Study On Total Capacity Control For Main Water Pollutants Of Tianjin

The total capacity control, in the field of water pollution prevent and control, is more effective than the traditional mandatory total control. At present, the calculation and allocation of water environment capacity has become one of the focuses of the water environmental management science. Aiming at the limitation of the existed researches in the scientificity, impartiality, economy and practicability of capacity calculation and allocation methods, this dissertation, combining many factors such as surface water environmental characteristic, pollution source condition and society economy development plan of Tianjin and through the integrated using of many theories and methods in different fields, proposed a new method for water environment capacity calculation and the defining of the objective of total control. Furthermore, two dimension models and spatial models based on GIS for the optimization allocation of capacity among pollution sources and industries were established. As a result, a scientific and practicable total capacity control method system for surface water's main pollutants was established.Firstly, based on the analysis of Tianjin's water environmental system, a flux calculation method of river using the capacity gone into sea was proposed for the first time. Specially focusing on the areas having the characteristics of water resource shortage, seriously polluted and intensity affected by human beings, a new method of water environment capacity calculation was put forwarded, which solved the calculation problem of Tianjin's water environment capacity.Secondly, a new formula, which can determine the objective of total capacity control of river, was put forwarded. In this section, the multiple-person cooperation game theory was introduced into the total capacity control field for the first time. Then, three kinds of optimizing allocation models, i.e. the fair method, the fair and economical method and the multiple-person cooperation method, were proposed. With these models, the minimal cost method and the revenue-subsidy method were consummated, and the allocation technology system of capacity was greatly enriched too.Thirdly, GIS was applied into the total capacity control of water pollution. Using the ArcSDE technology, a spatial geodatabase that includes many kinds of spatialinformation and attribute data was built. Based on this geodatabase, a spatial model system of the water pollution total capacity control under GIS was developed by the redevelopment in Delphi, VBA and ArcGIS environment. By applying many types of GIS function, such as buffer analyzing, linear referencing and spatial distance measuring etc, this model system could greatly increase the efficiency and precision of the total control, and had the characteristic of visibility.At last, aiming to obtain maximal economic performance under the restriction of environment, resources, industry development planning and so on, a management theory was put forwarded. In this theory, through the carrying out of the water pollution total capacity optimizing allocation among the industries, the resource optimal allocation could work harmonious with the optimal adjustment of the regional industry structure. Then, based on the water pollution total capacity control, the multi-objective optimizing allocation model of the industry capacity was built. In order to minimize the industry structure's restriction, the concept of synthetical index of industry water environment and economy was introduced in this model. Furthermore, the support vector machine (SVM) method, which was based on the statistical learning theory (SLT) and the Empirical Risk Minimization (ERM) principle, was introduced into the capacity total control field to determine the value of the synthetical index.