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Evaluating precipitation products for hydrologic modeling over a large river basin in the Midwestern USA
Authors:Jingrui Wang  Ganming Liu
Institution:1. Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, Indiana, USA;2. College of Water Sciences, Engineering Research Center of Groundwater Pollution Control and Remediation of Ministry of Education, Beijing Normal University, Beijing, ChinaORCID Iconhttps://orcid.org/0000-0002-4947-7614;3. School of Earth, Environment and Society, Bowling Green State University, Bowling Green, Ohio, USA
Abstract:ABSTRACT

We evaluated precipitation estimates, TRMM (Tropical Rainfall Measuring Mission 3B42V7), CFSR (Climate Forecast System Reanalysis), GHCN-D (Global Historical Climatology Network-Daily Version 3.24), and Daymet, using the Soil and Water Assessment Tool (SWAT). The suitability and quality of TRMM, CFSR and Daymet in forcing the SWAT-based hydrological model was examined by means of model calibration. A calibrated TRMM-driven model slightly overestimated streamflow, while a calibrated CFSR-driven model performed worst. The Daymet-driven model performance was as good as the GHCN-D-driven model in reproducing observations. In addition, the temperature was far less sensitive compared with precipitation in driving SWAT. TRMM 3B42V7 showed great potential in streamflow simulation. The results and findings from this study provide new insights into the suitability of precipitation products for hydrological and climate impact studies in large basins, particularly those in typical climates and physiographic settings similar to the Midwestern USA.
Keywords:precipitation  Wabash River Watershed  hydrological model  SWAT  Tropical Rainfall Measuring Mission (TRMM)  Climate Forecast System Reanalysis system (CFSR)  Daymet  calibration
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