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Sediment flux from Lesser Zab River in Dokan Reservoir: Implications for the sustainability of long‐term water resources in Iraq
College of Engineering, University of Baghdad, Baghdad, Iraq.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
College of Engineering, Department of Civil Engineering, Koya University, Koya, Iraq.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-6790-2653
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2020 (English)In: Rivers Research and Applications: an international journal devoted to river research and management, ISSN 1535-1459, E-ISSN 1535-1467, Vol. 36, no 3, p. 351-361Article in journal (Refereed) Published
Abstract [en]

Prudent management of Iraqi water resources under climate change conditions requires plans to be based on actual figures of the storage capacity of existing reservoirs. With the absence of sediment flushing measures, the actual storage capacity of Dokan Reservoir (operated since 1959) has been affected by the amount of sediment delivered during its operational life leading to an undetermined reduction in its storage capacity. In consequence, there has not been an update on the dam's operational storage capacity curves. In this research, new operational curves were established for the reservoir based on a recent bathymetric survey undertaken in 2014. The reduction in reservoir capacity during the period between 1959 and 2014 was calculated by the mean of the difference between the designed storage capacity and the storage capacity which was concluded from the 2014 bathymetric survey. Moreover, the rate of sediment transported to the reservoir was calculated based on the overall quantities of accumulated sediment and the water discharge of the Lesser Zab River into the reservoir. The results indicate that the dam capacity is reduced by 25% due to sedimentation of an estimated volume of 367 million cubic metres at water level 480 m.a.s.l. The annual sedimentation rate was about 6.6 million cubic metres, and the sediment yield was estimated to be 701.2 t∙km−3∙year.

Place, publisher, year, edition, pages
USA: John Wiley & Sons, 2020. Vol. 36, no 3, p. 351-361
Keywords [en]
Dokan Dam, Dokan Reservoir, sediment transport, storage capacity
National Category
Geotechnical Engineering
Research subject
Soil Mechanics; Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-77559DOI: 10.1002/rra.3595ISI: 000509981600001OAI: oai:DiVA.org:ltu-77559DiVA, id: diva2:1389887
Note

Validerad;2020;Nivå 2;2020-03-06 (johcin)

Available from: 2020-01-30 Created: 2020-01-30 Last updated: 2020-03-06Bibliographically approved

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Hassan, RebwarAl-Ansari, NadhirKnutsson, Sven

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