Correlation Analysis And Countermeasure Research Of Luoyuan Bay Heavy Metal Environment With Coastal Industrial Layout

Luoyuan Bay, located in northeast part of Fujian Province. Because of the ability berthing300,000-ton ship at all weather it is rare natural deep-water harbor of China. It is also an important potential region of marine economy development on the west side of Taiwan Straits. Recent years as a series of plans enter stage of implementation, such as Fuzhou Marine economy strong city construction plan (2006-2011), the twelfth five-year plan for region economic and social development plan (2011-2015) of Luoyuan, the marine economic of Luoyuan Bay leaps and bounds. It builds the port industrial system led with energy, metallurgy and shipbuilding. The new pattern of port industrial promoting economic development has conformed. The port region of Luoyuan Bay includes six parts, such as Shiqi, Bili, Niukeng Bay, Jiangjun Hat, Lian ao and Kemen, etc. The plant surround Luoyuan Bay has already put into operation or under construction, that include thermal power plant of Luneng and Huaneng, steel plant of Yixin, Desheng, and Sanjin, and the largest ship repair plant of Fujian, East China shipyard. The development of these industries brings threat to the light pollution, strong environment-dependent industry, such as aquaculture, tourism. The growing threat to the marine environment will be brought by the metallurgy, energy plant’s production capacity expansion, and port logistics, ship building industry developing.Against the above background, this study quantitatively analyzes the coastal Industrial Layout by using AHP-SWOT Strategy analysis and ecosystem services value assessment method. The ecosystem services value of Luoyuan Bay up to￥2.948billion, and most of that reflected in aquaculture which vigorously developed in the bay. Luoyuan Bay has significant geographical advantages for marine economic development, but the new industrial layout round the bay consumes more resource, and poses threats to the aquaculture industry. Especially heavy metal pollution widely exists in the industries such as metallurgy, thermal power. So heavy metal should become key issue in the environment protection and management of Luoyuan Bay. The development of port-surrounding industry cluster will lead to environmental quality changes in Luoyuan Bay. In May2011, investigate and evaluate the heavy metal environment by field monitoring. By comparing with the earlier survey data, Because element Ni shows activate geochemistry performance, and element Pb concentration increases significantly, so select them to be the subsequent research objects. The selection also correlates with the industry layout of Luoyuan Bay.By using FVCOM numerically simulates the hydrodynamic environment in Luoyuan Bay, and the flow field is the foundation of heavy metal transport model research. Then establishes the heavy metal distribution model and simulates the distribution of Pb、Ni concentration field. The simulation is verified to be reliable by compared with the survey data. By using the heavy metal multiphase migration model and total considering the physical, chemical, biological self-purification, the environmental capacity of Luoyuan Bay is0.545t/d (Pb as representative). Physical self-purification which drove by water exchange is the major part of the self-purification process. By calculating the quantity of element Pb into Luoyuan Bay, it shows the bay has sufficient heavy metal (Pb) environment capacity when discharge strictly according to the standard.Based on the characteristics such as depth, coast line of the drainage area simulates the sewage outfall emission. Heavy metal transport model and high order numerical scheme are used in the simulation process. The sewage outfall should arrange in the area which with sufficient depth, hydrodynamic condition and also the depth changes smoothly. According to the sewage outfall layout principle, there are three main outfalls arranged in Gangyu, Kemen, and Baishui of Luoyuan Bay, the pollution holding capacity of each outfall is0.147,0.134, and0.016t/d.In order to further understand the changes of heavy metal environment and provide reference to the environmental management, based on the current background value numerically predicts the elements (Pb, Ni) concentration distribution in Luoyuan Bay. In the predication, the outfall sewage quality complies with third category of the water standard. After three months, large area of the elements (Pb, Ni) concentration beyond first category of the water standard, and the case becomes worse after five months simulation. Integrated with the analysis, simulation, and prediction of the heavy metal environment in Luoyuan Bay, and also refer to the industrial layout, the Bay should be divided into five parts, and each part carries out environmental protection and management separately.