Impact of Bed Material on the Local Scour Downstream Fayoum Type Weir with Various Designs of Floor Jets
DOI:
https://doi.org/10.24203/ajet.v8i1.6062Keywords:
Hydraulic Structures, Weirs, Stilling Basin, Floor Jets, Bed Material, ScourAbstract
Local scour downstream hydraulic structures should be studied well to avoid damage or even failure of these structures. In this paper, an experimental model was conducted to study the influence of bed material size on the local scour downstream stilling basins of Fayoum type weir as a hydraulic structure. Two bed material were tested. The model included stilling basin and five rows of water jets. Forty-five test runs were carried out for each bed material. Different cases were implemented during this study including three flow discharges, three tail water depths and five various designs of floor jets. Based on the obtained results, it was found that the maximum and minimum scour depths for the two bed materials occurred by design A and design D. The maximum scour lengths happened for medium sand by design C and for fine gravel by both designs A and E, while the minimum scour lengths were recorded for medium sand by design D and for fine gravel by design A. The maximum scour volumes were found for the two bed materials by design A, while the minimum scour volumes occurred by both designs C and D for medium sand and by design E for fine gravel. Employing fine gravel instead of medium sand as a bed material achieved maximum reduction percentages of 86.8 %, 53.3 % and 89.8 % for scour depth, scour length and scour volume, respectively.
References
Edward AE. (1959): “Hydraulic energy dissipatorsâ€. New York, Toronto, London: Mc-Graw Hill Book Co., Inc.
Peterka AJ. (1978): “Hydraulic design of stilling basin and energy dissipatorsâ€. Washington, DC: U.S. Dept. of the Interior Bureau of Reclamation.
Yasser A. Moussa, Abdel-Azim M. Ali and Yasser K. Saleh (2018): “Performance of sills over aprons under the effect of submerged hydraulic jump, (case study: Naga Hammadi Barrage)â€, Ain Shams Engineering Journal, Vol. 9, Issue 4, Dec., pp. 1365-1374.
Ahmed Mostafa Ahmed Amin (2015): “Physical model study for mitigating local scour downstream of clear over-fall weirsâ€, Ain Shams Engineering Journal, vol. 6, issue 4, Dec., pp. 1143-1150.
Akhmad Adi Sulianto and Keisuke Murakami (2015): “Study on Local Scouring of Gravel Mound due to Tsunami Overflowâ€, Procedia Engineering, vol. 116, pp. 195-202.
Xiao-xie LIU and Yee-Meng CHIEW (2014): “Effect of upward seepage on bedload transport rateâ€, Journal of Water Science and Engineering, Vol. 7, Issue 2, April, pp. 208-217.
Esam El-Deen Yousry El-Azab Helal (2014): “Minimizing scour downstream of hydraulic structures using single line of floor water jetsâ€, Ain Shams Engineering Journal, Vol. 5, Issue1, Mar., pp. 17-28.
Hossam Mohamed Ali Ahmed, Mohamed El Gendy, Ahmed Mohamed Hassan Mirdan, Abdel Azim Mohamed Ali and Fahmy Salah Fahmy Abdel Haleem (2014): “Effect of corrugated beds on characteristics of submerged hydraulic jumpâ€, Ain Shams Engineering Journal, Vol. 5, Issue4, Dec., pp. 1033-1042.
Sayed Mojtaba Razavi Nabavi and Mahmood Shafai Bejestan (2013): “Effects of Upward Seepage on Depth of Scour Hole Downstream of Free-Falling Jets Under Constant Tail Water Depthâ€, Journal of Water Sciences Research, Spring 2013, Vol. 5, Issue 1, pp. 31-39.
S.M.R. Nabavit and M. Shafai Bejestan (2012): “Bed upward seepage effects on scour dimensions downstream of free-falling jetsâ€, Ecology, Environment and Conservation, Vol. 18, Issue 1, Jan., pp. 183-186.
M. Ghodsian, M. Mehraein and H.R. Ranjbar (2012): “Local scour due to free fall jets in non-uniform sedimentâ€, Scientia Iranica, Vol. 19, Issue 6, Dec., pp. 1437-1444.
H. Hamidifar, M.H. Omid and M. Nasrabadi (2011): “Scour Downstream of a Rough Rigid Apronâ€, World Applied Sciences Journal, Vol. 14, Issue 8, pp. 1169-1178.
Abdelazim M. Ali and Yasser A. Mohamed (2010): “Effect of stilling basin shape on the hydraulic characteristics of the flow downstream radial gatesâ€, Alexandria Engineering Journal, Vol. 49, Issue 4, Dec., pp. 393-400.
Subhasish Dey and Arindam Sarkar (2006): “Scour Downstream of an Apron Due to Submerged Horizontal Jetsâ€, Journal of Hydraulic Engineering, Vol.132, Issue 3, Mar., pp. 246-257.
Samir Ali Ead and N. Rajaratnam (1998): “Double-Leaf Gate for Energy Dissipation Below Regulatorsâ€, Journal of Hydraulic Engineering, Vol.124, Issue 11, Nov., pp. 1134-1145.
S. S. Chatterjee, S. N. Ghosh, and M. Chatterjee (1994): “Local Scour due to Submerged Horizontal Jetâ€, Journal of Hydraulic Research, Vol. 45, Issue 3, pp. 357-364.
Ali Uyumaz (1988): “Scour Downstream of Vertical Gateâ€, Journal of Hydraulic Research, Vol. 114, Issue 7, pp. 811-816.
Javad Farhoudi and Kenneth V. H. Smith (1985): “Local scour profiles downstream of hydraulic jumpâ€, Journal of Hydraulic Research, Vol. 23, Issue 4, pp. 343-358.
Trishan B. (2020): “Basis of Soil Classification†http://www.soilmanagementindia.com/soil/soil-classification/basis-of-soil-classification/13460, Visited on: 4/1/2020.
Downloads
Published
Issue
Section
License
- Papers must be submitted on the understanding that they have not been published elsewhere (except in the form of an abstract or as part of a published lecture, review, or thesis) and are not currently under consideration by another journal published by any other publisher.
- It is also the authors responsibility to ensure that the articles emanating from a particular source are submitted with the necessary approval.
- The authors warrant that the paper is original and that he/she is the author of the paper, except for material that is clearly identified as to its original source, with permission notices from the copyright owners where required.
- The authors ensure that all the references carefully and they are accurate in the text as well as in the list of references (and vice versa).
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Attribution-NonCommercial 4.0 International that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
- The journal/publisher is not responsible for subsequent uses of the work. It is the author's responsibility to bring an infringement action if so desired by the author.
