Applied Research Of 2-Demension Water Quantity And Water Quality Coupled Model Of Shallow Lake In The City

As one of the components of the basic establishments, shallow lake plays an important role in the construction of ecological environment in the cities. With the development of urbanization, the aquatic environment of shallow lake has become worse and worse. Therefore, it is high time to take some measures to amend the aquatic environment. There are many plans in improvement of the aquatic environment. Among of them, simulation of the aquatic environment is an important measure.In this paper, two dimensional shallow flow—pollutants coupled model, which applies uninstructed grid finite volume method and Riemann approximate solver, is used to gain the trend of hydrodynamics and water quality(TN and TP) change under the condition of driving force. Mechanism of nitrogen and phosphorous circle of WASP5 is considered in the water quality part of the model according to nutrition actuality of shallow lake in the cities.Xuanwu Lake is object of research in this paper. Moreover, the change characteristics of hydrodynamics and nutritional facts of Xuanwu Lake are simulated in terms of three transportation schemes. As can be Seen from the results , the relative fall of nitrous concentration and phosphoric concentration, are educed after that all simulate figures are analyzed rationally.The change trend of hydrodynamics and water quality(TN, TP)is researched under the condition of driving force both increased transportation water and wind field considered in order to farther research.