基于空间分析荞麦地流域地下水健康风险评价

以云南荞麦地流域为研究区域，对该区域2017年24个地下水样品中5种重金属指标（Cr、Pb、Co、Mn、Hg）和1种无机毒理指标（氟化物）进行测定和分析，并基于半方差模型等地学统计方法，对地下水健康风险评价进行空间分析.结果表明：地下水通过饮水途径所引起的成人和儿童的健康风险分别为9.27×10^-10~4.59×10^-5a^-1和1.10×10^-8~5.46×10^-4a^-1.地下水健康风险评价值以Cr为主导，成人与儿童存在较高的一致性.地下水健康风险存在很强的空间规律性，在南北方向上呈条带状分布.受位于中游的药山镇影响，研究区南部下游地区地下水健康风险显著增加.

Groundwater health risk assessment based on spatial analysis in the Qiaomaidi watershed

Concentration of five metals, Cr, Pb, Co, Mn, Hg and one inorganic toxicological index, fluoride from twenty-four samples collected from groundwater in the Qiaomaidi watershed were measured and analyzed. Based on the semi-variance model and other geostatistical methods, the distribution characteristics of the groundwater health risk assessment were analyzed. The health risks of adults and children through drinking pathway were 9.27×10^-10~4.59×10^-5a^-1 and 1.10×10^-8~5.46×10^-4a^-1, respectively. The groundwater health risks were dominant by Cr, and were consistent for adults and children. The distribution of the health risks was spatial regularity, and presented as a strip from south to north. Influenced by the Yaoshan town located in the middle of the watershed, the health risks increased remarkably in the south which was the downstream.