THE HYDRAULIC CHARACTERISTICS AND GEOCHEMISTRY OF HYPORHEIC AND PARAFLUVIAL ZONES IN ARCTIC TUNDRA STREAMS, NORTH SLOPE, ALASKA
Sodium bromide and Rhodamine WT were used as conservative tracers to examine the hydrologic characteristics of seven tundra streams in Arctic Alaska, during the summers of 1994-1996. Continuous tracer additions were conducted in seven rivers ranging from 1st to 5th order with samples collected from...
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ftepa:oai:epaEIMS:66450 2023-05-15T14:44:35+02:00 THE HYDRAULIC CHARACTERISTICS AND GEOCHEMISTRY OF HYPORHEIC AND PARAFLUVIAL ZONES IN ARCTIC TUNDRA STREAMS, NORTH SLOPE, ALASKA K Edwardson W Bowden C Duham J Morrice 2005-12-22T16:51:48Z http://oaspub.epa.gov/eims/eimsapi.dispdetail?deid=66450 unknown NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LABORATORY Text 2005 ftepa 2007-11-21T14:01:35Z Sodium bromide and Rhodamine WT were used as conservative tracers to examine the hydrologic characteristics of seven tundra streams in Arctic Alaska, during the summers of 1994-1996. Continuous tracer additions were conducted in seven rivers ranging from 1st to 5th order with samples collected from instream, hyporheic, and parafluvial locations. - - - The hyporeic zone of all four reaches was a source of nitrate, carbon dioxide, and ammonium to the channel water based on the average concentration of upwelling waters. Increased contact time with hyporheic and parafluvial zones was related to decreased temperature and increased conductivity. Net nitrogen flux from the hyporheic zone was equivalent to 14-162% of benthic N uptake requirements for the Kuparuk River. These observations are important because we expected that the presence of continuous permafrost in this Arctic environment would limit the importance of hyporheic processes, either physically or biogeochemically. Instead, we found that biogeochemical process in the hyporheic zone of these Arctic streams are at least as important as it is in similar temperate stream ecosystems. Text Arctic north slope permafrost Tundra Alaska Environmental Protection Agency (EPA): Science Inventory Arctic |
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Open Polar |
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Environmental Protection Agency (EPA): Science Inventory |
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ftepa |
language |
unknown |
description |
Sodium bromide and Rhodamine WT were used as conservative tracers to examine the hydrologic characteristics of seven tundra streams in Arctic Alaska, during the summers of 1994-1996. Continuous tracer additions were conducted in seven rivers ranging from 1st to 5th order with samples collected from instream, hyporheic, and parafluvial locations. - - - The hyporeic zone of all four reaches was a source of nitrate, carbon dioxide, and ammonium to the channel water based on the average concentration of upwelling waters. Increased contact time with hyporheic and parafluvial zones was related to decreased temperature and increased conductivity. Net nitrogen flux from the hyporheic zone was equivalent to 14-162% of benthic N uptake requirements for the Kuparuk River. These observations are important because we expected that the presence of continuous permafrost in this Arctic environment would limit the importance of hyporheic processes, either physically or biogeochemically. Instead, we found that biogeochemical process in the hyporheic zone of these Arctic streams are at least as important as it is in similar temperate stream ecosystems. |
format |
Text |
author |
K Edwardson W Bowden C Duham J Morrice |
spellingShingle |
K Edwardson W Bowden C Duham J Morrice THE HYDRAULIC CHARACTERISTICS AND GEOCHEMISTRY OF HYPORHEIC AND PARAFLUVIAL ZONES IN ARCTIC TUNDRA STREAMS, NORTH SLOPE, ALASKA |
author_facet |
K Edwardson W Bowden C Duham J Morrice |
author_sort |
K Edwardson |
title |
THE HYDRAULIC CHARACTERISTICS AND GEOCHEMISTRY OF HYPORHEIC AND PARAFLUVIAL ZONES IN ARCTIC TUNDRA STREAMS, NORTH SLOPE, ALASKA |
title_short |
THE HYDRAULIC CHARACTERISTICS AND GEOCHEMISTRY OF HYPORHEIC AND PARAFLUVIAL ZONES IN ARCTIC TUNDRA STREAMS, NORTH SLOPE, ALASKA |
title_full |
THE HYDRAULIC CHARACTERISTICS AND GEOCHEMISTRY OF HYPORHEIC AND PARAFLUVIAL ZONES IN ARCTIC TUNDRA STREAMS, NORTH SLOPE, ALASKA |
title_fullStr |
THE HYDRAULIC CHARACTERISTICS AND GEOCHEMISTRY OF HYPORHEIC AND PARAFLUVIAL ZONES IN ARCTIC TUNDRA STREAMS, NORTH SLOPE, ALASKA |
title_full_unstemmed |
THE HYDRAULIC CHARACTERISTICS AND GEOCHEMISTRY OF HYPORHEIC AND PARAFLUVIAL ZONES IN ARCTIC TUNDRA STREAMS, NORTH SLOPE, ALASKA |
title_sort |
hydraulic characteristics and geochemistry of hyporheic and parafluvial zones in arctic tundra streams, north slope, alaska |
publishDate |
2005 |
url |
http://oaspub.epa.gov/eims/eimsapi.dispdetail?deid=66450 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic north slope permafrost Tundra Alaska |
genre_facet |
Arctic north slope permafrost Tundra Alaska |
op_source |
NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LABORATORY |
_version_ |
1766316073161850880 |