Draft:Groundwater in Comoros

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The Comoros Islands is an archipelago of four major volcanic (Ngazidja, also known as Grande Comore; Ndzuwani, also known as Anjouan; Mwali, also known as Mohéli; Mayotte) and smaller coral islands (the Glorioso Islands) off the east coast of Africa, in the Mozambique Channel. The population is ethnically diverse as a result of centuries of immigration by Indonesian, Bantu African and Arabic peoples, among others.

Groundwater resources and occurrence across the Comoros Islands are variable owing to geological variability[1]. Young volcanic islands, including the active Karthala volcano on Grande Comore, host two types of aquifers[2][3]; a widespread basal aquifer characterised by deep groundwater table, high hydraulic conductivity, high recharge rate and saltwater intrusion issues in coastal areas[4], and local perched aquifer systems. Older, weathered volcanic islands such as Mayotte are characterised by more complex groundwater occurence through discontinuous successions of perched aquifers[5][6]. The Glorioso coral islands host a shallow freshwater lens fed by rainfall infiltration where freshwater-saltwater interactions and spatial patterns are strongly influenced by topography and evapotranspiration processes[7].
Category:Water in Africa


  1. ^ Ground water in eastern, central, and southern Africa. United Nations. Department of Technical Cooperation for Development. New York: United Nations. 1989. ISBN 9211042232. OCLC 20733831.CS1 maint: others (link)
  2. ^ Bourhane, Anli; Comte, Jean-Christophe; Join, Jean-Lambert; Ibrahim, Kassim (2016), Bachelery, Patrick; Lenat, Jean-François; Di Muro, Andrea; Michon, Laurent (eds.), "Groundwater Prospection in Grande Comore Island—Joint Contribution of Geophysical Methods, Hydrogeological Time-Series Analysis and Groundwater Modelling", Active Volcanoes of the Southwest Indian Ocean: Piton de la Fournaise and Karthala, Active Volcanoes of the World, Springer Berlin Heidelberg, pp. 385–401, doi:10.1007/978-3-642-31395-0_24, ISBN 9783642313950, retrieved 2019-09-24
  3. ^ Join, Jean-Lambert; Folio, Jean-Luc; Bourhane, Anli; Comte, Jean-Christophe (2016), Bachelery, Patrick; Lenat, Jean-François; Di Muro, Andrea; Michon, Laurent (eds.), "Groundwater Resources on Active Basaltic Volcanoes: Conceptual Models from La Réunion Island and Grande Comore", Active Volcanoes of the Southwest Indian Ocean: Piton de la Fournaise and Karthala, Active Volcanoes of the World, Springer Berlin Heidelberg, pp. 61–70, doi:10.1007/978-3-642-31395-0_5, ISBN 9783642313950, retrieved 2019-09-24
  4. ^ Comte, Jean-Christophe; Cassidy, Rachel; Obando, Joy; Robins, Nicholas; Ibrahim, Kassim; Melchioly, Simon; Mjemah, Ibrahimu; Shauri, Halimu; Bourhane, Anli; Mohamed, Ibrahim; Noe, Christine (2016-03-01). "Challenges in groundwater resource management in coastal aquifers of East Africa: Investigations and lessons learnt in the Comoros Islands, Kenya and Tanzania". Journal of Hydrology: Regional Studies. 5: 179–199. doi:10.1016/j.ejrh.2015.12.065. ISSN 2214-5818.
  5. ^ Lachassagne, Patrick; Aunay, Bertrand; Frissant, Nicolas; Guilbert, Maud; Malard, Arnauld (2014). "High-resolution conceptual hydrogeological model of complex basaltic volcanic islands: a Mayotte, Comoros, case study". Terra Nova. 26 (4): 307–321. doi:10.1111/ter.12102. ISSN 1365-3121.
  6. ^ Vittecoq, B.; Deparis, J.; Violette, S.; Jaouën, T.; Lacquement, F. (2014-02-13). "Influence of successive phases of volcanic construction and erosion on Mayotte Island's hydrogeological functioning as determined from a helicopter-borne resistivity survey correlated with borehole geological and permeability data". Journal of Hydrology. 509: 519–538. doi:10.1016/j.jhydrol.2013.11.062. ISSN 0022-1694.
  7. ^ Comte, Jean-Christophe; Join, Jean-Lambert; Banton, Olivier; Nicolini, Eric (2014-12-01). "Modelling the response of fresh groundwater to climate and vegetation changes in coral islands". Hydrogeology Journal. 22 (8): 1905–1920. doi:10.1007/s10040-014-1160-y. ISSN 1435-0157.