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Article

Sensitivity of Distributed Hydrologic Simulations to Ground and Satellite Based Rainfall Products

1
Department of Civil and Environmental Engineering, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
2
Department of Geological Sciences, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
*
Author to whom correspondence should be addressed.
Water 2014, 6(5), 1221-1245; https://doi.org/10.3390/w6051221
Received: 19 February 2014 / Revised: 13 April 2014 / Accepted: 25 April 2014 / Published: 7 May 2014
(This article belongs to the Special Issue Advances in Remote Sensing of Flooding)
In this study, seven precipitation products (rain gauges, NEXRAD MPE, PERSIANN 0.25 degree, PERSIANN CCS-3hr, PERSIANN CCS-1hr, TRMM 3B42V7, and CMORPH) were used to force a physically-based distributed hydrologic model. The model was driven by these products to simulate the hydrologic response of a 1232 km2 watershed in the Guadalupe River basin, Texas. Storm events in 2007 were used to analyze the precipitation products. Comparison with rain gauge observations reveals that there were significant biases in the satellite rainfall products and large variations in the estimated amounts. The radar basin average precipitation compared very well with the rain gauge product while the gauge-adjusted TRMM 3B42V7 precipitation compared best with observed rainfall among all satellite precipitation products. The NEXRAD MPE simulated streamflows matched the observed ones the best yielding the highest Nash-Sutcliffe Efficiency correlation coefficient values for both the July and August 2007 events. Simulations driven by TRMM 3B42V7 matched the observed streamflow better than other satellite products for both events. The PERSIANN coarse resolution product yielded better runoff results than the higher resolution product. The study reveals that satellite rainfall products are viable alternatives when rain gauge or ground radar observations are sparse or non-existent. View Full-Text
Keywords: satellite rainfall; NEXRAD; runoff; streamflow; GSSHA satellite rainfall; NEXRAD; runoff; streamflow; GSSHA
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MDPI and ACS Style

Chintalapudi, S.; Sharif, H.O.; Xie, H. Sensitivity of Distributed Hydrologic Simulations to Ground and Satellite Based Rainfall Products. Water 2014, 6, 1221-1245. https://doi.org/10.3390/w6051221

AMA Style

Chintalapudi S, Sharif HO, Xie H. Sensitivity of Distributed Hydrologic Simulations to Ground and Satellite Based Rainfall Products. Water. 2014; 6(5):1221-1245. https://doi.org/10.3390/w6051221

Chicago/Turabian Style

Chintalapudi, Singaiah, Hatim O. Sharif, and Hongjie Xie. 2014. "Sensitivity of Distributed Hydrologic Simulations to Ground and Satellite Based Rainfall Products" Water 6, no. 5: 1221-1245. https://doi.org/10.3390/w6051221

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