运城解州地区地下水水质恶化形成原因及防治

FORMATION CAUSES AND CONTROLLING MEASURES OF GROUNDWATER-QUALITY DETERIORATION IN XIEZHOU AREA, YUNCHENG CITY

运城解州地区近年来出现地下水水质明显恶化的现象 ,直接影响了当地居民正常生活和农业灌溉用水 .通过对该区水文地质条件的调查和水质分析对比 ,认为是洪积倾斜平原中上部大量开采地下水使地下水水位下降 ,水力坡度变缓 ,在这种条件下 ,又在咸淡水过渡带附近抽取地下水使地下水位低于硝池水位 ,引起咸水入侵 ,造成地下水水质恶化 .研究认为必须控制开采量和抽水地段才能防止地下水水质进一步恶化和扩展 .

The groundwater quality in Xiezhou area of Yuncheng city has conspicuously deteriorated in recent years, directly affecting the water supply for the local people daily life and for the agricultural irrigation. The comparison of the hydrogeological condition with the water quality test results in the study area shows that the mass extraction of the groundwater in the mid upper section on fluvial filt plane has lowered the groundwater table and eased the hydraulic gradient. In this case, the extraction of the groundwater near the transitional zone of brackish water has resulted in the lower groundwater table than the niter poor water table, and further in the intrusion of the salt water and further deterioration of the groundwater quality. In order to prevent the further deterioration of groundwater quality and the expansion of the polluted groundwater, the amount of the extracted groundwater and the pumping sections should be controlled.