Denitrification in sediments from the hyporheic zone adjacent to a small forested stream
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
Citation Information
Publication Year | 1990 |
---|---|
Title | Denitrification in sediments from the hyporheic zone adjacent to a small forested stream |
DOI | 10.1139/f90-133 |
Authors | J.H. Duff, F.J. Triska |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Canadian Journal of Fisheries and Aquatic Sciences |
Index ID | 70015905 |
Record Source | USGS Publications Warehouse |