Spatial analysis of herbicide decay rates in Louisiana.
This analysis presents results based on a five-year study recently supported by the Louisiana Department of Transportation and Development (DOTD) in which the acute toxicity, fate and effect of herbicide mixtures on human health and the environment were assessed.
Three sites were routinely sprayed by DOTD to kill weeds along the roadsides.
Two herbicide mixtures were used, 2,4-D and Roundup, and Garlon 3A and Roundup.
Water, vegetation, soil and sediment samples were collected quarterly for three years and were analyzed for pesticide content to study the fate and impact of herbicides in the environment.
Results indicate a correlation between soil type, herbicide type, and persistence of the herbicide in the environment.
Using the correlations found in these data, spatial analysis identified areas where herbicide use may potentially cause surface water and sediment contamination, based on soil composition/properties, type of herbicide applied, and proximity of water bodies to sprayed areas.
Mots-clés Pascal : Qualité eau, Pollution sol, Eau potable, Eau surface, Herbicide, Interaction sol, Devenir polluant, Impact environnement, Toxicité, Analyse spatiale, Système information géographique, Gestion ressource eau
Mots-clés Pascal anglais : Water quality, Soil pollution, Drinking water, Surface water, Herbicide, Soil interaction, Pollutant behavior, Environment impact, Toxicity, Spatial analysis, Geographic information system, Water resource management
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0541732
Code Inist : 001D16A02. Création : 24/03/1998.