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Sedimentation in the Mosul reservoir of northern Iraq
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.ORCID-id: 0000-0002-6790-2653
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.
Ministry of Higher Education, KRG.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.ORCID-id: 0000-0002-1365-8552
2013 (engelsk)Inngår i: Journal of Environmental Hydrology, ISSN 1058-3912, E-ISSN 1996-7918, Vol. 21, nr 7, s. 1-10Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Mosul Dam is one of the biggest hydraulic structures in Iraq. It was constructed in 1986 on the Tigris River in the north of Iraq for multiple purposes: irrigation, flood control and power generation. The initial storage capacity and water surface area of its reservoir reaches 11.11 km3 and 380 km2 respectively at the maximum operation level 330 m a.s.l. The dam was operated in 1986. Blockage of the intakes of the pump station for North Al-Jazira Irrigation Project in Mosul Dam reservoir has highlighted the importance of sedimentation problems within the reservoir. A total of 56 samples were collected from the bottom of Mosul reservoir covering most of the reservoir area. The results of the analysis of these samples revealed that they were composed of gravel (3.8%), sand (15%), silt (55.5%) and clay (25.7%). The distribution of these sediments indicates that the silt portion represents the highest 77% of the bottom sediments of this reservoir followed by clay (13.5%) and then sand (9.5%). However, sand percentages are the highest in the northern zone of the reservoir where the River Tigris enters the reservoir and decreases gradually toward the dam site. In the meantime, silt percentage decreases toward the dam site while the finer fraction (i.e. clay) increases. Statistically, the average median and mean sizes of the sediments are 2.81 phi (0.142 mm) and 6.1 phi (0.0146 mm) respectively. In addition, the sediments are poorly sorted, nearly symmetrical in skewness and leptokurtic, very leptokurtic, to mesocratic. Finally, it is believed that the geometry and hydrodynamics of the Mosul reservoir, the location of the River Tigris entrance together with the side tributary valleys have played the most important role in the sediments distribution and their characteristics.

sted, utgiver, år, opplag, sider
2013. Vol. 21, nr 7, s. 1-10
HSV kategori
Forskningsprogram
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URN: urn:nbn:se:ltu:diva-12553Lokal ID: bb517b81-4d97-4c85-9c3d-b1532a92af98OAI: oai:DiVA.org:ltu-12553DiVA, id: diva2:985504
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Validerad; 2013; 20130610 (nadhir)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2017-11-24bibliografisk kontrollert

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