改进的物元分析法在浅层地下水综合评价中的应用

Application of improved matter analysis method in shallow groundwater comprehensive evaluation

以浅层地下水作为研究对象,发现在评价过程中利用经典物元分析法计算综合关联度函数存在缺陷,改进物元分析法后对福建省晋江市浅层地下水进行综合评价并以地图表达其空间分布.结果表明,境内大部分区域处于地下水分级标准的Ⅰ,Ⅱ级水平,说明浅层地下水质量总体良好;而处于Ⅳ,Ⅴ级水平者(水质较差和极差)主要分布于境内的东石镇、陈埭镇、紫帽镇、深沪镇部分区域;影响浅层地下水质量的超标因子主要为TDS,Mn2+,NO-3,NO-2,NH+4,Cl-.分析表明沿海海水入侵、原生地质条件、工业农业排放和人类生活是造成该区浅层地下水质变差的主要原因.

Take shallow groundwater as an objects,the study found that there are defects in calculation of correlation function when using the classical matter element analysis method in the evaluation process.An improved integrated evaluation of shallow groundwater is put forward and is used to make comprehensive evaluation in Jinjiang City,Fujian Province,and the spatial distribution is expressed by maps.Evaluation results showed that most of the groundwater classification standard belong to levelⅠandⅡ,the level of shallow groundwater environmental quality overall is good.Groundwater classification standard leve Ⅳand Ⅴ（water quality is poor and very poor）are mainly located in the coastal zone in the territory of the Dongshi town,Chendai town,Zimao town,Shenhu town,and the area are smaller,it’s about 3.4%. The major exceed factor are TDS,Mn2 ＋ ,NO-3 ,NO-2 ,NH ＋4 ,Cl- .The seawater intrusion in coastal areas, the primary geological conditions,the discharges of industrial agriculture and human life are the main reasons resulting in poor quality of shallow groundwater in the area.