatio n pro ducts fo r runo ff simulation. The r esults showed that TRMM 3B42RT had low accur acy w hile the TRMM 3B42V7 had the highest accuracy. CMORPH had high accur acy in mo untaino us areas, but over est imated the precipitation in plain areas. Among the fo ur kinds of remo te sensing precipitat ion pr oducts, TRMM 3B42V7 was the most suitable for r unoff simulatio n, and could basically char acterize the pr ocess o f daily runoff.