Water Environmental Dynamic Optimization Management Of Songhua River In Jilin Province

In recent years, our country in the recycling economy, clean production technology and environmental laws and regulations and so has intensified, and surface water point source pollution has largely been curbed, however, surface water pollution is still severe, deterioration of water environment have not been fundamentally reversed, non-point source pollution has become a major source of pollution of surface water. Songhua River in Jilin Province to achieve the water quality control objectives of each section is still less than half of the basin water management decision-making and implementation of a lack of technical support, comprehensive solution to water pollution problems requires a long time, therefore, to carry out dynamic optimization of water environment of the Songhua River Management is imminent.This article, based on previous studies, constructes a dynamic optimization of water environment management model, according to different water period, calculates the dynamic parameters of water environment, following the dynamic technical characteristics; according to different stages of valley's socio-economic development, designs dynamic optimization of water environment management plan, which reflects the dynamic management of management mentality. The model is used in the dynamic optimization of chemical oxygen demand management issues of the Songhua River in Jilin Province, and acquired a relatively satisfactory result.This article countes and analyzes the amount of point source pollution and surface water monitoring data of the Songhua River in Jilin Province in 2006-2009, fully considered the impact of non-point source pollution, according to different water period, calculates attenuation coefficient of COD, and figure out the result of the COD of the attenuation coefficient (K) of the Songhua River in Jilin Province River monitoring sections:high water period 0.15～0.342/d, low period 0.01～0.13/d, the normal period 0.01～0.17/d. The monitoring sections attenuation coefficients lay a good foundation for non-point source pollution of surface water load.In this paper, one-dimensional mathematical model based on the water environment, the use of COD attenuation coefficient calculated above, and seek out the Songhua River in Jilin chemical oxygen demand load of non-point source pollution in the Songhua River as the total 182.54m3/s; use of the attenuation coefficient method of surface water total load of non-point source pollution is more accurate closer to the actual non-point source surface water pollution load.The article coveres non-point source pollution response coefficient of dynamic input and simplifies the calculation of input response coefficient matrix, the multi-objective management problem into a linear programming model, building covering non-point source pollution of surface water environment, dynamic optimization Management model, and according to different stages of social and economic development Basin are designed for dynamic optimization of water environment management plan, reflecting the dynamic management of management ideas.Through the Dynamic Optimization Model for Environmental to determine the Songhua River to solve dynamic optimization of water environment management of the three programs.Plan I (2010-2012):the point source sewage discharge standards, water quality compliance monitoring section rate was 80.6%;planⅡ(2012-2015):To meet the point source sewage discharge standards, while the implementation of GB18918-2002 "municipal wastewater treatment plant emission standards"to monitor water quality compliance rate was 97.2% section;planⅢ(2015-2020): Three out of the Songhua Lake National Nature Reserve, protection, and Jilin, Changchun, Matsubara emissions of the three cities could be considered accidents, the overall planning of the Songhua River, on the point source and non-Comprehensive control of the concentration of point sources, the ideal goal is to make the break before the emission of pollution incidents aside to accept a certain capacity, that is, when the pollutants reach the river section of the mixing section of not more than 70% of the water quality control objectives. The proper control of non-point source pollution emissions concentration based on the Songhua River, three lakes and to ensure that tourist facilities in protected areas of sewage discharge standards, water quality compliance monitoring section was 100%.The final conclusion from this research:recent four years's point sources pollution COD average annual value of Songhua River is 159739t/a, nonpoint sources pollution is 777336t/a, counts for 17 & 83 percent of COD discharge amount respectively, nonpoint sources pollution has been the main pollution sources.Because it is quiet difficaut to control nonpoint sources pollution, the plan should be gave priority to point source and urban sewage discharging within controlling index of national standard for water environmental dynamic optimization management. Point source and urban sewage discharging within controlling index of national standard,reducing 22% of the current situation's point pollution(35217t/a), will make 97.2% of the monitoring sections of all the water period's index meeting the requirements. Even if individual sections can not meet the water quality standard, it also enables the next section meeting the water quality standards, and will make the border river section to meet its water standards. Therefore, we should make sure point source discharging within controlling index of national standard as soon as possible, by constructing sewage treatment works. In addition,in oder to make all the monitoring sections's index of all the water period meeting the requirements, only requiring the concentration control of point source pollution and non-point source pollution control of a minority of the concentration without decreasing quantity of wastewater effluent, it is also the most optimalest management program.In conclusion, this article takes both the water environmental parameters of different water periods and the management programs for different stages of socio-economic development into consideration, improves the dynamics of water environmental parameters and optimization management programs in the former model of surface water environment optimal management, simplifies the calculation of input response coefficients matrix, making the water environment optimization management,which takes both point and non-point source pollution into consideration, easier to achieve.