Hydrodynamic and geochemical constraints on pesticide concentrations in the groundwater of an agricultural catchment (Brevilles, France)

被引：44

作者：

Baran, N. ^{[1
]}

Mouvet, C. ^{[1
]}

Negrel, Ph. ^{[1
]}

机构：

[1] Bur Rech Geol & Minieres, F-45060 Orleans 2, France

来源：

ENVIRONMENTAL POLLUTION | 2007年 / 148卷 / 03期

关键词：

pesticide; catchment; groundwater; Water Framework Directive; tritium;

D O I：

10.1016/j.envpol.2007.01.033

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The monitoring of a spring and seven piezometers in the 3 km(2) Brevilles agricultural catchment (France) over five and a half years revealed considerable spatial and temporal variability in the concentrations of atrazine and its metabolite deethylatrazine (both systematically quantified at the outlet spring): maximum 0.97 and 2.72 mu g L-1, mean 0.19 and 0.59 mu g L-1, respectively. Isoproturon, the pesticide applied in the greatest amount, was detected in only 10 of the 133 samples. These observations can only partly be explained by land use and intrinsic pesticide properties. Geochemical measurements and tritium dating showed the importance of the stratification of the sandy saturated zone and the buffer function of the unsaturated limestone. Principal component analysis on 39 monthly data series of atrazine, deethylatrazine, nitrate, chloride and piezometric levels revealed a temporal structuring of the data possibly reflecting the existence within the aquifer of two different reservoirs with time-variable contributions. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：729 / 738

页数：10

共 37 条

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