**Dongxiao Yin 1, Z. George Xue 1,2,3,\*, David J. Gochis 4, Wei Yu 5, Mirce Morales <sup>6</sup> and Arezoo Rafieeinasab <sup>4</sup>**


Received: 18 April 2020; Accepted: 24 June 2020; Published: 26 June 2020

**Abstract:** A soil erosion and sediment transport model (WRF-Hydro-Sed) is introduced to WRF-Hydro. As a process-based, fully distributed soil erosion model, WRF-Hydro-Sed accounts for both overland and channel processes. Model performance is evaluated using observed rain gauge, streamflow, and sediment concentration data during rainfall events in the Goodwin Creek Experimental Watershed in Mississippi, USA. Both streamflow and sediment yield can be calibrated and validated successfully at a watershed scale during rainfall events. Further discussion reveals the model's uncertainty and the applicability of calibrated hydro- and sediment parameters to different events. While an intensive calibration over multiple events can improve the model's performance to a certain degree compared with single event-based calibration, it might not be an optimal strategy to carry out considering the tremendous computational resources needed.

**Keywords:** WRF-Hydro; CASC2D-SED; Goodwin Creek Experimental Watershed; NLDAS-2; calibration
