Managed Aquifer Recharge in Africa: Taking Stock and Looking Forward

摘要: Climatic variability and change result in unreliable uncertain water availability contribute to insecurity Africa, particularly arid semi-arid areas where storage infrastructure is limited. Managed aquifer recharge (MAR), which comprises purposeful of surface runoff treated wastewater aquifers, serves various purposes, a prominent one provide means mitigate adverse impact climate variability. Despite clear scope for this technology the prevalence range MAR experiences Africa have not been extensively examined. The objective article an overview progress inform potential future use approach continent. Information on from 52 cases listed Global Portal collated relevant literature was analyzed. Cases were classified according 13 key characteristics including project, applied, biophysical conditions, technical management challenges. Results review indicate that: (i) extent practice relatively limited, (ii) main secure augment supply balance demand, (iii) spreading/infiltration method most common method, (iv) source MAR, (v) total annual volume about 158 Mm3/year. schemes exist both urban rural exemplify advancement implementation as well its out scaling potential. Further, are commonly found high inter-annual availability. If properly planned, implemented, managed, maintained adapted local has large securing increasing resilience Africa. Ultimately, realizing full will require undertaking hydrogeological hydrological studies determine feasibility especially geographic regions growing demand. This, supported by increased research gauge success existing projects address challenges, would help with siting, design