The Occurrence and Distribution of Selected Trace Elements in the Upper Rio Grande and Tributaries in Colorado and Northern New Mexico

作者: H. E. Taylor , R. C. Antweiler , D. A. Roth , T. I. Brinton , D. B. Peart

DOI: 10.1007/S002440010267

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摘要: Two sampling trips were undertaken in 1994 to determine the distribution of trace elements Upper Rio Grande and several its tributaries. Water discharges decreased main stem from June September, whereas dissolved concentrations generally increased. This is attributed dilution base flow snowmelt runoff samples. Of three major mining districts (Creede, Summitville, Red River) drainage basin, only Creede District appears impact a significant manner, with both waters sediments having elevated some considerably downriver. For example, zinc upriver Willow Creek, which primarily drains District, about 2–3 μg/L; immediately downstream Creek confluence, above 20 occurred for next 100 km. The River does not significantly most elements. Because current water management practices, it difficult assess Summitville on Grande. There are, however, large increases many element as passes through San Luis Valley, coincident those same Among these are As, B, Cr, Li, Mn, Mo, Ni, Sr, U, V. None exceeded U.S. EPA primary drinking standards either survey, exception cadmium Creek. Secondary frequently violated, especially tributaries draining areas where has occurred. Dissolved (in September) was that Quality Criteria aquatic life 120 μg/L.

参考文章(19)
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