کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4426451 1309126 2010 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Assessing pesticide concentrations and fluxes in the stream of a small vineyard catchment – Effect of sampling frequency
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Assessing pesticide concentrations and fluxes in the stream of a small vineyard catchment – Effect of sampling frequency
چکیده انگلیسی

This study reports on the occurrence and behaviour of six pesticides and one metabolite in a small stream draining a vineyard catchment. Base flow and flood events were monitored in order to assess the variability of pesticide concentrations according to the season and to evaluate the role of sampling frequency on the evaluation of fluxes estimates. Results showed that dissolved pesticide concentrations displayed a strong temporal and spatial variability. A large mobilisation of pesticides was observed during floods, with total dissolved pesticide fluxes per event ranging from 5.7 × 10−3 g/Ha to 0.34 g/Ha. These results highlight the major role of floods in the transport of pesticides in this small stream which contributed to more than 89% of the total load of diuron during August 2007. The evaluation of pesticide loads using different sampling strategies and method calculation, showed that grab sampling largely underestimated pesticide concentrations and fluxes transiting through the stream.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 158, Issue 3, March 2010, Pages 737–748
نویسندگان
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