Research On Total Amount Allocation Technology Of Pollutants Into The Sea

In recent years, offshore sea areas, from north to south, suffers from pollution and damages of varying degrees. In coastal cities, large amount of industrial effluents and sewage are discharged into the sea. As a result, the water quality of offshore sea areas is deteriorating and maintains a recessive richness of nutrients, which leads to increasing frequency of the Red Tide. Sustainable development of marine economy and environment has been seriously hampered.Therefore, strengthening researches on control theory and technical methods concerning the total amount of pollutants discharged into the sea, and developing a scientific, practical and operational total amount allocation technology of pollutants into the sea, will be of major significance for the protection and management of China's marine environment.After reviewing the new research developments of the total amount allocation technology of pollutants into the sea, this paper attempts to contribute to the core problem of optimization of pollutant loads on the sea and analyzes the total amount allocation technology of pollutants into the sea based on the capacity of the marine environment, making Luoyuan Bay, Fujian Province as a case where the empirical research is conducted. This paper's main conclusions are as follows:(1) Total amount allocation technology of pollutants into the seaConcerning the pollution caused by pollutants discharged into the sea, this paper studies the total amount allocation technology home and abroad. This paper surrounds its argument around the problem of optimization of pollutant loads on the sea and analyzes the total amount allocation technology of pollutants into the sea based on the capacity of the marine environment, which includes the measurement of the capacity of the marine environment, selection of the total amount allocation technologies and assessment of total amount allocation solutions. First this paper creates a numerical model to simulate the relation between hydrology water quality and attenuation and dilution of the pollutants. This paper also measures the capacity of the marine environment and maximal amount of pollutants the waters can contain using linear optimization method. Second, I will draft the solution of total amount allocation considering both land and sea situation based on the needs of the management and research, and will choose the suitable total amount allocation technology based on how much the information has been collected and the budget. At last, I will assess the allocation solutions using Gini coefficient method, so as to determine the optimal one.(2) Empirical research on Total amount allocation technology of pollutants into Luoyuan BayI will built a total amount allocation distribution model of the pollutants into Luoyuan Bay, using the capacity of marine environment as constraints, and based on MIKE mathematical models of offshore sea areas, establish a Luoyuan Bay three-dimensional hydrodynamic model using MIKE3 three-dimentional model of currents with moving boundaries developed by Danish Institute for Water Power. Utilizing this model, I will stimulate and calculate how pollutant loads influence water quality. Following the predetermined principle of hydrological conditions and distribution, I will figure out a method to calculate the capacity of marine environment of Luoyuan Bay, using the capacity of marine environment and the goal of water quality management as constraints.Taking into consideration the natural resources, social environment, economic development and other factors, I select five total amount allocation factors—environmental capacity, water resources, population, agricultural area and GDP, in order to calculate the weight coefficient using entropy method and thus to distribute the total amount of pollutants. In this way, I eventually design 5 distribution solutions of the 12 COD, TN and TP in She Hai Zi River.Analyze and assess the effectiveness and rationality of allocation solutions of pollutants into the sea using gini coefficient method, so as to select the best solution. Based on factors such as the natural environment, population and socio-economic conditions along the river, I will figure out the environment Gini coefficients of each solution by choosing two environment Gini coefficient indicators—representative population and GDP and drawing Lorenz curve between the allocations of pollutants in each solution and the above two indicators. Based on these analyses, I evaluate the fairness and efficiency of the 5 allocation solutions for 12 sub-basins, and then I determine the best one considering both aspects, i.e. the allocation of COD is 36003.92t, TN 1199.41t and TP 107.37t.Combine the best solution (solution one) and the total amount of marine aquaculture, we can get the total amount allocation for each sea area.If we rearrange the best solution (solution one) for Luoyuan Bay's 12 sub-basin according to administrative regions, we can figure out the total amount allocation for Lianjiang Town and Luoyuan Town, that is, allocation of COD in Lianjiang Town is 15065.23t, TN 508.36t and TP 46.91t, and allocation of COD in Luoyuan Town is 20938.69t, TN 691.03t and TP 60.47t. Based on these statistics, I conduct total amount allocation of offshore sea areas by equally dividing the administrative areas of villages and towns and then distribute the total amount allocation to each village and town.