Assessment of GPM and TRMM Multi-Satellite Precipitation Products in Streamflow Simulations in a Data-Sparse Mountainous Watershed in Myanmar
Assessment of GPM and TRMM Multi-Satellite Precipitation Products in Streamflow Simulations in a Data-Sparse Mountainous Watershed in Myanmar
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缅甸数据稀疏的山区流域水流模拟中 GPM 和 TRMM 多卫星降水产品的评估
DOI：
10.3390/rs9030302
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发表时间：
2017-03
期刊：
影响因子：
5
通讯作者：
Liu Yi
中科院分区：
文献类型：
--
作者：
Yuan Fei;Zhang Limin;Win Khin Wah Wah;Ren Liliang;Zhao Chongxu;Zhu Yonghua;Jiang Shanhu;Liu Yi
全球降水测量使命及其前身热带降雨测量使命（TRMM）的卫星降水产品是无资料流域水文应用的关键数据来源。本研究对GPM综合多卫星反演（IMERG）最终运行和TRMM多卫星降水分析3B42V7降水产品的性能进行了初步和早期评估，并评估了其在缅甸钦敦河流域径流模拟中的可行性，从2014年4月到2015年12月。结果表明，IMERG和3B42V7虽然能够潜在地捕捉到历史降水的时空格局，但这两种产品包含相当大的误差。与3B42V7相比，IMERG无显著改善。此外，3B 42 V7在每日和每月尺度以及五分之四的大雨检测方面均优于IMERG。IMERG和3B42V7的大误差明显地传播到新安江水文模型的径流模拟中，显著低估了总径流和高流量。卫星降水的偏差修正有效地改善了径流模拟。基于3B42V7的径流模拟比基于量规的模拟表现得更好。在一般情况下，IMERG和3B42V7是可行的，在研究区的径流模拟中使用，虽然3B42V7是更适合于IMERG。
Satellite precipitation products from the Global Precipitation Measurement (GPM) mission and its predecessor the Tropical Rainfall Measuring Mission (TRMM) are a critical data source for hydrological applications in ungauged basins. This study conducted an initial and early evaluation of the performance of the Integrated Multi-satellite Retrievals for GPM (IMERG) final run and the TRMM Multi-satellite Precipitation Analysis 3B42V7 precipitation products, and their feasibility in streamflow simulations in the Chindwin River basin, Myanmar, from April 2014 to December 2015 was also assessed. Results show that, although IMERG and 3B42V7 can potentially capture the spatiotemporal patterns of historical precipitation, the two products contain considerable errors. Compared with 3B42V7, no significant improvements were found in IMERG. Moreover, 3B42V7 outperformed IMERG at daily and monthly scales and in heavy rain detections at four out of five gauges. The large errors in IMERG and 3B42V7 distinctly propagated to streamflow simulations via the Xinanjiang hydrological model, with a significant underestimation of total runoff and high flows. The bias correction of the satellite precipitation effectively improved the streamflow simulations. The 3B42V7-based streamflow simulations performed better than the gauge-based simulations. In general, IMERG and 3B42V7 are feasible for use in streamflow simulations in the study area, although 3B42V7 is better suited than IMERG.
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影响因子：
5.4
作者：
Wei Chu;Xiaogang Gao;S. Sorooshian
通讯作者：
Wei Chu;Xiaogang Gao;S. Sorooshian
影响因子：
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作者：
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Daqing Yang;B. Ye;A. Shiklomanov
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3.8
作者：
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通讯作者：
E. Nikolopoulos;E. Anagnostou;M. Borga
影响因子：
3.8
作者：
F. Su;Y. Hong;D. Lettenmaier
通讯作者：
F. Su;Y. Hong;D. Lettenmaier