基于模糊聚类分析的莱州湾南岸地下水化学分布特征研究  

Study on the groundwater hydrochemistry distribution features in the southern Laizhou Bay based on the fuzzy cluster analysis

作　　者：毕延凤[1,2,3] 于洪军[2] 徐兴永[2] 苏乔[2] 

机构地区：[1]中国科学院烟台海岸带研究所,山东烟台264003 [2]国家海洋局第一海洋研究所,山东青岛266061 [3]中国科学院研究生院,北京100039

出　　处：《海洋通报》2012年第4期361-368,共8页Marine Science Bulletin

基　　金：科技支撑计划(2010BAC68B01);海洋公益性行业科研专项(201105020);国家重点基础研究发展计划(2010CB951200);基本科研业务费专项资金项目(2011G19)

摘　　要：针对莱州湾南岸咸水入侵区地下水质连续、渐变和边界模糊的特征,利用规格化变换对莱州湾南岸地下水化学组分数据进行标准化,采用夹角余弦法作为相似系数,用平方法计算传递闭包构造模糊等价矩阵进行模糊聚类分析,将莱州湾南岸地下水划分为3类并绘制其平面分区图。在此基础上,用探索性数据分析技术的箱线图分别识别各类地下水各组分的分位数、中位数、极值等数据分布情况,并结合Radial图绘制各类地下水各组分均值;利用基于CA舒卡列夫分类方法的Piper三线图识别了各类地下水的水化学类型;最后在相关分析基础上选取代表性指标绘制等值线图,结合模糊聚类分区探讨了分区各指标的空间结构特征及内在机理。综合上述分析,定义Ⅰ区为海水入侵重点治理区,Ⅱ区为海水入侵综合防范与整治区,Ⅲ区为卤水区。Groundwater quality in saltwater intrusion zone is featured as the continuous and gradual and has fuzzy boundary in the southern Laizhou Bay. Based on the groundwater sampling and chemical components test, fuzzy cluster analysis was conducted by adopting a series of steps including standardized transformation, with angle cosine and transitive closure calculated by square method to divide groundwater into three classes. On this basis, box chart was applied to identify the distribution of percentile, median, extreme values and outliers of groundwater components data in each class. Mean value of components was drawn for each class by radial diagram, and chemical types of groundwater were spotted by Piper diagram. Representative indices were selected on the basis of correlation analysis to draw contour map. The spatial structure of each index and the internal mechanism were discussed by analyzing both the contour map and zoning map based on fuzzy cluster analysis. To sum up, Region Ⅰ was defined as key treatment area of seawater intrusion, and Region Ⅱas comprehensive prevention and remediation area and Region Ⅲ as brine area.

关 键 词：莱州湾南岸 模糊聚类分析 箱线图 Radial图 Piper三线图 等值线图 

分 类 号：P641[天文地球—地质矿产勘探] X523[天文地球—地质学]