| Abstract: | A computer model has been developed for spatial and temporal simulation of streamflow and dissolved solids in the Tongue River from the Tongue River Dam to Miles City, Montana. User-defined plans of surface coal mining and agricultural development permit evaluation of potential changes in dissolved solids resulting from leaching of overburden material used to backfill mine pits and from withdrawal and return flow of irrigation water. Provision is made for simulation runs using increased streamflow from a proposed larger reservoir intended to replace the present Tongue River Reservoir. Simulations at mean streamflow indicated that mining 119,600 acres of federally leased coal tracts may increase by 4.8 percent the present annual dissolved-solids concentration in the Tongue River at Miles City. Simulations using the proposed Tongue River reservoir show substantial reductions in dissolved-solids concentration when paired with similar simulations using the present Tongue River Reservoir. When compared on a per-acre basis for the study area, the dewatering caused by irrigation increases dissolved-solids concentration more than the input of leachates from surface coal-mining operations. (USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 30583 |
| Citation Author: | Woods, Paul F. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | v, 73 p. :ill., maps ;28 cm. |
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| Citation Publisher: | U.S. Geological Survey, Water Resources Division, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 81-64 |
| Citation Search Results Text: | Modeled impacts of surface coal mining on dissolved solids in the Tongue River, southeastern Montana; 1981; WRI; 81-64; Woods, Paul F. |
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| Citation Year: | 1981 |
| Type: | citation/reference |
| Text: | Modeled impacts of surface coal mining on dissolved solids in the Tongue River, southeastern Montana; 1981; WRI; 81-64; Woods, Paul F. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, Water Resources Division, |
