Evaluation of TRMM Multisatellite Precipitation Analysis (TMPA) and Its Utility in Hydrologic Prediction in the La Plata Basin
Evaluation of TRMM Multisatellite Precipitation Analysis (TMPA) and Its Utility in Hydrologic Prediction in the La Plata Basin
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DOI：
10.1175/2007jhm944.1
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发表时间：
2008-08
影响因子：
3.8
通讯作者：
F. Su;Y. Hong;D. Lettenmaier
中科院分区：
文献类型：
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作者：
F. Su;Y. Hong;D. Lettenmaier
摘要基于卫星的降水估计具有高的空间和时间分辨率和大面积的覆盖范围提供了一个潜在的替代来源的强迫数据的水文模型在传统的原位降水测量是不容易获得的地区。南美洲的拉普拉塔盆地提供了一个很好的例子，说明利用卫星获得的降水量可能是有益的。本研究通过与现有的测量数据和应用于拉普拉塔流域的可变渗透能力（维克）半分布式水文模型进行比较，评估了9年（1998-2006年）热带降雨测量使命（TRMM）多卫星降水分析（TMPA; 3B 42 V.6）的流域降水估计。一般而言，TMPA估计值与每月时间尺度的网格化仪表数据吻合良好，这很可能是因为在TMPA中对仪表进行了每月调整。TMPA和雨量器降水估计值之间的一致性在日时间尺度上有所降低。
Abstract Satellite-based precipitation estimates with high spatial and temporal resolution and large areal coverage provide a potential alternative source of forcing data for hydrological models in regions where conventional in situ precipitation measurements are not readily available. The La Plata basin in South America provides a good example of a case where the use of satellite-derived precipitation could be beneficial. This study evaluates basinwide precipitation estimates from 9 yr (1998–2006) of Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation Analysis (TMPA; 3B42 V.6) through comparison with available gauged data and the Variable Infiltration Capacity (VIC) semidistributed hydrology model applied to the La Plata basin. In general, the TMPA estimates agreed well with the gridded gauge data at monthly time scales, most likely because of the monthly adjustment to gauges performed in TMPA. The agreement between TMPA and gauge precipitation estimates was reduced at daily time scal...