Assessing pesticide concentrations and fluxes in the stream of a small vineyard catchment--effect of sampling frequency.

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