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Performance evaluation of reservoir-based irrigation schemes in the Upper East region of Ghana

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dc.contributor.author Sekyi-Annan, E.
dc.contributor.author Tischbein, B.
dc.contributor.author Diekkrüger, B.
dc.contributor.author Khamzina, A.
dc.date.accessioned 2022-06-17T15:39:06Z
dc.date.available 2022-06-17T15:39:06Z
dc.date.issued 2018
dc.identifier.citation Sekyi-Annan, E., Tischbein, B., Diekkrüger, B., & Khamzina, A. (2018). Performance evaluation of reservoir-based irrigation schemes in the Upper East region of Ghana. Agricultural Water Management, 202, 134-145. en_US
dc.identifier.uri https://doi.org/10.1016/j.agwat.2018.02.023
dc.identifier.uri http://hdl.handle.net/123456789/2365
dc.description.abstract The design of relevant adaptation strategies for water users in irrigation schemes in the drylands of Sub-Saharan Africa requires up-to-date information about the current performance of these schemes in view of rapid changes in climate and land use, population growth, and competing water demands. Previous assessments focused primarily on field-level crop irrigation; however, information on the performance of schemes as a whole and considering multple water users remains scarce. We examined two (one small- and one medium-scale) irrigation schemes shared by multiple users in the Upper East region of Ghana, including the water reservoir, water conveyance and distribution network, cropping fields, and the management entity. Multi-level performance indicators with relevance to water delivery and utilization as well as to agricultural production during two consecutive dry seasons were used. Technical factors, such as underutilized reservoir storage capacity and deteriorated conditions of water delivery infrastructure, strongly undermined the performance. In particular, the medium-scale irrigation scheme utilized less than 40% of total storage, whereas the small-scale scheme utilized about 70% of the storage. An examination of field-level water management practices suggests that an application efficiency of 58–68% is achievable in both schemes by improving the irrigation scheduling of the major crops. Overall system efficiency can be increased from 50% to 68% by reducing water conveyance network losses and by eliminating over-irrigation of fields. A holistic approach considering all competing water demands is needed for the performance evaluation of reservoir-based irrigation schemes in drylands. en_US
dc.description.sponsorship This study was supported by the German Federal Ministry of Education and Research (BMBF) under the program WASCAL (West African Science Service Center on Climate Change and Adapted Land Use, project No. 00100218) and by the German Academic Exchange Service (DAAD) en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Agricultural Water Management;202
dc.title Performance evaluation of reservoir-based irrigation schemes in the Upper East region of Ghana en_US
dc.type Article en_US

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