Groundwater Environment Prediction Of Xiaoyi Economic Development Zone In Shanxi Province

Groundwater is the main water source supply in northern arid and semi-aridclimate zone. In recent years, as the rapid development of economy and theincrease in population, groundwater extraction increased year by year, theamount of sewage discharge was also found in an increasing trend, resulting inwater resources and environment system has been severely damaged. Due to thedeficiency of the groundwater self-purification and renewal capacity, oncegroundwater suffer pollution, it is difficult to the during long time. Xiaoyieconomic development zone is located in the alluvial plain area near urban.Loose rock pour water is the main water supply source in study area. Thedevelopment zone includes chemical industry park area and Wutong cokingindustrial park area. After the machine coke and coal chemical industry inoperation, under the situation of sudden wastewater leakage, it not only causesoil pollution as much contamination entering aeration zone, but also threatwater supply security seriously, because the contamination enters groundwatersystem through aeration zone. Therefore, the study of construction in development zone have significance effect for local water environment.Based on collecting and analysing the data of regional geological andhydrogeological condition as well as the data of water resources andenvironment and other information on the current situation in research area,set the quaternary loose pore aquifer was set as the protective target layer, ahydrogeological conceptual model was established by a comprehensiveconsideration of vadose and pore aquifer, meanwhile constructed themathematical model and numerical simulation model of groundwater flow andthe solute transportion. COD, BOD5was seleted as pollutant simulation factorsand HYDRUS-1D and VISUAL MODFLOW software were used to predictdynamic distribution and variation of pollutants in the aeration zone and theaquifer under event, and to analyse the influence on water environment in themeantime.The results showed that: after the event of waste water leakage ofQingYi in the chemical industry, BOD5penetrated into groundwater fromaeration zone after590d, and the influence area of the pollutants wererespectively15.18km2,46.39km2and81.27km2in the future of1year,5yearsand10years. COD penetrated into groundwater from aeration zone after600d,and the influence area of the pollutants were respectively13.19km2,53.1km2and90.15km2in the future of1year,5years and10years.. After the accident ofwaste water leakage of BeiYao in Wutong machine coke industry, BOD5penetrated into groundwater from aeration zone after420d, and the influencearea of the pollutants were respectively24.57km2,40.76km2and62.93km2in the future of1year,5years and10years.COD penetrated into groundwater fromaeration zone after420d, and the influence area of the pollutants wererespectively12.58km2,45.7km2and72.73km2in the future of1year,5yearsand10years.In the case of the accident, the construction of the park will havepollution influence on the groundwater environment, and the measures toprevent and control the groundwater environment must be taken. The paper tooksoil-aeration zone and groundwater as a system to simulate solute transport andevaluate pollution. The results of this study can provide the technical basis forpromoting construction of green transformation demonstration area in theXiaoyi city and the protection of local water resources.