Dynamical Analysis Of Nitrogen And Phosphorus Transport In Wetlands

Accompany with the economic development, the environment problem presents to turn increasingly. Threatens and lessons caused by environmental pollution, make us recognize and consider the relations between environment and social development over again. It makes us put forward sustainable development strategy, too. The study on environment science is transforming from statistic to quantification. Therefore, to promote the development of cross-subjects and adapt to the needs of human practical activity, modern mechanics must consider the motion law of mechanical movement, physics, chemistry, organism activity, systematically.Constructed wetland is one of wastewater treatment systems, and is widely used in the water purification field. The process of solute transport contains physics, chemistry and biology, and establishes material and energy dynamic system of water, water-sediment interface, porous media. The process of solute transport and the retardation effect of soils affect the quality security of shallow groundwater and surface water, directly. The paper establishes dynamic systems and mathematical models of solute transport and transformation process in lake wetlands, which contain overlying water, water-sediment interface, porous medium environments (groundwater environments). Then, the paper discusses nonlinear dynamic model of overlying water, dynamic model of solute transport and transformation process in porous media, and absorption-desorption item.The numerical simulation of solute transport in lake wetlands has been processed by edit procedures on computer. Discussion on solute transport and transformation process in lake wetlands, supplies scientific therapy according for nutrients circulation, provides strongly theory support and technical guarantee for the water eutrophication disposal and wetland soil quality evolution. Based on the simulation and modeling, parameters of dynamic equations are discussed at the same time.