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CNR: Alamanacco della Scienza

Archivio

N. 6 - 27 mar 2013
ISSN 2037-4801

International info   a cura di Cecilia Migali

Agroalimentare

Italian National Research Council in Africa

Carrying out wells for potable water supply in the rural villages of Togo. This is the aim of the collaboration between Cnr-Institute of Methodologies for Environmental Analysis (Imaa) and the no-profit organization 'Il pozzo della farfalla' of Potenza (Italy).

Togo is a small sub-Saharan nation of West Africa. Although the Joint Monitoring Program (Jmp) for water supply and sanitation reported (March 2012) an increase of more than 10%, from 49 to 61%, for drinking water coverage, in the rural zones the increase was substantially lower, from 36 to 40 %. In the frame of the battle against poverty and of the achievement of the Objectives of the Millennium for the Development (Omd), the improvement of drinkable water supply for the population represents a vital issue for Togo.

The main contribute of Cnr-Imaa is to apply a subsurface geophysical prospecting technique, the Electrical Resistivity Tomography (Ert) method, to give information about the lithological-stratigraphical setting and the presence/depth of both groundwater and crystalline bedrock, providing support in the preliminary phases of the construction of new wells.

Due to the lack of geological and borehole data and to the intrinsic limit of all geophysical methods, when not calibrated with other direct data, the interpretation of the electrical images is, at this stage, only speculative and merely qualitative. Quantitative results could derive only by the comparison and calibration with data coming from other geophysical techniques (e.g. seismic) and/or boreholes.  

Fonte: Vincenzo Lapenna, Istituto di metodologie per l'analisi ambientale, Tito Scalo, tel. 0971/427206, email vincenzo.lapenna@imaa.cnr.it