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Int J Environ Res Public Health. 2017 Nov 10;14(11). pii: E1369. doi: 10.3390/ijerph14111369.

Integration of GIS, Electromagnetic and Electrical Methods in the Delimitation of Groundwater Polluted by Effluent Discharge (Salamanca, Spain): A Case Study.

Author information

1
Department of Geology, Faculty of Sciences, University of Salamanca, 37008 Salamanca, Spain. r11vidal@usal.es.
2
Department of Geology, Faculty of Sciences, University of Salamanca, 37008 Salamanca, Spain. amgranna@usal.es.
3
Department of Geology, Faculty of Sciences, University of Salamanca, 37008 Salamanca, Spain. jrmc@usal.es.
4
Department of Geology, Faculty of Sciences, University of Salamanca, 37008 Salamanca, Spain. puy@usal.es.
5
Department of Geology, Faculty of Sciences, University of Salamanca, 37008 Salamanca, Spain. javisan@usal.es.
6
CSIC-National Museum of Natural Sciences, Geology Section, 28006 Madrid, Spain. mczc65@mncn.csic.es.

Abstract

The present work envisages the possible geometry of a contaminated plume of groundwater near hospital facilities by combining GIS (Geographic Information System) and geophysical methods. The rock underlying the soil and thin sedimentary cover of the study area is moderately fractured quartzite, which makes aquifers vulnerable to pollution. The GIS methodology is used to calculate the area that would be affected by the effluent source of residual water, based on algorithms that consider ground surface mapping (slopes, orientations, accumulated costs and cost per distance). Geophysical methods (electromagnetic induction and electric resistivity tomography) use changes in the electrical conductivity or resistivity of the subsurface to determine the geometry of the discharge and the degree of contamination. The model presented would allow a preliminary investigation regarding potential corrective measures.

KEYWORDS:

GIS; effluent discharge; geophysics; groundwater; pollution

PMID:
29125556
PMCID:
PMC5708008
DOI:
10.3390/ijerph14111369
[Indexed for MEDLINE]
Free PMC Article

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