Developing Water-Quality Model for Jingpo Lake Based on EFDC

Water-quality model simulation is the key to understanding hydrological processes and water-quality dynamic(s). In this study, Jingpo Lake, which most typical lake in northern cold region of China, was selected as research object. A numerical for transporting diffusing chemical oxygen demand (CODMn) ammonia nitrogen (NH3N) with ice-covered open-water periods constructed calibrated using Environmental Fluid Dynamics Code (EFDC). Parameters such bottom roughness, ice diffusion coefficient, horizontal momentum diffusivity, molecular eddy viscosity, buoyancy influence CODMn decay rate NH3N were validated. The findings show that there differences hydrodynamic changing process during periods, well seasonal waterbody. parameter rates lower than those due water-temperature decline. R2 reached 90.71% 79.79%, respectively. Thus, it may be concluded EFDC could reflect changes water level transport Lake.