Predictive Simulation Study on the Effect of Small and Medium River Basin Outfall Treatment Measures on Water Quality Improvement

In recent years, the problem of water pollution in middle and small river basins has become increasingly serious. order to control small- medium-sized rivers, based upon hydrodynamic module quality MIKE21, this paper established a numerical computing model for by taking Xiyong River Basin as typical representative. The excessive levels nitrogen have significantly impaired terms status, so seven different scenario hypotheses treatment measures are proposed, on which simulation total (TN) concentration’s movement was implemented time concentration reach standard predicted. results showed that improved after measure, annual mean TN will decrease 0.496 mg/L. help government sources medium basins. research MIKE21 can be used basis reduction improvement, provides an example ecological restoration rivers.