Numerical simulation of COD concentration distribution in Yanming 2# lake based on MIKE 21

摘要

With the development of industry and urban population,the river water is rapidly deteriorating.The water environment problem solving is imminent.In the paper,the MIKE21 is used to simulate COD concentration distribution of Yanming 2# lake,based on Hydrodynamics module (HD) and Advection-Diffusion module (AD).According to the contrast results with the filed actual measured data in 2008,the relative error is low,so simulate result is reasonable and reliable.Through the simulation result,flow velocity is large in the inward and outward,COD concentration is closely related with the flux and concentration in the inward area,and it is affected by seasonal influence,which is the highest in winter and lowest in spring.