Sediment Transport Circulation Pattern through Mesotidal Channels System

Ginsberg, Silvia Susana; Aliotta, Salvador

doi:10.5772/15687

Cited by 3 publications

(2 citation statements)

References 37 publications

(34 reference statements)

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“…The bed load is accumulated when there is low velocity within stream and heavier grain size sediments get settled. Suspended transport load which is due to lighter grain size material kept in suspension with moving water [13]. Sediment transport is studied from a physical point of view for almost two hundred years but it is not yet fully understood [14].…”

Section: Introductionmentioning

confidence: 99%

Sediment Transport Dynamics in the Upper Nara Canal Off-taking from Sukkur Barrage of Indus River

Mahessar¹,

Qureshi²,

Kori³

et al. 2020

Eng. Technol. Appl. Sci. Res.

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Sediment material transported by the Indus River has two origins, the catchment and its wetted perimeter, whereas the amount of materials transported from the river itself depends on variables such as the flow type and the sediment load. The annual sediment load transported in the Indus River ranged from 270 to 600 million tons (MT) before the building of dams and barrages. The average sediment load is 0.715 MT/day or approximately 260 MT/ year after the construction of hydraulic structures. The average particle size, D50, of the bedload is approximately 0.125mm at the Sukkur barrage [1]. In this study, research was conducted to evaluate sediment problems in the Nara Canal, take-off from the left pocket of the Sukkur Barrage on the Indus River. The collected data from the left pocket, the bed, and suspended material in upper Nara and its off-taking canals were analyzed to assess sediment transport dynamics of upper Nara canal at various locations and its off-taking canals. The bed material at RD 553+600 shows a minimum size of 0.07 and a maximum of 0.7mm with 54% fine-sand mixed with 46% medium-sand in 2003. Fine-sand increased to an average of 75% while medium sand diminished to 25% at RD 553+600 in Nara canal and at RD 595+000 in Jamrao complex in 2013. The suspended load with low and high flows during 2012 exhibits that in all the cases the sand proportion was increasing in the Upper Nara canal system flowing to the Jamrao complex. The sediment concentration value indicates that there is the deposition of sand at the upper Nara canal and the Jamrao complex causing a discharge reduction in the Nara Canal system.

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Section: Introductionmentioning

confidence: 99%

Sediment Transport Dynamics in the Upper Nara Canal Off-taking from Sukkur Barrage of Indus River

Mahessar¹,

Qureshi²,

Kori³

et al. 2020

Eng. Technol. Appl. Sci. Res.

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“…The bed load transport is accumulated when there is low velocity with stream heavier grain sizes. While suspended load occur more at higher stream smaller/lighter grain size moves along the bed and are kept in suspension with moving water (Susana, et al, 2011).…”

mentioning

confidence: 99%

Application of Hec-Ras Model to Analyze of Sediment Transport Dynamic Pre and Post Construction of Fall Structures at Lower Nara Canal Off-Taking From Upper Nara Canal, Sukkur Barrage, Indus River, Sindh, Pakistan

Tunio¹

2022

HHH

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This paper presents the research study using the HEC-RAS model to evaluate sediment dynamic problems in lower Nara canal pre and post-construction of fall structures at RD-77 and 101 respectively which is a major tributary of upper Nara canal that off-takes from Sukkur barrage on the left bank of Indus River. As a result, the hydraulic model has computed longitudinal and cross-section, velocity, water surface profiles, and sedimentation dynamics. Sediment transportation without fall structure is aggradation (5.75 ft and degradation (4.50 ft) and with fall structure aggradation (4.25 ft) and degradation (2.75 ft) respectively. Sediment transportation without fall structure is aggradation 500,000 tons and degradation 225,000 tons and with fall structure aggradation 155,000 tons and degradation 125,000 tons. Sediment transportation without fall structure is degradation 600,000 tons and with fall structure is aggradation 110,000 Tons and degradation 165,000 Tons. Sediment transportation without fall structure is aggradation 1,750,000 Tons and with fall structure is aggradation 1,300,000 Tons. Hence the results of the model revealed that aggradation at u/s and degradation at d/s of fall structures that is a true representation of the behavior of fall structures. Whereas, the section is wider than aggradation occurred and degradation is experienced in narrow sections in both scenarios (with and without fall structures). The positive impact of constructed fall structures was analyzed on the morphology of the canal. Hence, the construction of fall structures are essential at the change of country/steeper slope to avoid unnecessary erosion.

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Seismic stratigraphy of late Neogene - Quaternary units and evolutionary model in the inner sector of Bahia Blanca estuary (Argentina)

Fernández

Ginsberg

Aliotta

2020

Journal of South American Earth Sciences

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Sediment Transport Circulation Pattern through Mesotidal Channels System

Cited by 3 publications

References 37 publications

Sediment Transport Dynamics in the Upper Nara Canal Off-taking from Sukkur Barrage of Indus River

Sediment Transport Dynamics in the Upper Nara Canal Off-taking from Sukkur Barrage of Indus River

Application of Hec-Ras Model to Analyze of Sediment Transport Dynamic Pre and Post Construction of Fall Structures at Lower Nara Canal Off-Taking From Upper Nara Canal, Sukkur Barrage, Indus River, Sindh, Pakistan

Seismic stratigraphy of late Neogene - Quaternary units and evolutionary model in the inner sector of Bahia Blanca estuary (Argentina)

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