Influence of sewage inputs and fish farm effluents on dissolved nitrogen species in a chalk river
Influence of sewage inputs and fish farm effluents on dissolved nitrogen species in a chalk river
Nitrate, ammonium and dissolved organic nitrogen (DON) concentrations were measured in the lower reaches of the River Test in Hampshire to assess the impact of two effluent point sources. An 18-month survey from July 2001 to December 2002 was carried out at locations above and below fish farm inputs and a sewage effluent outfall. The concentration of nitrate exceeded 400 uM at the four sites on all sample dates. A consistent increase in ammonium concentration was measured downstream of the fish farm, but not the sewage effluent input. DON samples collected downstream of the fish farm did not show a consistent increase in concentration, compared with the upstream sampling location, whereas the sewage effluent input at Romsey was a point source of DON to the River Test with a mean increase of 15 uM. Nitrate was the major component of dissolved nitrogen in this aquifer-fed chalk-bed river system, with up to 10% being DON and ammonium comprising <1%.
ammonium, chalk bed river dissolved organic nitrogen, nitrate, total dissolved nitrogen
117-125
Homewood, J.M.
7c20106b-3163-4e9c-85b9-bfbe17d3f448
Purdie, D.A.
18820b32-185a-467a-8019-01f245191cd8
Shaw, P.J.
935dfebf-9fb6-483c-86da-a21dba8c1989
December 2004
Homewood, J.M.
7c20106b-3163-4e9c-85b9-bfbe17d3f448
Purdie, D.A.
18820b32-185a-467a-8019-01f245191cd8
Shaw, P.J.
935dfebf-9fb6-483c-86da-a21dba8c1989
Homewood, J.M., Purdie, D.A. and Shaw, P.J.
(2004)
Influence of sewage inputs and fish farm effluents on dissolved nitrogen species in a chalk river.
Water Air and Soil Pollution: Focus, 4 (6), .
(doi:10.1007/s11267-004-3021-5).
Abstract
Nitrate, ammonium and dissolved organic nitrogen (DON) concentrations were measured in the lower reaches of the River Test in Hampshire to assess the impact of two effluent point sources. An 18-month survey from July 2001 to December 2002 was carried out at locations above and below fish farm inputs and a sewage effluent outfall. The concentration of nitrate exceeded 400 uM at the four sites on all sample dates. A consistent increase in ammonium concentration was measured downstream of the fish farm, but not the sewage effluent input. DON samples collected downstream of the fish farm did not show a consistent increase in concentration, compared with the upstream sampling location, whereas the sewage effluent input at Romsey was a point source of DON to the River Test with a mean increase of 15 uM. Nitrate was the major component of dissolved nitrogen in this aquifer-fed chalk-bed river system, with up to 10% being DON and ammonium comprising <1%.
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Published date: December 2004
Keywords:
ammonium, chalk bed river dissolved organic nitrogen, nitrate, total dissolved nitrogen
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Local EPrints ID: 53653
URI: http://eprints.soton.ac.uk/id/eprint/53653
ISSN: 1567-7230
PURE UUID: 9a76ad71-442c-4814-9401-24ec9714d29e
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Date deposited: 16 Jul 2008
Last modified: 16 Mar 2024 02:46
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Author:
J.M. Homewood
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