title: Speciation and origin of particulate copper in runoff water from a Mediterranean vineyard catchment.
abstract: Fungicide treatments have led to large copper contents of the topsoils of most vineyards. This paper examines the contamination of surface waters by copper in a Mediterranean wine-growing catchment. Its aims were to characterise the forms of copper associated with suspended matter during a heavy autumn storm event and to identify which soils contribute the most to the copper exports. A mixing model involving three reservoirs, corresponding to three soil-landscape units (plateau, terraces and footslope-depression system) and two tracers (reducible iron content and dolomite/calcite ratio) was used to estimate the contribution of each reservoir to erosion during a storm flow. The average copper concentration of the suspended matter was 245 mg kg(-1), of which 1% was exchangeable, 4% acid-soluble, 10% oxidizable, 23% reducible and 63% residual. The soils of the plateau of the catchment (chromic luvisols and haplic calcisols-FAO soil classification) were the source of 42% of copper exports but represented only 27% of the total catchment area.
authors.affiliation: Unité de Science du Sol INRA, Montfaret, France.
authors.forename: O
authors.initials: O
authors.lastname: Ribolzi
authors.forename: V
authors.initials: V
authors.lastname: Valles
authors.forename: L
authors.initials: L
authors.lastname: Gomez
authors.forename: M
authors.initials: M
authors.lastname: Voltz
mesh_terms: D000383:Agriculture; D003300:Copper / Q000032:analysis* / Q000737:chemistry*; D004784:Environmental Monitoring; D005659:Fungicides, Industrial; D012989:Soil Pollutants / Q000032:analysis*; D014872:Water Movements; D014881:Water Supply; D014920:Wine
chemical_list: D005659:Fungicides, Industrial; D012989:Soil Pollutants; D003300:Copper