Non-point pollution and management of agricultural areas: phosphorus and nitrogen transfer in a small agricultural watershed

Results are presented from a 3-year study on the water quality in a small experimental agricultural catchment area in France, draining into Geneva lake. Export of nutrients (nitrogen and phosphorus) from the area in relation to input of these elements was estimated. The effects on water quality of s...

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Bibliographic Details
Published in:Water research (Oxford) 1994-01, Vol.28 (2), p.395-410
Main Authors: Dorioz, J M, Ferhi, A
Format: Article
Language:fre
Online Access:Get full text
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Summary:Results are presented from a 3-year study on the water quality in a small experimental agricultural catchment area in France, draining into Geneva lake. Export of nutrients (nitrogen and phosphorus) from the area in relation to input of these elements was estimated. The effects on water quality of storm flows with limited surface run-off, significant surface run-off, and important sub-surface run-off were identified. Changes in water quality during transfer should be taken into account, as well as nutrient concentrations observed at the outlet, when assessing the impacts of non-point loads from agricultural areas. An experimental wetland improved water quality significantly by acting as a nutrient sink. Various buffer zones were also effective. There are 71 references. (English translation 620 pounds sterling, valid for 1994).
ISSN:0043-1354