Assessing sediment inputs to small reservoirs in Upper East Region, Ghana

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dc.contributor.authorAdwubi, Afua
dc.contributor.authorAmegashie, Bright Kofi
dc.contributor.authorAgyare, W. A.
dc.contributor.authorTamene, Lulseged
dc.contributor.authorOdai, Samuel Nii
dc.contributor.authorQuansah, Charles
dc.contributor.authorVlek, Paul
dc.date.accessioned2020-05-26T13:55:39Z
dc.date.accessioned2023-04-19T01:53:38Z
dc.date.available2020-05-26T13:55:39Z
dc.date.available2023-04-19T01:53:38Z
dc.date.issued2009-10
dc.descriptionThis article is published in Lakes & Reservoirs Research & Management and also available at DOI: 10.1111/j.1440-1770.2009.00410.xen_US
dc.description.abstractMany small dams and dugouts have been constructed in the Upper East Region of Ghana to address the problem of regional water scarcity. The reservoirs were constructed primarily as water supplies for agricultural irrigation and livestock watering, aquaculture and domestic use. However, many of the reservoirs dry up during the dry season, affecting the livelihoods of their basin inhabitants. A major cause for the dried reservoirs is siltation, which reduces the reservoir’s storage capacities. The goal of this study is to quantify the annual siltation rate of four study reservoirs, using a bathymetric survey and reservoir soil sampling. The sediment yield and its relation to catchment area also were assessed. The results of this study indicate that the annual siltation rates are 1272, 3518, 2764 and 6135 t year)1 for Doba, Dua, Zebilla and Kumpalgogo reservoirs, respectively. Analyses of the sediment yield and catchment areas illustrated that the sediment yields decreased with increasing catchment area. All the study reservoirs have lost their dead storage capacity, which was meant to store sediment until the end of their anticipated design lives. The decreasing storage capacity because of siltation will affect the livelihoods of the local basin inhabitants, as the reservoirs will not be able to achieve all their intended purposes. The results of this study indicate that, because siltation is not the only factor threatening the benefits gained from the reservoirs, the integrated assessment of all relevant factors is required.en_US
dc.description.sponsorshipKNUSTen_US
dc.identifier.citationLakes & Reservoirs Research & Management, 14(4):279 - 287en_US
dc.identifier.uri10.1111/j.1440-1770.2009.00410.x
dc.identifier.urihttps://ir.knust.edu.gh/handle/123456789/12172
dc.language.isoenen_US
dc.publisherLakes & Reservoirs Research & Managementen_US
dc.subjectbathymetric surveyen_US
dc.subjectGhanaen_US
dc.subjectsediment yielden_US
dc.subjectsiltationen_US
dc.subjectsmall reservoirsen_US
dc.titleAssessing sediment inputs to small reservoirs in Upper East Region, Ghanaen_US
dc.typeArticleen_US
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