基于聚类分析岛礁地下水水质分类方法

Classification Method of Water Quality of Freshwater Lens in Coral Reefs and Islands

地下淡水体是珊瑚岛礁的重要淡水资源,但是长久以来学者们对于岛礁地下淡水体水质分类并没有太多研究,一般就是以氯离子浓度600mg/L为分类界限,而且由于岛礁地下淡水体的特殊性,常用的地下水质量标准以及海水水质标准并不能给我们提供足够的参考。随着项目的发展,以单一的氯离子浓度分类已经无法满足我们对水质的调查以及评价。采取聚类算法对目标值进行分类,它是通过计算各个数据点到聚类中心的距离来判别每个水样的类别。结果表明,结合电导率、氧化还原电位以及浊度的分类结果是比较满意的,并且为现阶段的水质调查评估提供了分类参考。

The freshwater lens below the coral reefs and island is a very important fresh water source,however,not many researches on this aspect are reported.The conventional classification borderline for the saline water is using the 600 mg/L chloride concentration.Due to the uniqueness of the freshwater lens underneath the coral reefs and islands,the conventional groundwater quality and seawater quality standards could not provide enough references for the theoretical study and practical applications.It is recognized that the single chloride concentration classification is unable to meet the investigation and evaluation of water quality for these freshwater lenses.This paper presents a new classification by clustering algorithm,which classifies each water sample by calculating the distance from each data point to the cluster center.The results show that the classification results using SpCond,ORP and Turbidity are satisfactory.