| Abstract: | In the Snake River the concentration of dissolved iron is apparently unrelated to seasonal changes in hydrologic regime unlike most other dissolved constituents. Hourly sampling indicated short-term fluctuations in iron chemistry, whereas the concentrations of most other dissolved constituents, including other trace metals, remain stable. During the day, greater concentrations of dissolved total and ferrous iron generally occurred during periods of full sunlight. Photoreduction of hydrous iron oxides, which are abundant in the fine sediment and as coatings on the rocks, may be responsible for these observations. Iron chemistry also varied at night, decreasing in dissolved total and ferrous iron until about midnight and increasing until dawn. Oxidation of ferrous iron, and several microbial processes, may contribute to these nightime changes. -from Authors |
| Genre: | Article |
| ProdID: | 70014391 |
| Citation Author: | McKnight, D.; Bencala, K. E. |
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| Citation End Page: | 500 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Arctic & Alpine Research |
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| Citation Number Of Pages: | 9 |
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| Citation Search Results Text: | Diel variations in iron chemistry in an acidic stream in the Colorado Rocky Mountains, USA; 1988; Article; Journal; Arctic & Alpine Research; McKnight, D.; Bencala, K. E. |
| Citation Start Page: | 492 |
| Citation Volume: | 20 |
| Citation Year: | 1988 |
| Type: | citation/reference |
| Text: | Diel variations in iron chemistry in an acidic stream in the Colorado Rocky Mountains, USA; 1988; Article; Journal; Arctic & Alpine Research; McKnight, D.; Bencala, K. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1988 00:00 -0600 |
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