| The industrial gathering area of Laoting county is located in the northeast of Hebei and the southeast of Tangshan.Based on finding out the change of the groundwater system for the next ten years,the local businesses and government management department can formulate environmental scheme for protection.Based on the hydrogeological data in the study area,the groundwater quality and water level data were measured through field investigation.The hydrogeological investigation was supplemented.The hydrogeological conditions in the study area were modeled and generalized by using visual MODFLOW software.Visual MODFLOW software established the mathematical model of groundwater flow and soluted transport model for the typical sewage treatment station of pollution enterprise as the leakage point of pollution source at the abnormal conditions.The researcher selected COD as the prediction factor.The prediction result showed that the range of COD in the simulation increased.Then it decreased gradually until disappear.In the simulation,the maximum distance was 369.6m.The maximum range covered 16795.7m~2.It didn't affect the surrounding sensitive points.There was no excess range in the simulation.The results showed that for the abnormal situation,the pollutant only affected the groundwater environment in the local area where the sewage leakage occured,and didn't have a significant impact in the area outside the factory.This prediction was the result of considering the most unfavorable situation.In fact,because of the protection of aeration zone,the impact of pollutant in the groundwater environment will be much smaller,and will not have a greater impact in the groundwater environment for the surrounding area.This paper analyzed the trend of the change of the groundwater in the next ten years from the qualitative and quantitative points,and provided guidance for the groundwater protection in the industrial gathering area of Laoting county. |
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