Denitrification in sediments from the hyporheic zone adjacent to a small forested stream
Canadian Journal of Fisheries and Aquatic Sciences
By: J.H. Duff and F.J. Triska
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Abstract
Denitrifying potentials increased with increasing distance from the stream channel. Dissolved oxygen was 100% of the concentration expected in equilibrium with the atmosphere in water obtained from monitoring wells immediately adjacent to the stream but was as low as 7% of the expected value in water 11.4 m inland. Both nitrate and dissolved organic carbon decreased over summer in wells at the base of the alder-forested slope. A 48-h injection of nitrate-amended stream water into hyporheic water 8.4 m inland stimulated nitrous oxide production in the presence of acetylene. Nitrous oxide was generated as nitrate and acetylene were co-transported to a well 13 m down-gradient. Acetylene-block experiments coupled with the chemistry data suggest that denitrification can modify the chemistry of water during passage through the hyporheic zone. -from Authors
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Denitrification in sediments from the hyporheic zone adjacent to a small forested stream |
| Series title | Canadian Journal of Fisheries and Aquatic Sciences |
| DOI | 10.1139/f90-133 |
| Volume | 47 |
| Issue | 6 |
| Year Published | 1990 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Canadian Journal of Fisheries and Aquatic Sciences |
| First page | 1140 |
| Last page | 1147 |
| Google Analytic Metrics | Metrics page |