Cooper bore hydrochemical cluster groups

\n## **Abstract** \nThe dataset was derived by the Geological and Bioregional Assessment Program from the hydrochemistry analysis of bores and springs for aquifers within the GAB dataset. The processes undertaken to produce this derived dataset are described in the History field in this metadata statement.\n\n\n## **Attribution** \nGeological and Bioregional Assessment Program\n\n\n## **History** \nSelection of samples with values > 0 for all variables: electrical conductivity (EC), pH, Ca, Na, Mg, K, Cl, SO4, HCO3. Normalisation (log-transformation) of all variables, expect pH. Identification of outliers via nearest neighbour linkage and exclusion of samples with dissimilar or unusual chemistry. Attribution of sample to six clusters using Ward’s linkage rule, based on analysis of variance.## **摘要** 本数据集由地质与生物区域评估计划（Geological and Bioregional Assessment Program）基于大自流盆地（Great Artesian Basin, GAB）含水层的钻孔与泉水水化学分析结果衍生而来。本衍生数据集的生成流程详见本元数据声明中的「历史」字段。 ## **署名** 地质与生物区域评估计划 ## **历史** 筛选所有变量（电导率(Electrical Conductivity, EC)、pH值、钙(Calcium, Ca)、钠(Sodium, Na)、镁(Magnesium, Mg)、钾(Potassium, K)、氯(Chlorine, Cl)、硫酸盐(Sulfate, SO4)、碳酸氢根(Bicarbonate, HCO3)）取值均大于0的样本；对除pH值外的所有变量实施对数变换标准化处理；通过最近邻链接法识别异常值并剔除化学组成差异显著或属性异常的样本；基于方差分析结果，采用沃德链接法则（Ward's Linkage Rule）将样本划分为6个聚类簇。