Issue |
La Houille Blanche
Number 5, Août 1999
|
|
---|---|---|
Page(s) | 81 - 86 | |
DOI | https://doi.org/10.1051/lhb/1999061 | |
Published online | 01 August 2009 |
Quelques aspects hydrologiques des transferts de solutés par infiltration vers les nappes : nitrates et phytosanitaires
Some hydrologie aspects of solutes transport by infiltration towards the aquifers: nitrates and pesticides
1
Service Géologique National, BRGM
2
Direction de la Recherche, BRGM
Abstract
The contamination of groundwater by substances, mainly nitrates and pesticides, resulting from agricultural activities depends on three essential factors:
- the physical characteristics of the aquifer system: these characteristics play a major role in protecting the groundwater against pollutants (attenuation) and/or in postponing the outbreak of the contamination (delay);
- the intensity and mode of groundwater recharge: the infiltrating water is the transfer vector of contaminants towards the groundwater;
- the quantities of solutes available for infiltration towards the groundwater, i.e. the quantities not retained by the soil/plant/microorganism system. The paper presents some major characteristics of the main types of aquifer in France, notably with regard to pollution vulnerability, and data on the spatial variability and quantitative importance of infiltration, a mechanism that plays a key role in the pollutant concentrations likely to be reached in the groundwater.
© Société Hydrotechnique de France, 1999
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.