Sur ce thème, nous vous proposons deux études sur le Ghana et le Bassin de la Volta, que vous trouverez successivement ci-dessous.
Namara, Regassa E. ; Awuni, J. A. ; Barry, Boubacar ; Giordano, Mark ; Hope, Lesley ; Owusu, Eric S. ; Forkuor, Gerald. 2011. Smallholder shallow groundwater irrigation development in the upper east region of Ghana. Colombo, Sri Lanka : International Water Management Institute (IWMI). 35p. (IWMI Research Report 143)
Résumé (par les auteurs) :
In sub-Saharan Africa, there is paucity of information on the potential of groundwater resources. The limited available information paints a pessimistic view about groundwater resources. Due to its perceived inadequate availability, groundwater associated with domestic use and the potential for using it for agriculture are not well reflected in the national irrigation polices. Contrary to official pessimism, farmers do use groundwater for agriculture in many countries of sub-Saharan Africa including Ghana. This paper analyzes the current extent of use, economics, socioeconomic impacts, and constraints and opportunities of shallow groundwater irrigation based on the experiences of smallholders in the three micro-watersheds of the White Volta Basin in the Upper East Region of Ghana.
Barry, Boubacar ; Kortatsi, B. ; Forkuor, G. ; Gumma, M. K. ; Namara, Regassa E. ; Rebelo, Lisa-Maria ; van den Berg, J. ; Laube, W. 2010. Shallow groundwater in the Atankwidi Catchment of the White Volta Basin : current status and future sustainability. Colombo, Sri Lanka : International Water Management Institute (IWMI). 23p. (IWMI Research Report 139)
Résumé (par les auteurs) :
The Atankwidi Catchment, which lies in the White Volta Basin in West Africa, is intensively cultivated by locals for economic gains. During dry seasons, farmers irrigate their crops, chiefly tomatoes, using shallow groundwater harvested from shallow ponds they dig using simple tools like an axe, hoe, bucket and bowls. Recent expansion in cultivated areas has brought to the fore the need to estimate the volume of shallow groundwater stored in the catchment’s underlying aquifer and to what extent it can sustain the incremental growth in irrigated areas.
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