GNGTS 2018 - 37° Convegno Nazionale

GNGTS 2018 S essione 3.2 679 GEOELECTRICAL SURVEYS FOR GROUNDWATER INVESTIGATION IN TOGO (AFRICA) S. Piscitelli 1 , J. Bellanova 1 , G. Calamita 1 , G. Romano 2 , C. Amodeo 3 1 National Research Council - Institute of Methodologies for Environmental Analysis (CNR-IMAA), Tito, Italy 2 Department of Geology and Geophysics, University of Bari, Italy 3 Institut National des Sciences Appliquées de Lyon - INSA, Lyon, France Introduction. Despite an increase of drinking water coverage in the last 20 years, rural areas in developing countries have still difficult access to safe water. In this context wells represent an important alternative to improve the water supply. In order to deal with this problem, during August 2012, in the framework of a collaboration with the no-profit organization “Il Pozzo della Farfalla”, based in the town of Potenza (Italy), the Institute of Methodologies for Environmental Analysis of the Italian National Research Council (CNR-IMAA) carried out a geoelectrical survey, by means of the Electrical Resistivity Tomography (ERT) method, in some rural villages of Togo (Africa) for groundwater investigation (Fig. 1). The main aim was to obtain information about the lithological-stratigraphical setting and the presence/depth of both groundwater and crystalline bedrock. These information were crucial in order to support the construction of two new wells, which was the main objective of the project “Costruiamo il 2° Pozzo della farfalla”. Fig. 1 shows the location map of the investigated sites: Apu Kedji, Kevè, Tonouvè, Hagblevou and Dzoto. All the investigated sites are located in the administrative Maritime Region of Togo. From a geological point of view, Apu Kedji, Hagblevou and Dzoto are placed in the sedimentary coastal basin, whereas Kevé and Tonouvé are located on the Panafrican basement (Affaton, 1987). Fig. 1 - Location map of the investigated sites in Togo.