Applied Research Of Predication Method On Aquatic Environment Of Small-Scale Shallow Lake In The City

Shallow lakes are the composition of urban infrastructure, playing an important role in the construction of ecological environment in cities. With the development of urbanization, the aquatic environment of the shallow lake has been deteriorated. It is time to take measures to harness. The regulation plan is basic and critical to the instruction on aquatic environment of shallow lakes, especially the simulation investigation is one of important technologies on the aquatic environment.Based on the project of the research on improvement of aquatic environment of inner rivers in Nanjing, both the deterministic method and probabilistic method have been applied in the paper. Firstly, the characteristics of the two methods have been generalized, then, one of deterministic method-numerical simulation has been used to simulate the hydrodynamics and water quality change tendency of CODmn of Xuanwu Lake under the condition of driving force, namely two dimensional shallow flow-pollutants coupled model have been applied and solved by finite volume method and Riemann approximate solver, one of probabilistic methods-modified GM(1,1) model has been applied to simulate the yearly change of eutrophication index TN and TP of Xuanwu Lake.The prediction method on the aquatic environment of small-scale shallow lake in the city has been discussed and applied in the paper by associating the numerical model with gray model, the paper gives the technical support on the simulated research on water environment of lakes.