Bathymetry and siltation rate for Dokan Reservoir, Iraq

Hassan, Rebwar; Al‐Ansari, Nadhir; Ali, Ahsan; Ali, Salahalddin S.; Knutsson, Sven

doi:10.1111/lre.12173

Cited by 18 publications

(16 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of multi‐temporal Lake Naivasha Depth–Area–Volume relationships indicate similar trends to those observed by Hassan et al. () in a multi‐temporal study conducted on Dokan Reservoir, Iraq.…”

Section: Resultssupporting

confidence: 87%

“…From the profiles, it also was observed that gentler slopes exist towards the northern parts of Lake Naivasha (Figure ), which covers the inflow area of the lake. This part could have gentler slope because of sediment deposition taking place in the zone, with a similar observation of the inflow part of the lake having gentler slope also observed by Hassan, Al‐Ansari, Ali, Ali, and Knutsson ().…”

Section: Resultssupporting

confidence: 81%

“…The benefit of analysing the Depth–Area–Volume relationship was demonstrated by Hassan et al. (), who computed the quantity of trapped sediments over a given period by combining the new Depth–Area–Volume relationship with the previous ones on the same figure. Various authors such as Hickley et al.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Bathymetric survey of Lake Naivasha and its satellite Lake Oloiden in Kenya; using acoustic profiling system

et al. 2018

View full text Add to dashboard Cite

Lakes and reservoirs play important roles as freshwater sources for domestic, industrial, agricultural, fisheries and recreational purposes. However, for the lakes to be sustainably exploited, there is need to understand their bathymetric characteristics by conducting bathymetric surveys. This aids in generating information that can guide lakes stakeholders and managers in establishing the volume of available water. It is recommended, therefore, that bathymetric surveys be conducted at ten‐year intervals. Such continuous bathymetric information is lacking in many lakes, especially in developing countries. One example is Lake Naivasha in Kenya, which is largely exploited for various socio‐economic purposes. Despite its importance, its most recent published bathymetric data were collected in 1991. The goal of the present study, therefore, was to conduct a bathymetric survey of Lake Naivasha and its satellite Lake Oloiden, using an Acoustic Profiling System (APS) to generate Depth–Area–Volume relationships for the lakes. The survey results indicate the in the year 2016 mean depth, volume and surface area of the lake were 4.68 m, 722 × 106 m3 and 154.17 × 106 m2, respectively. Because of limited information from the 1991 survey, the 2016 survey results were comparable with those of 1983. The difference in the lakes mean, and maximum depth for the 1983 and 2016 survey was less by 0.23 and 2 m, respectively. This could be an indicator the lake is being affected by anthropogenic activities or environmental changes. The established Depth–Area–Volume relationships are crucial since they provide invaluable information to lake and water resources managers for making informed decisions regarding management of the lake's water resources.

show abstract

Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 81%

See 1 more Smart Citation

Bathymetric survey of Lake Naivasha and its satellite Lake Oloiden in Kenya; using acoustic profiling system

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The model is applied for the study period to estimate the runoff and sediment load reaching the Dokan Reservoir. The considered years of simulation have begun since the operation of the dam in 1959 to the year of the bathometry survey (2014) carried out by [39]. The resultant annual runoff volume that enters the Dukan Reservoir from the HRUs ranges from 300 to 4600 MCM (Figure 7), depending on rainfall intensity, depth and distribution through the rainy season.…”

Section: Resultsmentioning

confidence: 99%

Watershed Sediment and Its Effect on Storage Capacity: Case Study of Dokan Dam Reservoir

Ezz-Aldeen

Hassan

Ali

et al. 2018

Water

Self Cite

View full text Add to dashboard Cite

Dokan is a multipurpose dam located on the Lesser Zab River in the Iraq/Kurdistan region. The dam has operated since 1959, and it drains an area of 11,690 km 2 . All reservoirs in the world suffer from sediment deposition. It is one of the main problems for reservoir life sustainability. Sustainable reservoir sediment-management practices enable the reservoir to function for a longer period of time by reducing reservoir sedimentation. This study aims to assess the annual runoff and sediment loads of the Dokan Dam watershed using the soil and water assessment tool (SWAT) model to evaluate the relative contributions in comparison with the total values delivered from both watershed and Lesser Zab River and to identify the basins with a high sediment load per unit area. These help in the process of developing a plan and strategy to manage sediment inflow and deposition. The SUFI-2 program was applied for a model calibrated based on the available field measurements of the adjacent Derbendekhan Dam watershed, which has similar geological formations, characteristics and weather. For the calibration period (1961)(1962)(1963)(1964)(1965)(1966)(1967)(1968), the considered statistical criteria of determination coefficients and Nash-Sutcliffe model efficiency were 0.75 and 0.64 for runoff while the coefficients were 0.65 and 0.63 for sediment load, respectively. The regionalization technique for parameter transformation from Derbendekhan to Dokan watershed was applied. Furthermore, the model was validated based on transformed parameters and the available observed flow at the Dokan watershed for the period (1961)(1962)(1963)(1964); they gave reasonable results for the determination coefficients and Nash-Sutcliffe model efficiency, which were 0.68 and 0.64, respectively. The results of SWAT project simulation for Dokan watershed for the period indicated that the average annual runoff volume which entered the reservoir was about 2100 million cubic meters (MCM). The total sediment delivered to the reservoir was about 72 MCM over the 56 years of dam life, which is equivalent to 10% of the reservoir dead storage. Two regression formulas were presented to correlate the annual runoff volume and sediment load with annual rain depth for the studied area. In addition, a spatial distribution of average annual sediment load was constructed to identify the sub basin of the high contribution of sediment load.

show abstract

“…The exposed formations date back to the lower Jurassic. Most of the formations are composed of limestones up to the lower Miocene formations (Fatha, Injana, Mukdadia, and Bi Hassan formations; Hassan, Al‐Ansari, Ali, Ali, & Knutsson, ). These formations are composed of limestones, gypsum, sandstones, conglomerates, and marl (Sissakian et al, ).…”

Section: Methodsmentioning

confidence: 99%

Sediment flux from Lesser Zab River in Dokan Reservoir: Implications for the sustainability of long‐term water resources in Iraq

Ali

Hassan

Dawood

et al. 2020

River Research & Apps

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Bathymetry and siltation rate for Dokan Reservoir, Iraq

Cited by 18 publications

References 5 publications

Bathymetric survey of Lake Naivasha and its satellite Lake Oloiden in Kenya; using acoustic profiling system

Bathymetric survey of Lake Naivasha and its satellite Lake Oloiden in Kenya; using acoustic profiling system

Watershed Sediment and Its Effect on Storage Capacity: Case Study of Dokan Dam Reservoir

Sediment flux from Lesser Zab River in Dokan Reservoir: Implications for the sustainability of long‐term water resources in Iraq

Contact Info

Product

Resources

About