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Application of swat model to estimate the sediment load from the left bank of Mosul dam
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.ORCID-id: 0000-0002-6790-2653
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.ORCID-id: 0000-0001-6547-2410
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.ORCID-id: 0000-0002-1365-8552
2013 (engelsk)Inngår i: Journal of Advanced Science and Engineering Research, ISSN 2231-8844, Vol. 3, nr 1, s. 47-61Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Mosul dam is the biggest dam in Iraq on Tigris River. It is a multipurpose dam with a designed storage capacity of 11.11*109 m3. The Soil and Water Assessment Tool (SWAT) working with Geographical Information System (GIS) was applied to simulate the daily runoff and sediment yield from the seven valleys entering the reservoir from the left side. The model was applied for the period 1988-2008 based on daily climatic data of Mosul city and Mosul Dam Stations. The results indicated that the average yearly water flow was 13.8 *106 m3. It varies with time and among the valleys depending on the soil type, land watershed topography, watershed area in addition the other effective factors, and rainfall depth of that year. The resultant average annual sediment yield was 702*106 ton from these valleys. The sediment yield from each valley depends on runoff coefficient of the valley, soil type and plant cover. These factors affect soil detachment and rainfall properties (depth and intensity) that in turn affect rainfall detachment force. The total sediment yield for the considered period was 14753*103 ton. This represent about 0.42% of the dead storage of the reservoir (2.9*109m3) which is about 0.11% of the total reservoir storage capacity.

sted, utgiver, år, opplag, sider
2013. Vol. 3, nr 1, s. 47-61
HSV kategori
Forskningsprogram
Geoteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-15897Lokal ID: f7703d5f-6cdb-4e25-881f-57c4d82e6325OAI: oai:DiVA.org:ltu-15897DiVA, id: diva2:988873
Merknad
Validerad; 2013; 20130311 (nadhir)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2020-02-27bibliografisk kontrollert
Inngår i avhandling
1. Sedimentation and Its Challenge for Sustainability of  Hydraulic Structures: A Case Study of Mosul Dam Pumping Station
Åpne denne publikasjonen i ny fane eller vindu >>Sedimentation and Its Challenge for Sustainability of  Hydraulic Structures: A Case Study of Mosul Dam Pumping Station
2020 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

A successful management and operation of water resources projects are essential to maintain their functions. Dams and reservoirs are one of the largest worldwide infrastructures. They serve one or more functions; reliable store and release of water for different purposes, hydropower generation and   flood and draught controls. Sedimentation is one of the serious problems that affects the reservoir`s efficiency; it leads to reduction in storage capacity and reliability for water supply. Furthermore, deposition of sediment near and inside the intakes and hydropower plants cause a negative effect on plant efficiency and corrosion of turbines and pump`s impeller.    Generally, degradations of the watersheds, surface runoff and river flow are the main sources and transporters of the reservoir’s sediment.    Sediment management techniques are the most economical and efficient approach for sustainability of reservoirs and attached structures. Pumping rate, operation schedule, sub watersheds sediment control and earth dike is the reasonable alternatives that were applied in this study for sediment control and sustain water intakes.  In Mosul Dam reservoir, the pumping station is considered as a case study, the station is suffering from sediment accumulation in front and inside the intake. The work includes application of Soil and Water Assessment Tool (SWAT) models to estimate the runoff and sediment load delivered by sub watersheds surrounding the studied area, and a sediment rating curve was considered to assess the sediment load carried by the main river (Tigris River). The Hydrological Engineering Centre’s River Analysis System ( HEC-RAS) model   as a one dimensional model (1-D) was applied for sediment routing, and as a two dimensional model (2-D) for flow analysis. This aims to estimate the sediment load deposited in the studied reservoir and   evaluated the effects of pumping rate and flow depth on flow velocity distribution, flow stream power and sediment transport. As this study focuses on the sedimentation problem on the area around the intake’s structure and due to compound flow regime and sediment transport near the intakes and withdraws outlets, a three dimensional (3-D) model is considered more suitable than a 1-D or a 2-D model. The Sediment Simulation in Intakes with Multiblock option (SSIIM) model was considered also in this study; a proper control code for studied case was developed. This model depends on Computational Fluid Dynamics (CDF) techniques as a numerical method to solve fluid motion problems.

The applied models were   calibrated and validated based on measured data of previous studies. The considered statistical criteria indicate that the models’ performances were reasonable for both flow and sediment assessments.  The results of all applied strategies show an improvement with a different percent in the amount of sediment deposited in front and inside of the intake, in comparison with the current situation. The optimal improvement was obtained by adding a control earth dike upstream the station. It is considered the most efficient and practical strategy that can be applied for sustainability of the   pumping station efficiency and lifespan with fewer dredging requirements.

sted, utgiver, år, opplag, sider
Luleå: Luleå tekniska universitet, 2020. s. 70
Serie
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
HSV kategori
Forskningsprogram
Geoteknik
Identifikatorer
urn:nbn:se:ltu:diva-77887 (URN)978-91-7790-544-8 (ISBN)978-91-7790-545-5 (ISBN)
Disputas
2020-04-24, F1031, Universitetsområdet Porsön, 971 87 Luleå, Luleå, 10:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2020-03-02 Laget: 2020-02-27 Sist oppdatert: 2020-03-02bibliografisk kontrollert

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