多卫星遥感降水产品寒区误差时空特征分析  

Alternative observation of ground stations by multiple satellite remote sensing precipitation in alpine region

作　　者：徐淑琴 丁星臣 王斌 XU Shuqin;DING Xingchen;WANG Bin(School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030,China;Key Laboratory of Efficient Utilization of Agricultural Water Resources, Ministry of Agriculture,Harbin 150030, China)

机构地区：[1]东北农业大学水利与土木工程学院,哈尔滨150030 [2]农业部农业水资源高效利用重点实验室,哈尔滨150030

出　　处：《东北农业大学学报》2017年第11期63-73,共11页Journal of Northeast Agricultural University

基　　金：国家重点研发计划项目(2016YFC0400101);国家自然科学基金资助项目(51009026);黑龙江省教育厅科学技术研究项目(12531024);农业部农业水资源高效利用重点实验室开放课题资助项目(2015002);东北农业大学农业水土工程创新团队项目

摘　　要：选取北方寒区呼兰河流域作为典型研究区,以地面雨量站及采用IDW插值方法获得的IDWP降水数据作为基准,采用多种统计学指标评估多卫星遥感降水产品在日、月、季度时间及0.05°×0.05°像元空间尺度对寒区地面降水探测精度,以SWAT模型研究其径流模拟适用性,比较TRMM最新一代3B42V7降水产品相对于3B42V6改进程度。结果表明,TRMM 3B42V7与TRMM 3B42V6相比,对流域平均及总体降水量探测均有改进,日时间尺度上,V6过低估计地面降水0.89%,而V7过高估计5.43%,月及季度时间尺度上,两者与雨量站降水量较为接近,降水强度探测方面,两者对不同降水强度区间降水发生频率均有不同程度估计,V6和V7均过高估计高强度大雨和暴雨量,分别高出21.98%、17.03%。V7对空间降水探测精度优于V6。日径流模拟方面,V7与V6相比,在寒区对径流模拟改进效果不显著,验证期二者模拟结果接近,均可应用于寒区径流模拟。CMORPH_CRT、CMORPH_RAW、PERSIANN_CDR数据在寒区评估效果较差,不宜在北方寒区推广。The Hulan River basin in the north cold region was chosen as a typical research area,precipitation stations of the ground and IDWP precipitation data obtained by IDW interpolation method were taken as the benchmark data,the detecting precision of the cold region precipitationin the daily,monthly and quarterly time and spatial scales of0.05°×0.05°pixels of the multi-satellite remote sensing precipitation products were evaluated by a variety of statistical indexes,SWAT model was used to research its applicability in runoff simulation.Compared the improvement of TRMMla test generation3B42V7precipitation product with3B42V6.The results showed that compared with TRMM3B42V6,TRMM3B42V7had been improved in the detection of average and total precipitation in the basin.On the daily time scale,V6underestimated surficial precipitationby0.89%and V7overestimated by5.43%.On the monthly and quarterly time scales,V6and V7were relatively close to the precipitation of station.In terms of precipitation intensity detection,V6and V7had estimation of different degrees on precipitation occurring frequency of different precipitation intensity ranges,V6and V7had overestimated the amount of high intensity heavy rain and rainstormby21.98%and17.03%respectively.V7was better than V6in the detection of the space precipitation.In terms of daily runoff simulation,compared V7with V6,the simulated effect of runoff in cold region was not improved greatly,simulation results of V6and V7were relatively close in the verification period,which could be both applied to the runoff simulation in cold region.The evaluated results of CMORPH_CRT,CMORPH_RAW and PERSIANN_CDR were poor in cold region,all of them should not be widely used in cold region.

关 键 词：寒区 卫星遥感降水产品 时间尺度 空间尺度 SWAT模型 日径流模拟 

分 类 号：P333.9[天文地球—水文科学]