Effect of Floating Bridges on Open Channels’ Flow and Bed Morphology

Helal, Esam; Sobeih, M. F.; Eldin, Mohamed E. Nour

doi:10.1061/(asce)ir.1943-4774.0001331

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…The available literature demonstrates that there is a need for a tool capable of predicting the morphological response to a multitude of interventions (Helal, 2019; Helal, Sobeih, & Ezz El‐din, 2018), diagnosing historical trends in navigation channel dimensions, and forecasting future trends.…”

Section: Methodsmentioning

confidence: 99%

Sustainability of a navigation channel in the Nile River: A case study in Egypt

Helal

Elsersawy

Hamed

et al. 2020

River Research & Apps

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Inland waterways are an environmentally friendly and efficient mode of transport. At locations along the Nile River, Egypt, navigation is hindered requiring expensive, resource‐intensive corrective. An increasing number of navigational bottlenecks have occurred between 1982 and 2015 because of changing river channel morphologies. This study provides a suitable method for evaluating navigation conditions within a reach of the Nile River. A 2D morphological model combined with a geographic information system application was created to assess the navigability of a reach of the Nile River, and different maintenance strategies were evaluated. Different scenarios of varying water levels, dredging operations, flow discharge fluctuations, and river channel morphological changes were considered. Results reveal that dredging operations, alone, cannot be adopted as a permanent solution for navigation bottlenecks, with the riverbed returning to its original state within 10 years. An important output of the method is the generation of reach scale hydro‐morphodynamic maps that show the main morphological features, navigation bottlenecks, and navigation conditions. These maps aid in the development of strategic navigability plans and in evaluating long‐term improvement measures. The method presented is applicability to large river systems worldwide.

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Section: Methodsmentioning

confidence: 99%

Sustainability of a navigation channel in the Nile River: A case study in Egypt

Helal

Elsersawy

Hamed

et al. 2020

River Research & Apps

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“…Firstly, the flume results validation has been done by comparing the current experimental results with that concluded by previous studies displayed in the review section. The outcomes by HELAL et al [2018], FREDERIKSEN et al [2019, ABOZAID et al [2016], andPETERSEN et al [2019] are used for this purpose. The comparative results are presented in Figure 4.…”

Section: Model Validationmentioning

confidence: 99%

“…Moreover, NEW-MAN [1977] indicated the importance of studying hydrodynamics, as it provided general information on hydrodynamics, describe water waves as they interact with the installed structures, treated various problems of fluid movement, described wave motion and dealt with various hydrodynamic problems. HELAL et al [2018] carried out two hundred and twenty nine experimental runs to study the bed morphology in an open channel due to presence of a floating bridge. They also investigated the energy head loss on a static floating bridge with constant and variable submergence ratios.…”

Section: Introductionmentioning

confidence: 99%

Journal of Water and Land Development

Ibrahim,

Eltoukhy,

Ghanim

2021

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A pontoon bridge, also known as a floating bridge, can be used as for pedestrian and vehicle traffic. The buoyancy of the floating bridge limits the maximum load it can carry. This research included experimental runs to study variations of open channel flow characteristics upstream and downstream a floating bridge. Eighty one runs have been carried out using a flume in a hydraulic laboratory. The experimental run program is classified into two main categories; the first investigates the velocity ratios (vds/vus) downstream and upstream the floating bridge. The second category is concerned with the energy head losses (hL) due to the presence of a floating bridge. The experimental runs are carried out using three pontoon lengths, three flow depths, six submerged depths, and three discharges. The results are analysed and graphically presented to help predict hydraulic parameters. The outcomes have shown that the floating bridge upstream, Froude number and submergence of the pontoon are the dominant parameters that affect the studied flow characteristics.

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