Sediment in Mosul Dam reservoir using the <scp>HEC</scp>‐<scp>RAS</scp> model

Mohammad, Mohammad E.; Al‐Ansari, Nadhir; Issa, Issa E.; Knutsson, Sven

doi:10.1111/lre.12142

Cited by 31 publications

(20 citation statements)

References 6 publications

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“…),, 2014). Onedimensional and 2-D numerical models have been used by few researchers to investigate reservoir sedimentation and flushing (Ahn & Yang, 2010;Gallerano & Cannata, 2011;Ji, Julien, & Park, 2011;Mohammad, Al-Ansari, Issa, & Knutsson, 2016;Tarela & Menéndez, 1999;Zeleke, Moussa, & El-Manadely, 2013). Dutta and Sen (2016) applied the 2-D model, TELEMAC-2D, to predict the bed profiles at different cross sections of Hirakud Reservoir, India.…”

Section: Prediction Of Reservoir Sedimentationmentioning

confidence: 99%

Experimental and numerical simulations of the hydraulic flushing of reservoir sedimentation for planning and design of a hydropower project

Isaac

Eldho

2019

Lakes & Reservoirs

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Hydropower projects located on rivers transporting heavy sediment loads require design and operation criteria based on sediment management as a means of sustaining the project life. Sediment management is achieved by designing projects as a run‐of‐the‐river scheme, with provision for drawdown flushing, noting hydraulic model simulations are essential for optimizing the design of these projects. Sediment deposition levels are generally predicted with long‐term simulations using 1‐D numerical models, as well as experiments with scaled physical models that simulate drawdown flushing. The present study presents experiments with scaled model and 3‐D numerical model simulations conducted for hydraulic flushing of a reservoir. Experiments were conducted for various durations and discharges to finalize the intake alignment and optimize the flushing. The results of the 3‐D numerical model simulations are in agreement with the results of the experimental study (4%–6% variation). The results also indicate a combination of a 1‐D numerical model for sedimentation and a 3‐D numerical model for flushing can be effectively used to simulate the sedimentation and flushing of reservoirs during the planning and design stages.

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Section: Prediction Of Reservoir Sedimentationmentioning

confidence: 99%

Experimental and numerical simulations of the hydraulic flushing of reservoir sedimentation for planning and design of a hydropower project

Isaac

Eldho

2019

Lakes & Reservoirs

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“…Such equations give a good estimate of sediment load for a particular flow condition in the absence of any field measurement and have been used in many similar studies e.g. by Mohammad, Al-Ansari [1], Zeleke, Moussa [21] and Gomez, Cui [22]. Thus, from known values of sediment inflow against river flow, a regime type equation was developed: …”

Section: Construction Of the Numerical Model With Hec-rasmentioning

confidence: 99%

“…Mathematical modeling provides useful knowledge about a river and dams[1] built on it and can able to predict the effect of different external factors on bathymetric changes and reservoir sedimentation. This knowledge assists efficient and sustainable development related to rivers [2].…”

Section: Introductionmentioning

confidence: 99%

Qualitative simulation of bathymetric changes due to reservoir sedimentation: A Japanese case study

Bilal

Dai²,

Larson

et al. 2017

PLoS ONE

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Sediment-dynamics modeling is a useful tool for estimating a dam’s lifespan and its cost–benefit analysis. Collecting real data for sediment-dynamics analysis from conventional field survey methods is both tedious and expensive. Therefore, for most rivers, the historical record of data is either missing or not very detailed. Available data and existing tools have much potential and may be used for qualitative prediction of future bathymetric change trend. This study shows that proxy approaches may be used to increase the spatiotemporal resolution of flow data, and hypothesize the river cross-sections and sediment data. Sediment-dynamics analysis of the reach of the Tenryu River upstream of Sakuma Dam in Japan was performed to predict its future bathymetric changes using a 1D numerical model (HEC-RAS). In this case study, only annually-averaged flow data and the river’s longitudinal bed profile at 5-year intervals were available. Therefore, the other required data, including river cross-section and geometry and sediment inflow grain sizes, had to be hypothesized or assimilated indirectly. The model yielded a good qualitative agreement, with an R2 (coefficient of determination) of 0.8 for the observed and simulated bed profiles. A predictive simulation demonstrated that the useful life of the dam would end after the year 2035 (±5 years), which is in conformity with initial detailed estimates. The study indicates that a sediment-dynamic analysis can be performed even with a limited amount of data. However, such studies may only assess the qualitative trends of sediment dynamics.

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“…Previous studies have applied HEC‐RAS to evaluate the sedimentation process in the Tuttle Creek Reservoir (Shelley et al, ) and the Olmsted Locks in the United States (Ghimire & DeVantier, ), with the results indicating the model is an efficient tool for sediment studies. The HEC‐RAS model as a one‐dimensional (1‐D) model was applied to simulate the flows and evaluate the total sediment deposited in Mosul Dam Reservoir within 25 years of its operation from 1986 to 2011 (Mohammad et al, ). The results indicated the model performance was good for estimating the total load deposited in the reservoir, compared to the bathymetry survey (Issa, Al‐Ansari, & Knutsson, a,b).…”

Section: Introductionmentioning

confidence: 99%

A numerical study of pumping effects on flow velocity distributions in Mosul Dam reservoir using the HEC‐RAS model

et al. 2020

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Water flow direction and velocity affect and controls erosion, transport and deposition of sediment in rivers, reservoirs and different hydraulic structures. One of the main structures affected is pumping stations within the dams wherein the velocity distribution near the station intake is disturbed. The two‐dimensional (2‐D) HEC‐RAS 5.01 model was utilized to study, analyse and evaluate the effects of pumping rates and flow depth on the flow velocity distribution, flow stream power and their effects in the Mosul Dam reservoir. The pumping station was considered as a case study. The station is suffering from sediment accumulation around, and in, its intake and suction pipes. The main inflow sources to the reservoir are the Tigris River and run‐off from the valleys within its basin. The reservoir was divided into two parts for the present study, including the upper part near the pumping station (analysed as a two‐dimensional zone), while the lower part was analysed as a one‐dimensional flow to reduce the simulation period computation time (1986–2011). Different operation plans (i.e. pumping rate and water depth) were considered. The results of the depth‐averaged velocity model indicated that when the pumping station was working at a range from the designed full capacity (100% to 25% of its full capacity), the maximum flow velocity increased from 75 to 4 times the normal velocity when there is no pumping dependent on pumping rate and flow depth. For the same operation plans, the flow stream power varied from around zero values to 400 times at full pumping capacity and low flow depth. For sediment routing along the reservoir, the considered statistical criteria indicated the model performance in estimating the total sediment load deposition and invert bed level is much better than in the case of erosion and deposition areas for different considered bed sections of the reservoir.

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Sediment in Mosul Dam reservoir using the HEC‐RAS model

Cited by 31 publications

References 6 publications

Experimental and numerical simulations of the hydraulic flushing of reservoir sedimentation for planning and design of a hydropower project

Experimental and numerical simulations of the hydraulic flushing of reservoir sedimentation for planning and design of a hydropower project

Qualitative simulation of bathymetric changes due to reservoir sedimentation: A Japanese case study

A numerical study of pumping effects on flow velocity distributions in Mosul Dam reservoir using the HEC‐RAS model

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