Experimental Investigation of the Performance of Inclined Gabion Drop Equipped with a Horizontal Screen

Document Type : Research Paper

Authors

1 Professor , Department of Civil Engineering, Faculty of Engineering, University of Maragheh, Iran.

2 Assistant Professor,, Department of Civil Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran.

3 M.Sc. in Civil Engineering-Hydraulic Structures, Department of Civil Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran

Abstract

One of the important hydraulic issues is to study the effect of additional structures on dissipating the flow energy in overflow structures such as drops. In the present study, using a laboratory model, the effect of simultaneous use of horizontal screen and gabion in the inclined drop structure was investigated and compared with the results of other researchers. The experiments were performed for two heights and three inclined gabion angles, two screen porosity ratios and a flow rate of 150 to 800 liters per minute. The results of all the studied models showed that by increasing the relative critical depth, the relative energy consumption values decrease and the relative downstream depth increases. By increasing angle and height of the slope and decreasing the porosity of the screen for a constant relative critical depth, the relative energy dissipation of the inclined gabion drops equipped with a horizontal screen increases. Increasing the wetted length of horizontal screens causes two-phase flow and air entrance to the used system and consequently the amount of energy dissipation increases. Simultaneous use of gabions in the sloping section and horizontal screens at the edge of the drop has significantly reduced the downstream Froude number so that the downstream Froude number at all three angles and two porosity ratios decreased from range of 4.49-35 to range of 1.31-2.48 compared to the simple inclined slope and from range of 1.48-5.78 to range of 1.31-2.48 as compared to the inclined slope equipped with a horizontal lattice plate.

Keywords


Moradi sabz koohi, A. S.M. Kashefipour, & m. Bina. (2011). Experimental comparison of energy dissipation on drop structures. Journal of water and soil science, 15(56), 209-223. Retrieved from http://jstnar.iut.ac.ir/article-1-1719-fa.html (in Farsi)
Aal, g. M. A., Fahmy m. R., Elnikhely e. A., & el-tohamy E. (2019). Energy dissipation and discharge coefficient over stepped gabion and buttress gabion spillway. Technology, 10(4), 260-267
BalkiƟ, g. (2004). Experimental investigation of energy dissipation through inclined screens. Doctoral dissertation, middle east technical univercity, ankara, turkey
Bos, m. G., replogle j. A., & clemmens a. J. (1984). Flow measuring flumes for open channel systems
Daneshfaraz, R., sadeghfam s., & ghahramanzadeh a. (2017). Three-dimensional numerical investigation of flow through screens as energy dissipators. Canadian journal of civil engineering, 44(10), 850-859
Daneshfaraz, R., majedi asl m., & bazyar a. (2020a). Experimental investigation of the performance of horizontal screen on energy dissipation in inclined drop. Iranian journal of soil and water research, 51(2),441-453. Doi:10.22059/ijswr.2019.288653.668312 (in Farsi)
Daneshfaraz, R., Majedi Asl M., & Bagherzadeh M. (2020b). Experimental investigation of the energy dissipation and the downstream relative depth of pool in the sloped gabion drop and the sloped simple drop. Amirkabir journal of civil engineering, -. Doi:10.22060/ceej.2020.18059.6751(in Farsi)
Daneshfaraz, R., Majedi Asl M., & bagherzadeh m. (2020c). Experimental analysis of behavior the inclined gabion drop in comparison of the standard stilling basins (usbr). Iranian journal of soil and water research, -. Doi:10.22059/ijswr.2020.303078.668625 (in Farsi)
Daneshfaraz, R., Majedi Asl M., Razmi s., norouzi r., & abraham j. (2020d). Experimental investigation of the effect of dual horizontal screens on the hydraulic performance of a vertical drop. International journal of environmental science and technology, 1-10
Daneshfaraz, R., Bagherzadeh, M., Esmaeeli, R., Norouzi, R. and Abraham, J., 2021. Study of the performance of support vector machine for predicting vertical drop hydraulic parameters in the presence of dual horizontal screens. Water Supply21(1), pp.217-231.
Hager, W. H., & bremen r. (1989). Classical hydraulic jump: sequent depths. Journal of hydraulic research, 27(5), 565-585
 Ghaderi, A., Abbasi, S., Abraham, J., & Azamathulla, H. M. (2020a). Efficiency of trapezoidal labyrinth shaped stepped spillways. Flow Measurement and Instrumentation72, 101711.
Ghaderi, A., Daneshfaraz, R., Torabi, M., Abraham, J., & Azamathulla, H. M. (2020b). Experimental investigation on effective scouring parameters downstream from stepped spillways. Water Supply, (In press).
Ghaderi, A., Daneshfaraz, R., Dasineh, M., & Di Francesco, S. (2020c). Energy Dissipation and Hydraulics of Flow over Trapezoidal–Triangular Labyrinth Weirs. Water, 12(7), 1992.
Kabiri-samani, A., Bakhshian E., & Chamani, M. (2017). Flow characteristics of grid drop-type dissipators. Flow measurement and instrumentation, 54, 298-306.
Moradinejad, A., Saneie, M., Ghaderi, A., & Shahri, S. M. Z. (2019). Experimental study of flow pattern and sediment behavior near the intake structures using the spur dike and skimming wall. Applied Water Science9(8), 195.
Nasseri, R., & Kashefipour Dezfouli s. M. (2019). The effect stepped spillway prosity with gabion on weir energy dissipation and characteristics of downstream hydraulic jump. Irrigation sciences and engineering, -. Doi:10.22055/jise.2019.18454.1337 (in Farsi)
Nayebzadeh, B., Lotfollahi-yaghin, M., Daneshfaraz, R. (2019). Experimental study of Energy Dissipation at a Vertical Drop Equipped with Vertical Screen with Gradually Expanding at the Downstream, Amirkabir Journal of Civil Engineering, 52(12), pp. 7-7. doi: 10.22060/ceej.2019.16493.6265
Norouzi Sarkarabad, R., Daneshfaraz R., & Bazyar, A. (2019).The study of energy depreciation due to the use of vertical screen in the downstream of inclined drops by adaptive neuro-fuzzy inference system (anfis). Amirkabir journal of civil engineering, -. Doi:10.22060/ceej.2019.16694.6305 (in Farsi)
Rajaratnam, N., & Hurtig k. (2000) Screen-type energy dissipator for hydraulic structures. Journal of hydraulic engineering, 126(4), 310-312
Sadeghfam, s., daneshfaraz r., khatibi r., & minaei o. (2019). Experimental studies on scour of supercritical flow jets in upstream of screens and modelling scouring dimensions using artificial intelligence to combine multiple models (aimm). Journal of hydroinformatics, 21(5), 893-907
Shaker , j., sarhan s., bshkoj h., & jihan q. (2019). Effect of gravel size and weir height on flow properties of gabions. Journal of university of babylon, 27(2), 214-222
Sholichin, m., & akib s. (2011). Development of drop number performance for estimate hydraulic jump on vertical and sloped drop structure. Int j eng sci, 5(11), 1678-1687
Wagner, W. E. (1956). Hydraulic model studies of the check intake structure-potholes east canal. Bureau of reclamation hydraulic laboratory report hyd, 411
Wüthrich, D., & Chanson H. (2014). Hydraulics, air entrainment, and energy dissipation on a gabion stepped weir. Journal of hydraulic engineering, 140(9), 04014046