Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Assessment of the Coupled WRF-Hydro Model on Streamflow Simulations over the Source Region of the Yellow River

Version 1 : Received: 22 February 2024 / Approved: 28 February 2024 / Online: 28 February 2024 (13:50:42 CET)

A peer-reviewed article of this Preprint also exists.

Chen, Y.; Wen, J.; Meng, X.; Zhang, Q.; Li, X.; Zhang, G.; Chen, R. An Assessment of the Coupled Weather Research and Forecasting Hydrological Model on Streamflow Simulations over the Source Region of the Yellow River. Atmosphere 2024, 15, 468. Chen, Y.; Wen, J.; Meng, X.; Zhang, Q.; Li, X.; Zhang, G.; Chen, R. An Assessment of the Coupled Weather Research and Forecasting Hydrological Model on Streamflow Simulations over the Source Region of the Yellow River. Atmosphere 2024, 15, 468.

Abstract

The Source Region of the Yellow River (SRYR), renowned as the "Water Tower of the Yellow River", serves as an important water conservation domain in the upper reaches of the Yellow River, significantly influencing water resources within the basin. Based on the Weather Research and Forecasting (WRF) Model Hydrological modeling system (WRF-Hydro) model, the key variables of the atmosphere-land-hydrology coupling processes over the SRYR during the 2013 rainy season are analyzed. The investigation involves a comparative analysis between the coupled WRF-Hydro and the standalone WRF simulations, focusing on the hydrological response to the atmosphere. The results reveal that the WRF-Hydro model's proficiency in depicting streamflow variations over the SRYR, yielding a Nash Efficiency Coefficient (NSE) of 0.44 and of  0.61 during the calibration and validation periods, respectively. Compared to the standalone WRF simulations, the coupled WRF-Hydro model demonstrates enhanced performance in soil heat fluxes simulations, reducing the mean Root Mean Square Error (RMSE) of surface soil temperature by 0.96 K and soil moisture by 0.01 m\textsuperscript{\textsuperscript{3}}/m\textsuperscript{\textsuperscript{3}}. Furthermore, the coupled model adeptly captures the streamflow variation characteristics with the NSE of 0.33. This underscores the significant potential of the coupled WRF-Hydro model for delineating coupled atmosphere-land-hydrology processes in regions characterized by cold climates and intricate topography.

Keywords

the Source Region of the Yellow River; WRF-Hydro; the atmosphere-land-hydrology coupling processes; streamflow

Subject

Environmental and Earth Sciences, Atmospheric Science and Meteorology

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