Mapping the groundwater vulnerability for pollution at the pan African scale

The Science of the Total Environment
Issoufou OuedraogoMarnik Vanclooster

Abstract

We estimated vulnerability and pollution risk of groundwater at the pan-African scale. We therefore compiled the most recent continental scale information on soil, land use, geology, hydrogeology and climate in a Geographical Information System (GIS) at a resolution of 15 km × 15 km and at the scale of 1:60,000,000. The groundwater vulnerability map was constructed by means of the DRASTIC method. The map reveals that groundwater is highly vulnerable in Central and West Africa, where the watertable is very low. In addition, very low vulnerability is found in the large sedimentary basins of the African deserts where groundwater is situated in very deep aquifers. The groundwater pollution risk map is obtained by overlaying the DRASTIC vulnerability map with land use. The northern, central and western part of the African continent is dominated by high pollution risk classes and this is very strongly related to shallow groundwater systems and the development of agricultural activities. Subsequently, we performed a sensitivity analysis to evaluate the relative importance of each parameter on groundwater vulnerability and pollution risk. The sensitivity analysis indicated that the removal of the impact of vadose zone, the depth of the...Continue Reading

References

Oct 12, 2004·Journal of Environmental Management·Vito F UricchioNicola Lopez
Aug 30, 2014·PloS One·Tomislav HenglMaria Ruiperez Gonzalez

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Citations

Jul 18, 2016·The Science of the Total Environment·Yang ZhangLi He
Sep 25, 2016·The Science of the Total Environment·Ata Allah NadiriAsghar Asghari Moghaddam
Dec 13, 2017·Environmental Science and Pollution Research International·Issoufou OuedraogoMarnik Vanclooster
Sep 25, 2019·International Journal of Environmental Research and Public Health·Chantal M J HendriksCatherine L Moyes
May 2, 2020·PloS One·Cornelis HoogewegUNKNOWN Acetochlor Registration Partnership
Sep 3, 2020·Environmental Science and Pollution Research International·André Firmin BonBoniface Wangbara Damo
Oct 17, 2017·Environmental Monitoring and Assessment·Prashant KumarSanjit K Debnath
May 8, 2021·Environmental Science and Pollution Research International·Khabat KhosraviAghdas Lotfi
Jan 26, 2020·Ecotoxicology and Environmental Safety·Courage D EgbiSamuel B Dampare

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