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Article Dans Une Revue Water and Environnment News Année : 2013

Characterizing the Manga aquifer to ensure safe drinking water in South-East Niger

Résumé

Niger is the largest nation in West Africa (with 1.26 million km2), located between the Sahara and sub- Saharan regions without coast line. The majority of the country is covered by desert. Low precipitation (151 mm per year in 2009, World Bank 2010) and recurring droughts have made groundwater an essential water source. In the Diffa region (ca. 150 000 km2), located in south-eastern Niger and in the north-west of Lake Chad, groundwater is an important water source for the local population, together with surface water from Lake Chad and less importantly from the Komadougou Yobe River. A decreasing trend in rainfall, and hence shrinking of the area around Lake Chad, and irrigation development proposed by Nigerian authorities to meet growing food demand have led to actual and potential increases in groundwater exploitation. Moreover, water from Lake Chad has high salt content, limiting its usage. Groundwater resources in the region are found in several aquifer systems: (a) the Manga Quaternary aquifer covering nearly the entire Diffa region at 20 m to more than 50 m depth, except in a central part of the region (less than 10 m depth); (b) the alluvial aquifer located in the Komadougou valley and in topographic depressions of the region at a shallow depth (less than 10 m); (c) the Pliocene aquifer in the Pliocene sands and silts, covering the entire region at about 300 m depth in most of the region or at about 200 m in the central part; (d) the Continental Intercalary/Hamadien aquifer, covering the entire region at 40 to 60 m depth with a very low or zero recharge rate. To improve groundwater resource use and management of the potable water supply in the Diffa region, Technical Cooperation project NER8011 was conducted from 2009- 2012 to characterize the Manga Quaternary aquifer system. The project was entitled Studying the Recharge Process and the Status of Mineral Deposits Within the Manga Aquifer (Diffa region). The project was implemented by le Ministere de L'Hydraulique et de l'Environnement, Direction des Ressources en Eau of Niger
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Dates et versions

hal-00862869 , version 1 (17-09-2013)

Identifiants

  • HAL Id : hal-00862869 , version 1

Citer

R. Sanoussi, A. Guero, K. Zouari, R. Trabelsi, E. Gibert-Brunet. Characterizing the Manga aquifer to ensure safe drinking water in South-East Niger. Water and Environnment News, 2013, 32:, pp.13-15. ⟨hal-00862869⟩
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