Nitrogen losses from a domestic septic tank system on the Darling Plateau in Western Australia

Movement in groundwater of nitrogen, leaching from a domestic septic tank system, was studied in an area adjacent to a stream on the Darling Plateau in the Shire of Mundaring near Perth in Western Australia. Losses of nitrogen in soil were determined by adding bromide to the septic tank and monitori...

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Bibliographic Details
Published in:Water research (Oxford) 1995-09, Vol.29 (9), p.2055-2058
Main Authors: Gerritse, Robert G., Adeney, John A., Hosking, Jan
Format: Article
Language:English
Subjects:
Applied sciences
denitrification
Exact sciences and technology
Freshwater
groundwater
Groundwaters
Natural water pollution
nitrate
Pollution
Pollution sources. Measurement results
septic tank
soil
Soil and sediments pollution
Water treatment and pollution
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Summary:Movement in groundwater of nitrogen, leaching from a domestic septic tank system, was studied in an area adjacent to a stream on the Darling Plateau in the Shire of Mundaring near Perth in Western Australia. Losses of nitrogen in soil were determined by adding bromide to the septic tank and monitoring the decrease in the ratio of nitrogen to bromide in groundwater, downgradient of the leach drain of the septic tank. At least 80% of inorganic nitrogen leaching into the soil appears to be lost within a distance of 10 m from the leach drain. Published work on changes in 15N/14N isotope ratios of nitrate in sandy aquifers, affected by domestic septic tank systems, seems to indicate that losses of nitrogen are less at higher latitudes.
ISSN:0043-1354
1879-2448
DOI:10.1016/0043-1354(95)00023-E