| Water is not only the source of life, but also the resources of social development and human necessary for life. With the rapid development of China’s social and economic and the growing utilization of water resources, Waste water emissions are increasing, while the water environment capacity is limited. Once over a certain limit,the water intended function will be lost. In 2011,the most stringent water management system is pursuing, it’s the rational use of water self-purification ability, the scientific control emissions of pollutants, and the effective key technical to governance water environment that accurately defining the water environmental capacity.Huntai River originates in the east of Liaoning Province, is mainly composed of the Hun River and Taizi River, with basin area of about 25,400 km2, is an important industrial agriculture and political and cultural distribution of Liaoning Province, flows through the 25 counties of 9 City of Liaoning Province. At the time guarantying the region’s water supply, Huntai River Accept a large number of industries, agriculture and urban domestic waste water from Fushun, Shenyang, Benxi, and Liaoyan. The total amount of pollutants in some reach exceeds the water environment capacity of the river, resulting in the water quality of the Huntai River presented the Ⅴ, referring to the national "Surface Water Environmental Quality Standard"(GB3838-2002). Most water function area lost their aims.In this paper, Huntai river as the study area, based on the water function zoning district, Huntai river water for environmental issues, and regional characteristics,summarized and comparative analysis of domestic water environmental capacity approach, coupled linear programming method and hydrodynamic and water quality model calculates the Huntai River water environmental capacity, specific research contents and results are as follows:1. Based on much literature review, the system summarizes formula, model trial and error method, linear programming method, probabilistic dilution model method,advantages and disadvantages of blind number theory method, the use of the actual situation for too muddy river, selection of linear programming for regional water environment capacity calculation.2. On the basis of precise analysis of different spatial Hun River, water quality evaluation results of different elements, considering the outfall of the critical control section, the innovative power of water quality model coupled with the linear programming method to calculate the water environment of the study area capacity.3. Based on the above coupling method, calculated at the design hydrological conditions Hun River water environmental capacity of COD is 24756 t / a, ammonia water environmental capacity of 1528 t / a.4. By comparing these results with the Hun River Status emissions into the river and analyze various functional areas Hun River water environment change contrast,Hun River water to verify the seriousness of environmental problems. And compare 15 years ago, "integrated river basin planning", COD and ammonia water environmental capacity of the present study is much smaller than the corresponding results of integrated planning calculations, the core reason is that this research method is based on functional area of each water outfall distributed computing each outfall The following river water environment capacity, and each outfall outfall above the river is unable to take advantage of the water environment. The present study is more in line with the most stringent water management system is no longer new sewage outfall into the river management policy, may provide a scientific basis for the future control of the total amount of sewage into the river basin. Capacity also Basin water environment to provide a reference. |
