TRMM/GPM和StageⅣ降水产品在小流域水文模拟效用评估  

Assessment of accuracy and runoff simulation of TRMM/GPM and StageⅣprecipitation products in small watershed

作　　者：冯克鹏[1,2,3] 田军仓 洪阳[4] 唐国强 阚光远[5] 罗翔宇 FENG Kepeng;TIAN Juncang;HONG Yang;TANG Guoqiang;KAN Guangyuan;LUO Xiangyu(School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan, Ningxia 750021, China;Ningxia Research Center of Technology on Water-saving Irrigation and Water Resources Regulation, Yinchuan, Ningxia 750021, China;Engineering Research Center for Efficient Utilization of Water Resources in Modern Agriculture in Arid Regions, Yinchuan, Ningxia 750021, China;School of Civil Engineering and Environmental Science, University of Oklahoma, Norman, OK 73072, USA;State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China)

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川750021 [2]宁夏节水灌溉与水资源调控工程技术研究中心,宁夏银川750021 [3]旱区现代农业水资源高效利用教育部工程研究中心,宁夏银川750021 [4]俄克拉荷马大学土木工程与环境科学学院,美国俄克拉荷马州诺曼73072 [5]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《排灌机械工程学报》2021年第4期397-403,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：宁夏回族自治区重点研发计划重大科技项目(2018BBF02022);宁夏高等学校一流学科建设项目(NXYLXK2017A03);国家重点研发计划项目(2018YFC0408104)。

摘　　要：以地面观测降水作为参照,在美国俄克拉荷马州Little Washita River流域,对比分析了TRMM 3B42 V7,GPM-IMERG卫星降水和StageⅣ雷达降水的精度,并用这3种降水产品驱动CREST分布式水文模型,评估了其水文模拟效用.研究表明:3种降水产品与地面降水的相关系数均大于0.5,通过了0.05置信水平检验;GPM-IMERG和TRMM 3B42 V7卫星降水对无雨和微雨存在低估,对大雨和暴雨存在高估;总体上,StageⅣ降水精度最好,其次GPM降水精度优于TRMM 3B42 V7.在水文模拟效用评估中,设定相同率定期,分别使用3种降水产品率定CREST模型参数,得到率定参数集后,在相同验证期对流域日径流过程进行模拟.对比结果表明:StageⅣ雷达降水在小流域水文模拟中效果最好,GPM-IMERG次之,TRMM 3B42 V7模拟效果不理想.The accuracy of TRMM 3B42 V7,GPM-IMERG satellite precipitation,and StageⅣradar precipitation was compared and analyzed in the Little Washita River Basin,Oklahoma,the USA,using ground observation precipitation reference.The CREST,a distributed hydrological model,was driven by these three precipitation products and evaluated its hydrological simulation utility.The research shows that the correlation coefficient among the three kinds of precipitation products and ground preci-pitation is more significant than 0.5,and passed the 0.05 confidence level test.GPM-IMERG and TRMM 3B42 V7 precipitation have the underestimation of no rain and light rain,and the overestimation of heavy rain and violent rain.In general,StageⅣhas the best precision,and,GPM precipitation accuracy is better than TRMM 3B42 V7.In the hydrological simulation utility evaluation,the same calibration period was set and the CREST model parameters were calibrated using three kinds of precipitation products.After the set of parameters was obtained,the basin′s daily runoff process was simulated in the same validation period.The comparison results show that StageⅣradar precipitation has the best effect in small watershed hydrological simulation,followed by GPM-IMERG,but TRMM 3B42 V7 simulation effect is not ideal.

关 键 词：小流域 Little Washita River流域 TRMM GPM StageⅣ CREST模型 水文模拟 

分 类 号：S277.9[农业科学—农业水土工程] TV11[农业科学—农业工程]