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African Water Development Report 2006 - United Nations Economic ...

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Fig. 6.2: Freshwater Ecosystem AreasAlgeriaAngolaBeninBotswanaBurkina FasoBurundiCameroonCape VerdeC. <strong>African</strong> RepChadComorosCongoCongo, Dem RepCôte d'IvoireDjiboutiEgyptEq. GuineaEritreaEthiopiaGabonGambiaGhanaGuineaGuinea-BissauKenyaLesothoLiberiaLibyaMadagascarMalawiMaliMauritaniaMauritiusMoroccoMozambiqueNamibiaNigerNigeriaRéunionRwandaSaint HelenaSao Tome &SenegalSeychellesSierra LeoneSomaliaSouth AfricaSudanSwazilandTanzaniaTogoTunisiaUgandaZambiaZimbabwe0 10000 20000 30000 40000 50000 60000 70000Protecting Ecosystems in AfricaEcosystem AreasSource: World Resource Institute; Loveland el al. 2000Groundwater Ecosystems in the CongoGeological characterization of the four mainaquifer systems within the Congolese territoryare roughly distributed as follows (AWDR National<strong>Report</strong>, 2003):(a) Aquifers of the coastal sedimentary basin(Secondary, tertiary and quaternary): 6,000km2;(b) Aquifers of the sedimentary basin of theCongo River (Secondary, tertiary and quaternary):224,000 km2;(c) Aquifers of the series of old sedimentary(Upper precambrian) rocks: 68,000 km2;(d) Aquifers of the crystalline and schistosecrystalline (Middle and lower precambrian)rocks: 44,000 km2129

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