濮阳东北部金堤河两岸地下水污染状况分析

采集濮阳东北部金堤河两岸的浅层和深层地下水样进行水化学分析,指出HCO3 Na型是该研究区地下水的主要化学类型。选择水化学类型为HCO3 Na型且远离非HCO3 Na型水样点集中区域的监测点的水质数据,计算出浅层和深层地下水的水化学组分对照值,并在此基础上进行地下水污染评价,确定浅层和深层地下水的污染现状和主要污染因子。结果表明:35个浅层地下水监测点中,26个点均受到不同程度的污染,主要污染因子是COD、NO2- N和NH3 N;5个深层地下水监测点中,仅靠近金堤河的2个点的数据显示受到微污染,污染因子是溶解性总固体、SO24-和NO2- N。研究区浅层地下水受人类活动影响较强,主要污染源为含氮的农药、化肥和被污染的地表水等。

Contamination of groundwater along banks of Jindi River in northeast Puyang

Samples of the shallow and deep groundwater along the banks of the Jindi River in northeast Puyang were collected for hydrochemical analysis.The results show that HCO3-Na is the main chemical type in groundwater in the study area.The background quality of the shallow and deep groundwater were determined based on the water quality data of the monitoring points with the groundwater chemical type of HCO3-Na,distant from the concentrated area of the monitoring points where the groundwater chemical type is not HCO3-Na.Then,the groundwater contamination was assessed,and the current situation and main factors of contamination of the shallow and deep groundwater were determined.Of 35 shallow groundwater monitoring points,26 points were polluted and the primary contamination factors included COD,NO-2-N,and NH3-N.Of five deep groundwater monitoring points,only two points near the banks of the Jindi River were slightly polluted and the primary contamination factors included total dissolved solids,SO24,and NO-2-N.The shallow groundwater in the study area was significantly affected by human activities,and the major pollution sources were nitrogen-containing pesticides,fertilizers,and contaminated surface water.