辽阳市城区地下水污染时空演化研究

Temporal and Spatial Evolution of Groundwater Pollution in Urban Area of Liaoyang City

城市化发展对地下水溶质成分的变化会产生重要影响,导致地下水溶质的稀释和运移能力大大降低,也会导致地下水中增加新的溶质。文章采用投影寻踪地下水污染指数模型,对辽阳市城区地下水监测井的历史监测数据进行分析,采用修正的局部多项式插值法,对当地历史水源污染指数进行插值分析,最终得到该研究区的地下水污染时空演化图。研究结果表明,辽阳市城区地下水污染指数较高,当地水污染在区域分布上呈现出轻—重—轻的阶段性演变特征,由此证实了辽阳市城区地下水污染情况与人类社会生产实践活动密切相关。

Urban development of groundwater and solute change will not only pose a threat to groundwater circulation system of the original,but also change the original landform in the region,especially in the process of the city,due to a large number of human production and life practice.Therefore,the dilution and migration ability of groundwater solute is greatly reduced.In this process,the development of urbanization will increase new solutes to underground water.Based on this,this paper will use the index of groundwater pollution projection pursuit model,and the historical data of Liaoyang city from 1980 to 2105 groundwater monitoring wells were analyzed.In the process of analysis,the groundwater pollution in the study area is characterized by non continuity.Therefore,this paper uses the modified local polynomial interpolation method to analyze the local historical water pollution index,and finally get the spatial and temporal evolution of groundwater pollution in the study area.The results further show that the groundwater in Liaoyang city has been polluted by different degrees.Therefore,the water pollution index is higher,in addition,by means of groundwater pollution situation evolution analysis,found that the local water pollution distribution in the region showing the evolution characteristics of stage light heavy light,which confirmed the Liaoyang city groundwater pollution and human social practice activities are closely related.