Study On The Risk Of Groundwater Pollution In Yuncheng Basin,Shanxi Province

In recent years,with the increase of the urbanization level in the Yuncheng basin in Shanxi,under the influence of more and more intense human activities,the groundwater pollution in the basin has become more and more serious,causing huge impact on people's drinking water levels and regional water environment.Threats.In view of this,it is necessary to investigate and study the groundwater pollution in the Yuncheng Basin,Shanxi Province,including its groundwater quality,pollution risk,and provide scientific basis for the rational development and protection of water resources.This paper aims at the problem of groundwater pollution caused by human activities such as industrial and agricultural production and energy development in the Yuncheng basin in Shanxi Province in recent years.It carried out five researches on the basin and obtained the following conclusions.?1?The shallow and medium-deep groundwater quality zones in the study area are distributed regularly on different geomorphologic units.The transition from the piedmont piedmont area to the alluvial low-order area in the basin,the groundwater quality gradually deteriorates.The poor quality or poor quality is mainly due to the distribution of the over-scale points related to the direction of the groundwater fill-in and row-out in the Yuncheng Basin,the depth of the groundwater level,and human engineering activities.?2?Analysis results of on-site testing indicators and inorganic routine chemical indicators showed that there was no Class I water in the deep groundwater in the study area,with Class II water accounting for 4.88%,Class III water accounting for39.02%,and Class IV water accounting for 46.34%(exceeding The indicators are nitrate,iron,aluminum,total dissolved solids,sulfate and chromium(Cr⁶⁺),and the proportion of water in category V is 9.76%?Exceeding indicators are sulfate,total dissolved solid chromium,total hardness,aluminum,and chloride?.The analysis of inorganic toxicological indicators and trace organic indicators on the analysis of medium-deep groundwater pollution showed that the proportion of uncontaminated water in the deep groundwater in the study area accounted for 92.68%,mild pollution accounted for 7.32%,and there was no moderate,severe and extremely severe polluted water.?3?According to DRASTIC model evaluation method,groundwater antifouling performance in the study area is divided into areas with good antifouling performance,better antifouling performance,medium antifouling performance,and poor antifouling performance.No antifouling performance Very poor area;its area is290.74km²,496.42km²,1186.71km²,702.87km² and 0 respectively.?4?Based on the results of the survey and the relevant data collected in the basin area,the risk of groundwater contamination in the basin area was divided into four areas,namely,high risk areas,high risk areas,moderate risk areas,and risks.Low-risk areas,low-risk areas;corresponding areas were 32.01km²,746.84km²,1943.72km² and 483.34km²,respectively.?5?The study was divided into pollution control area,prevention and control area and general protection area,and the corresponding areas were 619.69 km²,196.68km² and 4130.63 km².