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Appraisal of Water Resources for Effective and Sustainable Management
Freshwater scarcity is caused by a long history of poor management of water resources. Typically, humans simultaneously use the same limited water resource for multiple purposes without considering the cumulative impact on this resource. This book elucidates the chemical health status of the Volta Lake ecosystem within the framework of changes in chemical parameters as potential indicators of pollution to ensure the appropriate management of the lake to satisfy the changing demand placed on the lake, safeguard the quality of life of its users, protect its ecosystem and preserve it for future generations. This book adopts an integrated approach to address the general chemical health status of the lake for ecosystem sustainability as well as its trophic state and primary productivity to significantly inform future research needs and approaches for effective and sustainable management.
Smallholder irrigation schemes in the Limpopo Province, South Africa
A survey of 76 public smallholder irrigation schemes in the Limpopo Province was jointly conducted by the International Water Management Institute (IWMI), Department of Agriculture, Forestry and Fisheries (DAFF), South Africa, and the Limpopo Department of Agriculture and Rural Development (LDARD), as part of the ‘Revitalization of Smallholder Irrigation in South Africa’ project. About one-third of those schemes was fully utilized; one-third partially utilized; and one-third not utilized in the winter of 2015; however, no single socioeconomic, physical, agronomic and marketing variable could explain these differences in utilization. Sale, mostly for informal markets, appeared the most important goal. Dilapidated infrastructure was the most important constraint cited by the farmers. The study recommends ways to overcome the build-neglect-rebuild syndrome, and to learn lessons from informal irrigation, which covers an area three to four times as large as public irrigation schemes in the province.
Evaluation des ressources en eau du bassin de la Volta. In French
Le projet « WISE UP to climate » vise a demontrer l'utilite des infrastructures naturelles comme une « solution basee sur la nature » pour l'adaptation au changement climatique et le developpement durable. Dans le bassin de la Volta, les infrastructures naturelles, comme les construites, offrent des benefices pour la subsistance des personnes. Comprendre les interrelations entre ces deux types d'infrastructures est une condition indispensable a une gestion et un developpement durables des ressources en eau. Cela est particulierement vrai dans un contexte ou les pressions sur les ressources en eau s'intensifient, et ou les impacts du changement climatique augmentent. Ce rapport donne un apercu des caracteristiques biophysiques, des services ecosystemiques, et de leur relation avec les moyens de subsistance dans le bassin.
