Reservoir Sedimentation. I: Delta and Density Current Deposits

Jia-hua, Fan; Morris, Gregory L.

doi:10.1061/(asce)0733-9429(1992)118:3(354)

Cited by 117 publications

(64 citation statements)

References 3 publications

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“…The reservoir was surveyed in 1976(DEMAS, 1985), 1992(Gismalla, 1993), 2007(Abd Alla and Elnoor, 2007 and 2009 (Omer, 2011). The bathymetric surveys prior to 2009 do not cover the upstream river reach up to El Deim station, nor the left and right wings of the reservoir (Fig.…”

Section: Reservoir Sedimentation From Bathymetric Datamentioning

confidence: 99%

“…Both the morphological factor and the poor resolution were inevitable, though, given the long simulation times (each computation had a duration of weeks) and the data available for the study. Underestimation of flow velocity results in higher sedimentation rates and in sand being deposited in the upstream part of the reservoir (delta formation: Fan and Morris, 1992;Kostic and Parker, 2003a, b).…”

Section: Model Verification Based On Soil Stratification Datamentioning

confidence: 99%

“…Sedimentation processes in reservoirs have been addressed by many authors, e.g. Duquennois (1956), Borland (1971), Bowonder et al (1985), Mohmood (1987), Annandale (1987), Hotchkiss and Parker (1991), Fan and Morris (1992), Sloff (1997) and…”

Section: Introductionmentioning

confidence: 99%

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Modelling of sedimentation processes inside Roseires Reservoir (Sudan)

et al. 2015

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Abstract. Roseires Reservoir, located on the Blue Nile River in Sudan, is the first trap to the sediments coming from the vast upper river catchment in Ethiopia, which suffers from high erosion and desertification problems. The reservoir has already lost more than one-third of its storage capacity due to sedimentation in the last four decades. Appropriate management of the eroded soils in the upper basin could mitigate this problem. In order to do that, the areas providing the highest sediment volumes to the river have to be identified, since they should have priority with respect to the application of erosion control practices. This requires studying the sedimentation record inside Roseires Reservoir in order to assess when and how much sediment is deposited and to identify its source. This paper deals with the identification of deposition time and soil stratification inside the reservoir, based on historical bathymetric data, numerical modelling and newly acquired soil data. The remoteness of the study area and the extreme climate result in coring campaigns being expensive and difficult. Therefore, these activities need to be optimised and coring locations selected beforehand. This was done by combining bathymetric data and the results of a depth-averaged morphodynamic model recording the vertical stratification in sediment deposits. The model allowed for recognising the areas that are potentially subject to neither net erosion nor bar migration during the lifespan of the reservoir. Verification of these results was carried out by analysing sediment stratification from the data collected during the subsequent field campaign.

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Section: Reservoir Sedimentation From Bathymetric Datamentioning

confidence: 99%

Section: Model Verification Based On Soil Stratification Datamentioning

confidence: 99%

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Modelling of sedimentation processes inside Roseires Reservoir (Sudan)

et al. 2015

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“…General transverse structures like weir (triangular or rectangular) have a significant function in maintaining the upstream depth of water and securing water resources for optimum use (Kabiri-Samani and Javaheri 2012;Nayan Sharma 2007;Nayan Sharma 2013;Payne et al 2004). However, it destabilizes sediment continuity, because flow velocity is reduced due to the increased water depth (Bai and Duan 2014;Fan and Morris 1992). Due to the restricting nature of sediment downstream, it is deposited directly upstream of a weir (Kim et al 2014;Kondolf et al 2014).…”

Section: Piano Key Weir (Pkw)mentioning

confidence: 99%

Turbulence study in the vicinity of piano key weir: relevance, instrumentation, parameters and methods

Tiwari

Sharma

2015

Appl Water Sci

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This research paper focuses on the need of turbulence, instruments reliable to capture turbulence, different turbulence parameters and some advance methodology which can decompose various turbulence structures at different levels near hydraulic structures. Small-scale turbulence research has valid prospects in open channel flow. The relevance of the study is amplified as we introduce any hydraulic structure in the channel which disturbs the natural flow and creates discontinuity. To recover this discontinuity, the piano key weir (PKW) might be used with sloped keys. Constraints of empirical results in the vicinity of PKW necessitate extensive laboratory experiments with fair and reliable instrumentation techniques. Acoustic Doppler velocimeter was established to be best suited within range of some limitations using principal component analysis. Wavelet analysis is proposed to decompose the underlying turbulence structure in a better way.

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“…Reduction in storage capacity has impacts on the function of the reservoir's purpose and results in notable costs to the regional economy. Accurate prediction of sedimentation is required for better design and operation of reservoirs (Graf 1984, Fan andMorris 1992).…”

mentioning

confidence: 99%

Using numerical models and acoustic methods to predict reservoir sedimentation

Elçi

Bor

Çalışkan

2009

Lake and Reservoir Management

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This study draws on drainage basin hydrography, numerical modeling and geographic information system (GIS) techniques in concert with dual frequency echo sounder data to estimate sediment thickness when initial surveys are unavailable or inaccurate. Tahtali Reservoir (Turkey), which provides 40% of water supply to the city of Izmir, was selected as the study site. Deposition patterns within the whole lake were estimated with a 3-D hydrodynamic and sediment transport model applied to Tahtali Reservoir. The numerical model simulated lake response to wind forcing and inflows and/or outflows and was used to describe sediment deposition patterns resulting from the erosion of soils quantified by the implementation of Universal Soil Loss Equation (USLE) to the whole watershed. Surveying of the lake via dual frequency (28/200 kHz) echo sounder system revealed the current bathymetry, and sediment thickness was estimated from the difference of depths measured by the dual frequency sounder along surveyed transects. These results were compared to the modeled sedimentation thicknesses and to preliminary estimates of watershed sediment yield estimated by USLE. Results of this study can be used for further water quality studies and for long term management plans.TÜBİTAK project No: 104Y323 and European Commission project No: 28292 (RESTRAT

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Reservoir Sedimentation. I: Delta and Density Current Deposits

Cited by 117 publications

References 3 publications

Modelling of sedimentation processes inside Roseires Reservoir (Sudan)

Modelling of sedimentation processes inside Roseires Reservoir (Sudan)

Turbulence study in the vicinity of piano key weir: relevance, instrumentation, parameters and methods

Using numerical models and acoustic methods to predict reservoir sedimentation

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