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| | USGS CIRC 1160 subpage: DO ANTHROPOGENIC ACTIVITIES ADVERSELY AFFECT WATER QUALITY IN THE UPPER SNAKE RIVER BASIN? |
 | | Water quality in the upper Snake River Basin is degraded by numerous anthropogenic activities, including both nonpoint and point sources of pollutants. |
 | | In contrast, agricultural activities, urban communities, and industries concentrated on the Snake River Plain, primarily along the Snake River and near the mouths of major tributary valleys, contribute sediment, fertilizers, organic compounds, and other pollutants to the Snake River and its tributaries [3,4]. |
 | | In 1990, 71 percent of all irrigated acreage in Idaho was in the upper Snake River Basin, where potatoes, beans, wheat, sugar beets, alfalfa, and barley are the predominant crops [2]. |
| pubs.usgs.gov /circ/1998/circ1160/nawqa91.4.html (1319 words) |
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