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You are here: Home » Latest Issue » Volume 13, 2018 - Number 1 » GROUNDWATER QUALITY ANALYSIS IN WARM SEMI-ARID CLIMATE OF SAHEL COUNTRIES: TILLABÉRI REGION, NIGER, Carpathian Journal of Earth and Environmental Sciences, February 2018, Vol. 13, No. 1, p. 275 – 288; DOI:10.26471/cjees/2018/013/024


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Mahaman Mansir SALIHOU DJARI1, Cristian Constantin STOLERIU2, Mahaman Bachir SALEY1, Alin MIHU-PINTILIE3 & Gheorghe ROMANESCU2
1University Center for Research and Application in Remote Sensing (CURAT), University Felix Houphouet Boigny,22 BP 801 Abidjan 22, Cote d'Ivoire;
2Alexandru Ioan Cuza University of Iasi, Faculty of Geography and Geology, Department of Geography, 20A Carol I Blvd., 700505, Iasi, Romania; Corresponding author: cristoan@yahoo.com
3Alexandru Ioan Cuza University of Iasi, Interdisciplinary Research Department – Field Science, 54 Lasc─âr Catargi St., 700107, Iasi, Romania,


GROUNDWATER QUALITY ANALYSIS IN WARM SEMI-ARID CLIMATE OF SAHEL COUNTRIES: TILLABÉRI REGION, NIGER, Carpathian Journal of Earth and Environmental Sciences, February 2018, Vol. 13, No. 1, p. 275 – 288; DOI:10.26471/cjees/2018/013/024

Full text

Abstract:

The Tillabéry Region in West Africa (Sahel Region) is affected by a severe semi-desert climate. After the rainy season, ponds and the majority of watercourses dry up. Population has to exploit superficial alluvial aquifers using traditional methods. The most important aspect in groundwater supply is its quality. Since 2004, Niger government has been developing a project to provide each village with a source of drinking water. Until now, over 500 boreholes have been made for underground water supply. Thirty-eight boreholes were selected for the groundwater quality assessment (G-WQi), each characterized by 15 different physico-chemical parameters: water temperature, pH, nitrites, nitrates, electrical conductivity, chlorides, sulphates, calcium, magnesium, potassium, fluoride, sodium, bicarbonates, dissolved iron and total manganese. The statistical analysis indicates 7 parameters that do not comply with the standards for drinking-water quality (after World Health Organization): nitrites, nitrates, electrical conductivity, carbonate hardness, sodium concentration, dissolved iron and total manganese. This concentration may have severe implications for human health and can lead to spreading of diseases. According to the G-WQi score, 10 samples belong to the “Good water quality” class, 16 samples belong to the “Medium high water quality” class, 10 samples belong to the “Medium low water quality” class, and 2 samples correspond to the “Poor water quality” class. The results of this study can be useful for a proper managagement of water resources in the Sahel Region.



Keyword: groundwater supply, physico-chemical parameters, water quality index, semi-arid climate, Sahel Region


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