Assessing the vulnerability of groundwater resources in semiarid lands of central Argentina

Authors
Montoya, Jorgelina Ceferina; Porfiri, Carolina; Roberto, Zinda Edith; Viglizzo, Ernesto Francisco
Publication Year
2018
Language
English
Format
article
Status
Published version
Description
Groundwater resources in semiarid lands of central Argentina are currently threatened by contamination from agricultural pesticides. The objectives of the present work were: (a) to estimate groundwater recharge on a monthly basis to identify periods of high susceptibility of the aquifers to be polluted, (b) to assess groundwater vulnerability to pollution using the Generic and Pesticides DRASTIC GIS-based model for each recharge month previously identified, (c) to quantify the presence of atrazine, imazapyr, glyphosate, and its metabolite AMPA in groundwater, and (d) to check the application of the DRASTIC model in the semiarid lands of central Argentina. According to the estimation of groundwater recharge, the vulnerability of aquifers increases during March, April, and November. The six resultant vulnerability maps revealed that groundwater is under “high-to-moderate” risk of pollution in the study area. About 47 and 88% of the total area is highly vulnerable, according to the Generic and Pesticides DRASTIC maps, respectively. Atrazine and imazapyr were quantified in groundwater at concentrations greater than 0.1 µg l−1 in four of the analyzed compounds. Potential pollution of groundwater was conditioned by the spatial variability of geomorphological features, and influenced by others variables such as the intensity of herbicides use and the physicochemical properties of the compounds. In the present study, groundwater pollution is in line with the DRASTIC maps.
Fil: Montoya, Jorgelina Ceferina. INTA. Estación Experimental Agropecuaria Anguil; Argentina
Fil: Porfiri, Carolina. INTA. Estación Experimental Agropecuaria Anguil; Argentina
Fil: Roberto, Zinda Edith. INTA. Estación Experimental Agropecuaria Anguil; Argentina
Fil: Viglizzo, Ernesto Francisco. INTA. Estación Experimental Agropecuaria Anguil; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias de la Tierra y Ambientales de La Pampa. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Instituto de Ciencias de la Tierra y Ambientales de La Pampa; Argentina. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales; Argentina
Source
Sustainable Water Resources Management : 1–16. (09 June 2018)
Subject
Recursos Hídricos
Aguas Subterráneas
Zona Semiárida
Residuos de Plaguicidas
Polución del Agua
Water Resources
Groundwater
Semiarid Zones
Pesticide Residues
Water Pollution
Argentina
Access level
Restricted access
License
Repository
INTA Digital (INTA)
Institution
Instituto Nacional de Tecnología Agropecuaria
OAI Identifier
oai:localhost:20.500.12123/3910