Record Display for the EPA National Library Catalog
RECORD NUMBER: 230 OF 289
|OLS Field Name||OLS Field Data|
|Main Title||Sources of Metal Loads to the Alamosa River and Estimation of Seasonal and Annual Metal Loads for the Alamosa River Basin, Colorado, 1995-97.|
|Author||Ortiz, R. ; Edelmann, P. ; Ferguson, S. ; Stogner, R. ;|
|CORP Author||Geological Survey, Denver, CO. Water Resources Div.|
|Additional Subjects||Tracer techniques ; Water sampling ; Metals ; Data collection ; Data analysis ; Contamination ; Metal loads ; Alamosa River Basin ; Water chemistry ; Mine wastes ; Quantitative analysis ; Loading ; Colorado ; Exposure ; Source areas ; Seasonal estimates ; Wightman Fork(Colorado)|
Metal contamination in the upper Alamosa River Basin has occurred for decades from the Summitville Mine site, from other smaller mines, and from natural, metal-enriched acidic drainage in the basin. In 1995, the need to quantify contamination from various source areas in the basin and to quantify the spatial, seasonal, and annual metal loads in the basin was identified. Data collection occurred from 1995 through 1997 at numerous sites to address data gaps. Metal loads were calculated and the percentages of metal load contributions from tributaries to three risk exposure areas were determined. Additionally, a modified time-interval method was used to estimate seasonal and annual metal loads in the Alamosa River and Wightman Fork.