Evaluation of Seepage and Stability  of Duhok Dam

Noori, Bahzad M. A.; Ismaeel, Khaleel S.

doi:10.33899/rengj.2011.27885

Cited by 9 publications

(4 citation statements)

References 12 publications

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“…SEEP2D has previously been verified by Ismaeel & Noori (2011) using experimental and field data, and Refaiy et al (2021) using experimental data, and shown to be reliable and offer acceptable accuracy in modeling earth dams.…”

Section: Seep2dmentioning

confidence: 83%

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Effects of core characteristics on seepage through earth dams

Abdel-Kawy

AboulAtta

El-Molla

2021

Water Practice and Technology

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In this research, SEEP2D and SEEP/W numerical models are used to simulate seepage through earth dams with internal cores. In order to evaluate the two models' performance, they were compared in cases with no, vertical, and wedge-shaped cores. SEEP/W was then used to study further cases due to its accuracy in drawing the phreatic line within the core zone. The effect of the core's characteristics on the amount of discharge, and the phreatic line's levels at the core's upstream and downstream faces were investigated. Four core types – vertical, wedge-shaped, upstream inclined, and downstream inclined – were considered. Different hydraulic conductivities, upper widths, and core slopes were also evaluated. The wedge-shaped core is the most effective of those investigated in reducing seepage discharge and the phreatic line's level at the core's downstream face, the vertical core came second. Design equations are provided for all the core shapes considered in the study.

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Section: Seep2dmentioning

confidence: 83%

“…Numerous studies have considered the problem of earth dams with cores, many being case studies of specific dams and sites. Ismaeel & Noori (2011) studied Duhok zoned earth dam using SEEP2D. The model's accuracy was tested using experimental and field data, and the results showed that it was acceptable.…”

Section: Introductionmentioning

confidence: 99%

Effects of core characteristics on seepage through earth dams

Abdel-Kawy

AboulAtta

El-Molla

2021

Water Practice and Technology

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“…Dams are constructed for various purposes such as for irrigation, hydropower generation, flood controlling, fishing, recreation and many others. Before the construction of any dam projects, detail investigation the stability of upstream and downstream slopes, abutment slopes, accurate assessment of seepage potential and determination of hydraulic gradients in various parts of the dam must be carried out to prevent dam failures (Ismaeel and Noori 2011). Proper analysis of seepage and slope stability is very crucial for determining the stabilization and strength of the dam structure (Li and Liu 2010).…”

Section: Introductionmentioning

confidence: 99%

Application of limit equilibrium and shear strength reduction techniques for stability assessment of upstream and downstream slope cuts- A case study ofKhalid-Dijo dam project, Southern Ethiopia

Wendim

2024

Preprint

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Dam failure can occur due to various reasons like structural instability, downstream and upstream slopes instability. The downstream and upstream slope cuts of Khalid-Dijo irrigation dam project has assessed by integrating both limit equilibrium and finite element methods. In this research, limit equilibrium methods such as Morgenstern-Price, Spencer and Janbu corrected methods were utilized. Because those methods are satisfies both force and moment equilibriums. In addition, numerical finite element shear strength reduction method was utilized to compare the analysis results with limit equilibrium methods and validate the analysis. Slide v 6.0 software packages were utilized for limit equilibrium analysis and a phase2 v 8.0 was utilized for finite element analysis. In both methods the analysis was carried out at four anticipated natural conditions (i.e., static dry, static saturated, dynamic dry and dynamic saturated conditions). Slope material (i.e. soil and rock) properties are measured from in situ, laboratory tests and used as input parameters for the analysis to obtain factor of safety and critical strength reduction factor. Those are unit weight, cohesion, angle of internal friction, poison’s ratio, dilation angle and young’s modulus. Thus, the analysis shows that the factor of safety values for limit equilibrium methods and the critical strength reduction factor for finite element method are very close each other for the three slope cuts at all anticipated conditions. The lowest factor of safety and critical strength reduction factor is 1.56 and 2.14 respectively. Thus, it can be concluded that Khalid-Dijo irrigation dam project is safe against upstream and downstream slope cuts failure. The study suggested that the average safety factor values of both methods should be used during the design stage to minimize the risk.

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“…The finite element method was used as a numerical solution in different studies using computer programs. (Noori and Ismaeel, 2011) [2] examined the seepage of the Duhok dam by using a (SEEP/2D) computer program. The quantity of seepage through the dam, the pore water pressure distribution, the total head measurements and the effect of anisotropy of the core materials (the ratio of the permeability in the horizontal direction to that in the vertical direction (Kx/Ky)) were examined.…”

Section: Introductionmentioning

confidence: 99%

Seepage Simulation of the Proposed Makhool Dam in North Iraq

Hameed

Abdullah

Irzooki

2023

Iraqi Journal of Science

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This study aims to simulate water seepage and identify areas of weakness in the foundations through the right and left sides of the proposed Makhool dam in northern Iraq, using the finite element method by advanced computer software (SEEP/ W, 2012). The earth fill dam is 3670 m long on the Tigris River. Many attempts were made to ascertain the program results on the supposed earth dam and compare the results with those of other analytical methods to verify the program. The results are comparable, showing that the program is suitable for use in the seepage analysis at the proposed Makhool dam. According to the seepage analysis, the quantity of seepage through the left side of Makhool is acceptable within permissible limits; however, the right side has a lot more than the left side because of the presence of cracks, fractures, and cavitations in the stratigraphic sequence of Fatha formation at great depths in the gypsum beds under the diaphragm. The results indicate the need to lower the diaphragm about 6 m extra in the foundation's zone to a level of 49 m.a.s.l until reaching the low permeability clay bed within the foundations' zone. This action will reduce the amount of seepage and flow velocity and avoid using more grouting during the dam life. The design limits of the piezometric head (total head) were also determined, which are supposed to be read by the monitoring devices when operating the dam at the maximum level of the reservoir and the normal operating levels.

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Evaluation of Seepage and Stability of Duhok Dam

Cited by 9 publications

References 12 publications

Effects of core characteristics on seepage through earth dams

Effects of core characteristics on seepage through earth dams

Application of limit equilibrium and shear strength reduction techniques for stability assessment of upstream and downstream slope cuts- A case study ofKhalid-Dijo dam project, Southern Ethiopia

Seepage Simulation of the Proposed Makhool Dam in North Iraq

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