基于TRMM卫星测雨产品的流域水文模拟研究
首发时间:2007-11-29
摘要:采用偶发事件表法评价了TRMM卫星测雨产品3B42的测雨精度,并用3B42驱动新安江模型,模拟了淮河息县站1998~2003年的径流量过程。结果表明TRMM测雨产品对小雨、中雨的测量值一般偏大;对大雨、暴雨的测量值一般偏小。对月径流的模拟效果较好,Nash效率系数达到了0.823;对日径流的模拟效果相对较差,但峰现期模拟结果与实测值吻合较好。TRMM卫星测雨产品可以进行无资料或资料稀缺地区的月流量过程模拟和洪水峰现期的预报。
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Study on hydrologic simulation based on TRMM satellite
Abstract:The precision of TRMM satellite product 3B42 was verified firstly with Contingency Table Approach. And 3B42 was used to drive Xinanjiang model to simulate discharge at Xixian station of the upper Huaihe River Basin. The results show that the measured rainfall value of TRMM is generally larger than that at rain-gauges for light and moderate rain, while get smaller rainfall for heavy rain. And the 3B42-driven model results indicate that TRMM gets good simulation result for monthly discharge simulation, and the corresponding Nash coefficient is about 0.823. Although TRMM gets poor performance for daily discharge simulation, it can forecast flood peak time well. Therefore, 3B42 can be used to simulate monthly discharge and forecast flood peak time in ungauged or poorly gauged river basins.
Keywords: TRMM, Xinanjiang model, hydrologic simulation, Huaihe River Basin
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No.1663885135119630****
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