Study On The Simulation Of Water Environment System In Tieling Section Of Liao River

Water is commonly considered as not only a strategically basic resource that supporting the coordinated and healthily sustained development of regional society and economy, but also a factor that containing the sustainable benign cycle between the regional ecosystem and the environment. The healthy development of water environment relates to the sustainable development of society and economy, and the survival of mankind. Research on the relationship between development policy of regional society and economy and water pollutants, has great significance to the guidance for correct development policy-making of regional economy, and the maintenance of social healthy development.Water environmental system is a complicated nonlinear system. System dynamic method based on feedback theory is adopted in this paper. The system structure as the key gist, factors such as population, economy, resource and environment are fully considered. On account of the characteristics of regional point source and non-point source pollution, proper parameters are selected to establish system dynamic model, including social, economic, resource and environmental subsystems.The city of Tieling as an example, with the systemic analysis, social and economic development status and water resource utilization of the survey region are analyzed. Parameters can be set up based on consumption structure of production water, domestic water and ecological water, and basic data about water consumption, pollution sources and relevant social and economic information. Through the designed scheme, the influences of development policy of society and economy on water pollutants are depicted quantitatively, which accomplishes the simulation of evolution and respond relation between social and economic development and water ecological environment of Tieling city. The result shows that until 2010, with the current development pattern unchanged, the shortage of water resource reaches up to 1.113 billion cubic meters, water consumption is 2.1 times as much as that in 2007, and contamination level is 1.66 times the level of 2007. However, after adjusting the industrial structure and development pattern, increasing scientific and technical input, improving water use efficiency, and strengthening pollution control, until 2010, contamination level is only 1.07 times the level of 2007, and water availability increases by 105 million cubic meters. Source and composition of regional pollutants in Tieling city are also analyzed in this paper. Finally, policy suggestions for regional sustainable development and measures for prevention and control of non-point source pollution are put forward.