Influence of sewage inputs and fish farm effluents on dissolved nitrogen species in a chalk river
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), 117-125. (doi:10.1007/s11267-004-3021-5).
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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%.
|Keywords:||ammonium, chalk bed river dissolved organic nitrogen, nitrate, total dissolved nitrogen|
|Subjects:||S Agriculture > SH Aquaculture. Fisheries. Angling
G Geography. Anthropology. Recreation > GE Environmental Sciences
T Technology > TD Environmental technology. Sanitary engineering
|Divisions:||University Structure - Pre August 2011 > School of Civil Engineering and the Environment
University Structure - Pre August 2011 > School of Ocean & Earth Science (SOC/SOES)
|Date Deposited:||16 Jul 2008|
|Last Modified:||27 Mar 2014 18:36|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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