基于TRMM数据的日流量过程模拟
首发时间:2011-11-25
摘要:选取赣江上游峡山站以上集水区域为研究区域,以雨量站观测数据为基准数据,评估热带降雨观测计划TRMM(Tropical Rainfall Measuring Mission)3B42V6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,模拟赣江峡山站日流量过程。结果表明,TRMM日降水数据较雨量站数据存在较大偏差,但仍然在可接受的范围内,采用该数据模拟的日流量能基本再现峡山站的日流量过程。TRMM月降水数据精度较高,在无资料地区的水资源估算、水资源评价与规划等相关研究和工作具有广阔的应用前景。
关键词: 热带降雨观测计划(TRMM) 新安江模型 日流量过程模拟
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Watershed Daily Streamflow Process Simulation Based on TRMM multi-satellite precipitation data
Abstract:This study evaluate the accuracy of precipitation measured by one of the products of Tropical Rainfall Measuring Mission, and then input the precipitation data to a distributed hydrological model in order to rainfall-runoff simulation to study the performance of the data when it is used in basin scale hydrologic forecast. Accuracy evaluation of TRMM data based on grid scale while use Rainfall observation data for reference. Build grid based Xin'AnJiang model that with three runoff components based on Digital Elevation Drainage Network Model, and use the two kinds of precipitation data to driven the hydrologic model respectively to simulate daily streamflow process. The analysis show that the monthly TRMM precipitation has higher precision relative to the daily TRMM precipitation. However, the latter is also acceptable. Results indicate that the TRMM data can be used as the base data for hydrologic forecasting work.
Keywords: Tropical Rainfall Measuring Mission, Xinanjiang model, Daily streamflow process
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