Data_Sheet_1_Groundwater–Stream Connectivity Mediates Metal(loid) Geochemistry in the Hyporheic Zone of Streams Impacted by Historic Mining and Acid Rock Drainage.pdf

High concentrations of trace metal(loid)s exported from abandoned mine wastes and acid rock drainage pose a risk to the health of aquatic ecosystems. To determine if and when the hyporheic zone mediates metal(loid) export, we investigated the relationship between streamflow, groundwater–stream connectivity, and subsurface metal(loid) concentrations in two ~1-km stream reaches within the Bonita Peak Mining District, a US Environmental Protection Agency Superfund site located near Silverton, Colorado, USA. The hyporheic zones of reaches in two streams—Mineral Creek and Cement Creek—were characterized using a combination of salt-tracer injection tests, transient-storage modeling, and geochemical sampling of the shallow streambed (

废弃矿山废物和酸性岩石排水所排放的痕量金属（类金属）高浓度对水生生态系统的健康构成威胁。为确定潜流区是否以及在何种情况下介导金属（类金属）的排放，我们在美国环境保护署超级基金场地之一的科罗拉多州斯银顿附近博尼塔峰采矿区内，对约1公里长的两条溪流河段——矿物溪和水泥溪的潜流区进行了研究。通过盐示踪剂注入试验、瞬态存储建模以及浅层河床的地球化学采样等方法，对这两条溪流的潜流区进行了特征描述。