基岩裂隙水水化学特征的聚类分析——以乌蒙山重点地区为例

Cluster Analysis of Chemical Characteristics of Bedrock Fissure Water——Taking the Wu Mengshan Key Areas for Example

通过对乌蒙山重点地区大量控制性水样测试结果进行分析,采用Piper三线图示法和Q型系统聚类分析法,探讨了该地区基岩裂隙水的水化学成分特征及其分布规律,结果表明:(1)p H值空间变异性较小,其值相对稳定;Na^+、Cl^-、HCO^-_3显示出中等变异性;TDS、K^+、Mg^(2+)、Ca^(2+)、SO^(2-)_4变异系数大,含量存在着较大的空间变异性。(2)聚类分析对水化学特征进行快速、有效的分类,较好地揭示了地下水空间分布特征及其与地形地貌的关系,分析结果直观且效率高,能够精确区分Ⅳ类水及其水化学成分特征、分布规律。

Based on the massive groundwater sample test results in Wu Mengshan key areas,using Piper trilinear diagram and Q type hierarchical cluster analysis,this paper discussed the hydrochemical composition characteristics and distribution rules of bedrock fissure water. The result showed that,（ 1） spatial variability of The p H value is small,and is relatively stable. Na^＋、Cl^-、HCO ^-3 showed moderate variability. Spatial variability of TDS、K^＋、Mg^（2＋）、Ca^（2＋）and SO^（2-）4 were large,so their content have large spatial variability.（ 2） Cluster analysis rapidly and effectively classified the hydrochemical characteristics,revealed the groundwater spatial distribution characteristics and the relationship with the topography,analysis result is intuitive and efficient,can accurately distinguish water quality classⅣ and the hydrochemical characteristics of its ingredient and its distribution rules.