A method is proposed that uses analysis of borehole stratigraphic logs for the characterization of shallow aquifers and for the assessment of areas suitable for manual drilling. The model is based on available borehole-log parameters: depth to hard rock, depth to water, thickness of laterite and hydraulic transmissivity of the shallow aquifer. The model is applied to a study area in northwestern Senegal. A dataset of boreholes logs has been processed using a software package (TANGAFRIC) developed during the research. After a manual procedure to assign a standard category describing the lithological characteristics, the next step is the automated extraction of different textural parameters and the estimation of hydraulic conductivity using reference values available in the literature. The hydraulic conductivity values estimated from stratigraphic data have been partially validated, by comparing them with measured values from a series of pumping tests carried out in large-diameter wells. The results show that this method is able to produce a reliable interpretation of the shallow hydrogeological context using information generally available in the region. The research contributes to improving the identification of areas where conditions are suitable for manual drilling. This is achieved by applying the described method, based on a structured and semi-quantitative approach, to classify the zones of suitability for given manual drilling techniques using data available in most African countries. Ultimately, this work will support proposed international programs aimed at promoting low-cost water supply in Africa and enhancing access to safe drinking water for the population.

Fussi, F., Fumagalli, M., Fava, F., Di Mauro, B., Kane, C., Niang, M., et al. (2017). Classifying zones of suitability for manual drilling using textural and hydraulic parameters of shallow aquifers: a case study in northwestern Senegal. HYDROGEOLOGY JOURNAL, 25(8), 2263-2279 [10.1007/s10040-017-1642-9].

Classifying zones of suitability for manual drilling using textural and hydraulic parameters of shallow aquifers: a case study in northwestern Senegal

Fumagalli, Maria Letizia
Secondo
Membro del Collaboration Group
;
Fava, Francesco
Membro del Collaboration Group
;
Di Mauro, Biagio
Membro del Collaboration Group
;
Colombo, Roberto
Penultimo
Membro del Collaboration Group
;
Bonomi, Tullia
Ultimo
Membro del Collaboration Group
2017

Abstract

A method is proposed that uses analysis of borehole stratigraphic logs for the characterization of shallow aquifers and for the assessment of areas suitable for manual drilling. The model is based on available borehole-log parameters: depth to hard rock, depth to water, thickness of laterite and hydraulic transmissivity of the shallow aquifer. The model is applied to a study area in northwestern Senegal. A dataset of boreholes logs has been processed using a software package (TANGAFRIC) developed during the research. After a manual procedure to assign a standard category describing the lithological characteristics, the next step is the automated extraction of different textural parameters and the estimation of hydraulic conductivity using reference values available in the literature. The hydraulic conductivity values estimated from stratigraphic data have been partially validated, by comparing them with measured values from a series of pumping tests carried out in large-diameter wells. The results show that this method is able to produce a reliable interpretation of the shallow hydrogeological context using information generally available in the region. The research contributes to improving the identification of areas where conditions are suitable for manual drilling. This is achieved by applying the described method, based on a structured and semi-quantitative approach, to classify the zones of suitability for given manual drilling techniques using data available in most African countries. Ultimately, this work will support proposed international programs aimed at promoting low-cost water supply in Africa and enhancing access to safe drinking water for the population.
Articolo in rivista - Articolo scientifico
Drilling; Groundwater development; Senegal; Unconsolidated sediments; Water supply; Water Science and Technology; Earth and Planetary Sciences (miscellaneous)
English
2017
2263
2279
17
Fussi, F., Fumagalli, M., Fava, F., Di Mauro, B., Kane, C., Niang, M., et al. (2017). Classifying zones of suitability for manual drilling using textural and hydraulic parameters of shallow aquifers: a case study in northwestern Senegal. HYDROGEOLOGY JOURNAL, 25(8), 2263-2279 [10.1007/s10040-017-1642-9].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/177284
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