Study On The Pollutant Transport Numerical Simulation And Polluted Area Dibision Of The Haidai Industrial Park And Swimming Burma Two Sewage Treatment Plant

As a high quality water supply source, groundwater provided for nearly 70% of the drinking water and 40% of the irrigation water in China. However, in recent decades, with the accelerating process of industrialization and urbanization, the groundwater pollution tend to rising. the correct analysis of groundwater pollutant migration situation and study of the influence factors of contaminant migration is one of the necessary premise of effective prevention of groundwater pollution. Therefore, based on the GMS software, the groundwater flow field and pollutant migration in Haidai river industrial park and swimming Burma two sewage treatment plants were simulated. It has a certain engineering significance and theoretical value.Based on the Haidai Industrial Park and Swimming Burma two river sewage treatment plant. The data of the calendar year within the study area of groundwater water quality, hydrological geological were comprehensive analysised. Groundwater flow numerical model were established, to analyzes influence of the groundwater flow field years changing law and land surface evaporation intensity and permeability on the groundwater flow field. The two kinds of pollution factors of chemical oxygen demand and ammonia nitrogen, under accident conditions of pollutants migration conditions were simulated. Under accident conditions of pollutants migration conditions were simulated, and the influence of supply rate on ammonia nitrogen migration of haidai industrial park sewage treatment plant and the influence of chemical oxygen demand migration on swimming in brunei river sewage treatment were simulated. The main results were as follows.(1) In the simulation of the underground water flow field, the numerical simulation results were in conformity with the actual monitoring data, the established numerical model for groundwater flow field calculation results meet the precision requirement.It can be used in groundwater solute transport modeling.(2) with the increase of permeability coefficient, the groundwater head increased, while the groundwater flow field on the is not sensitive to the changes of permeability coefficient.(3) With the increase of land surface evaporation intensity, the groundwater head decreased obviously. The groundwater flow field is sensitive to changes of land surface evaporation.(4) In the early period of the accident, each pollution factor pollution concentration were very high, over time, the maximum pollution factor pollution concentration reduced rapidly. And the chemical oxygen demand in the groundwater pollution concentration is greater than the largest ammonia nitrogen.(5) When the local water supply rate were small, pollutant diffusion is slow, underground pollutant concentration is high. And when the groundwater recharge rate is bigger, the pollutant diffusion is faster, the pollution range larger.(6) With the increase of horizontal longitudinal dispersion coefficient, the pollution of the lateral radius increase, and the lateral pollution range is wider.