Simulation of Nitrogen and Phosphorus Removal in Ecological Ditch Based on EFDC Model

3rd International Conference on Energy Equipment Science and Engineering

Li, S.M.^1,2 ; Wang, X.L.^2 ; Zhou, Q.Y.^1 ; Han, N.N.^1

Department of Water Conservancy Engineering, Tianjin Agriculture University, Tianjin

300384, China^1

State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, China^2

关键词: Agricultural non-point source pollutions;    Average relative error;    Environmental factors;    Influent concentrations;    Nitrogen and phosphorus;    Nitrogen and phosphorus removal;    Transport and diffusions;    Water quality modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/128/1/012023/pdf
DOI  :  10.1088/1755-1315/128/1/012023

来源: IOP

【 摘 要 】

Agricultural non-point source pollution threatens water quality and ecological system recently. To control it, the first and most important task is to control the migration and transformation of nitrogen and phosphorus in the agricultural ditches. An ecological ditch was designed, and according to the design a pilot device was built, the mechanism of N and P removal in ditches under the collaboration of aquatic organisms-hydraulic power was studied through the dynamic and static experiments, in order to find out the specific influences of different environmental factors such as influent concentration, influent flow and water level. The transport and diffusion of N and P in the ditch was simulated by a three dimensional water quality model EFDC, the simulation results and the experimental data were compared. The average relative errors of EFDC model simulated results were all less than 15%, which verified the reliability of the model.