Draft:Groundwater in Comoros
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. Young volcanic islands, including the active Karthala volcano on Grande Comore, host two types of aquifers; a widespread basal aquifer characterised by deep groundwater table, high hydraulic conductivity, high recharge rate and saltwater intrusion issues in coastal areas, 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. 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.
Category:Water in Africa
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