Groundwater Pollution Prevention And Control Management Model In The Devonian Karst Area Of ??Yunnan Anning Refinery

With the changing of environment over the years,people's demand for the groundwater is growing.The groundwater resources from karst areas as the main using water sources for living and production is more vulnerable to pollution because of its fast cycle and short cycle.so it's of great realistic significance to protect it from contamination.The use of numerical simulation model to research the groundwater resources in the field of hydrogeology for decades has played a huge role in promoting it's development.However,with the continuous development of the discipline,it has been found that the pute using of numerical simulation model to detect the optimal management scheme of groundwater system can only be repeated operations that is a variety of design schemes attempting to achieve a certain purpose,but this solution can only be a better solution and it can not be the best one.However,the management model can give the optimal decision that can satisfy the various objectives and constraints of management.Therefore,the management model has a wide application prospect in the optimization management of groundwater system.Yunnan Anning Refinery is built by the PetroChina that in order to promote the development of the economy of southwest region in China and achieve the strategic target optimizing the national energy structure.This paper ascertained the quaternary loose layer of this area is thin and weak seepage control,the karst area develops two horizontal karst layers,and the western part is exposed to bare surface and the east is shallowly covered through combining the field drilling,geophysical prospecting,sampling analysis and hydrogeological test and other methods to the question of the antifouling about the dissolve gap type fracture aquifer medium that developed under the construction site of the potential pollution source plant in the refinery.The main route of pollution is that pollutants pollute karst water through the thin loose layer into the lower karst aquifers.It is found that the heterogeneous characteristics of the karst development are obvious by the tracer test,and the flow state computed by seepage velocity measured by the experiment is the laminar flow state,which is suitable for Darcy's law.A numerical simulation model of three-dimensional groundwater flow and simulation of migration of pollutants were established,and the problem of three ?dimensional permeability coefficient was solved by osmotic tensor.A numerical simulation model of three-dimensional groundwater flow and simulation of migration of pollutants were established,and the problem of three-dimensional permeability coefficient was solved by osmotic tensor.And set up the pollution prevention and control wells through the analysis of its pollution way and runoff direction of the groundwater and at the same time,under the premise of ensuring the effective interception funnel,with the principle of saving the cost,set up objective function by the total pumping capacity is the minimum and to meet the hydraulic conditions without causing adverse environmental problems as constraints,and use embedded method to establish groundwater pollution prevention and control management model.And find the optimal solution that can provide scientific basis for the management of the refinery to prevention groundwater pollution,and also provide some reference for groundwater pollution prevention and control of the similar karst areas.