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Remote Sens. 2017, 9(3), 302; doi:10.3390/rs9030302

Assessment of GPM and TRMM Multi-Satellite Precipitation Products in Streamflow Simulations in a Data-Sparse Mountainous Watershed in Myanmar

1
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, College of Hydrology and Water Resources, Hohai University, 1 Xikang Road, Nanjing 210098, China
2
Department of Meteorology and Hydrology, Office No. 5, Ministry of Transport and Communications, Naypyitaw 15011, Myanmar
*
Author to whom correspondence should be addressed.
Academic Editors: Yang Hong, Yixin Wen, Magaly Koch and Prasad S. Thenkabail
Received: 4 January 2017 / Revised: 8 March 2017 / Accepted: 20 March 2017 / Published: 22 March 2017
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Abstract

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. View Full-Text
Keywords: GPM; IMERG; TRMM; TMPA; satellite precipitation; hydrological modeling; Xinanjiang hydrological model GPM; IMERG; TRMM; TMPA; satellite precipitation; hydrological modeling; Xinanjiang hydrological model
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MDPI and ACS Style

Yuan, F.; Zhang, L.; Win, K.W.W.; Ren, L.; Zhao, C.; Zhu, Y.; Jiang, S.; Liu, Y. Assessment of GPM and TRMM Multi-Satellite Precipitation Products in Streamflow Simulations in a Data-Sparse Mountainous Watershed in Myanmar. Remote Sens. 2017, 9, 302.

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