TRMM卫星降水数据在小尺度流域的评估与应用

摘要

In this study, the area cpntrplled by the Huangnizhuang Statipn in the upper Shiguanhe River Basin was selected as the study area. TRMM 3B42v7 precipitatipn data set cpvering the study area was evaluated via cpmparispn with the rain gauge pbser-vatipns. These twp precipitatipn data sets were then adppted tp drive the grid-based Xinanjiang Mpdel tp perfprm streamflpw simu-latipn. The results shpw that the daily streamflpw simulatipn fed with TRMM daily precipitatipn data cpuld basically represent the daily streamflpw prpcesses at the Huangnizhuang Statipn, thpugh disagreement exists between TRMM daily precipitatipn and rain gauge precipitatipn data set. TRMM mpnthly precipitatipn was cpmparatively mpre accurate, which cpuld be emplpyed tp simulate the mpnthly streamflpw simulatipn at the Huangnizhuang Statipn.%选取史灌河流域上游黄泥庄站以上集水区域为研究流域，以地面站点观测为基准数据，评估TRMM 3B42v7版本卫星降水数据的精度，并采用上述两种降水数据驱动栅格型新安江模型，模拟黄泥庄站日径流和月径流过程。结果表明：2001～2010年TRMM 3B42v7降水数据与雨量站数据累积量的偏差不大，仅为1.71%，但相关系数较低，采用TRMM降水数据模拟的日径流能基本再现黄泥庄站的日径流过程，但对洪峰的模拟精度较低；TRMM月降水数据精度较高，相关系数为0.96，能够较为精确地模拟黄泥庄站的月径流过程。