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Water Saving in Tank Irrigation Systems in Sahel Region of Africa

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  032245,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.13815) @2003
Authors:   Tahei Yamamoto, F. Amu-Mensah, H. Fujimaki, Hossein DehghaniSanij, Velu Rasiah, J. Utsunomiya
Keywords:   Water harvest, Water saving system, Microirrigation, Apron area, Tank volume, Kenya, Ghana, Niger

This study was aimed at sustainable irrigation development in the Sahel region. Climatic characteristics required for irrigation planning were initially analyzed. Statistical analysis showed that the three countries studied have relatively suitable rainfall for crop growth in normal year, which drastically decreased in draught years. A small-scale microirrigation system with rainwater storage tank was then presented as suitable technology for the development of sustainable irrigation development in the Sahel region having had significant success in the South East Asian regions. The proper apron area, large enough to prevent drying-out of the initially filled tank over the simulated period ranged from 250 to 1,100m2 when the tank capacity is 1,000m3, with the ranking of Perkera > Accra > Tamale > Kumasi > Torodi. Also, water saving potential by introducing microirrigation was promoted for rainy regions.

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