Quantification of mine-drainage inflows to Little Cottonwood Creek, Utah, using a tracer-injection and synoptic-sampling study
Quantification of mine-drainage inflows to Little Cottonwood Creek, Utah, using a tracer-injection and synoptic-sampling study
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使用示踪剂注入和天气采样研究对犹他州 Little Cottonwood Creek 的矿井排水流入量进行量化
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
L. Gerner
中科院分区：
文献类型：
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作者：
B. Kimball;R. Runkel;L. Gerner
摘要：犹他州小棉白杨峡谷的历史性采矿留下了许多矿井排水隧道，这些隧道将水排放到小棉白杨溪。为了量化矿井排水到河流的主要来源，在低流量条件下（1998年9月）进行示踪剂注入期间进行了天气取样。有明显的增加，从矿山排水和主要支流流入，代表总的表面和地下的贡献下游排放。从天气取样确定的溪流水的化学成分受碳酸盐岩风化和矿井排水流入的控制。碳酸盐岩的缓冲在整个研究范围内保持了较高的pH值。大部分的金属负载是从四个地表水流入和三个地下流入。主要地下流入来自Wasatch隧道的矿池。所有金属的自然衰减导致形成胶体固体，吸附的一些金属，并积累到河床上。河床上的沉积物可能对水生生物造成慢性毒性。这项研究的信息将有助于做出有关环境恢复的决定。
Abstract.Historic mining in Little Cottonwood Canyon in Utah has left behind many mine drainage tunnels that discharge water to Little Cottonwood Creek. To quantify the major sources of mine drainage to the stream, synoptic sampling was conducted during a tracer injection under low flow conditions (September 1998). There were distinct increases in discharge downstream from mine drainage and major tributary inflows that represented the total surface and subsurface contributions. The chemistry of stream water determined from synoptic sampling was controlled by the weathering of carbonate rocks and mine drainage inflows. Buffering by carbonate rocks maintained a high pH throughout the study reach. Most of the metal loading was from four surface-water inflows and three subsurface inflows. The main subsurface inflow was from a mine pool in the Wasatch Tunnel. Natural attenuation of all the metals resulted in the formation of colloidal solids, sorption of some metals, and accumulation onto the streambed. The deposition on the streambed could contribute to chronic toxicity for aquatic organisms. Information from the study will help to make decisions about environmental restoration.