干旱区研究2017，Vol.34Issue(4)：755-761,7.DOI:10.13866/j.azr.2017.04.06
CFSR降水数据在干旱山区水文模型中的应用——以新疆开都河流域为例
Application of CFSR Precipitation Dataset in Hydrological Model for Arid Mountainous Area:A Case Study in the Kaidu River Basin
摘要
Abstract
Rain gauges are very scarce and unevenly distributed in the arid regions of northwest China,especially in mountainous regions,and such situation cannot meet the need of hydrological models.CFSR reanalysis precipitation dataset is a potential substitution of ground observations because of its wide coverage and high spatiotemporal resolutions,but its applicability in hydrological models for arid mountains needs to be further explored.This paper focused on the Kaidu-Kongque River Basin,one of the headwaters of the Tarim River,and compared the stationary observations with CFSR data,after applying three precipitation correction methods namely the local intensity scaling (LOCI),distribution mapping with gamma distribution (Gam) and the method coupling with the aforementioned two (gamLOCI).The raw CFSR data and the bias corrected data were used as the meteorological inputs of a distributed hydrologic model to ascertain the difference of streamflow.The results are as follows:① The relative bias between the simulated runoff volume data with raw CFSR data and the measured runoff volume data was high than 40％,and the peak of spring flood was earlier and increased because of the large deviation between the original CFSR data and the observed data;② Compared to the observed precipitation data,the advantages of both LOCI and Gam were taken in the gamLOCI method,which could be used to correct the wet-day frequency and intensity of precipitation,standard deviation and fractile,and performed well in mountainous regions;③ Compared to the observed streamflow data,all the correction methods could be used to effectively improve the daily streamflow simulations and equally performed well in SWAT model.关键词
CFSR降水/水文模型/偏差校正/开都河流域/山区/干旱区Key words
CFSR precipitation/hydrological model/bias correction/Kaidu River Basin/arid area引用本文复制引用
田霖,刘铁,包安明,黄粤..CFSR降水数据在干旱山区水文模型中的应用——以新疆开都河流域为例[J].干旱区研究,2017,34(4):755-761,7.基金项目
千人计划——新疆项目(374231001) （374231001）
中国科学院STS项目(TSS-2015-014)资助 （TSS-2015-014）
