The Effect of Bridge Piers on Local Scouring at Alue Buloh Bridge Nagan Raya Regency

Cut Suciatina Silvia(1*), Muhammad Ikhsan(2), Azwanda Azwanda(3)

(1) University of Teuku Umar
(2) University of Teuku Umar
(3) University of Teuku Umar
(*) Corresponding Author


Scouring that occurs in cross-section a river can be caused by morphological conditions of the river and the effect of bridge piers that obstruct the flow. Availability of piers and abutments can cause the stability of soil base granules to be disrupted, downflow, and horseshoe vortex that causes soil base granules around the bridge pier to be transported the flow that causes occurrence in local scouring. The problems of local scours also occurred in Krueng Ineng river, Alue Buloh Village, Nagan Raya Regency. The problem that is often encountered due to bridges being built across rivers is the lack of functioning of the under-bridge structures. Local scours on the bridge piers will cause a structural collapse which has the impact of decreasing the stability of the bridge structure currently. In this study, local scour analysis are using empirical equations with the Froehlich, Lacey and Colorado State University Method. The Results of the analysis with used the peak discharge (Qp100) that occurs in the Krueng Seunagan watershed is 1513m3/sec. Analysis with a flow depth of 3.06m, Froude number 0.29, pier width with lenticular shaped 4m, and D50, D95 (average grain size analysis ) 0.91mm and 4.35mm, show a maximum scour depth at the field of 1.65m and 1.68m occurs in point (station) 2 and 3 on segment 5. Analysis with the Froehlich, Lacey Method and the CSU Method shows a scour depth is 1.68m, 4,47m (Qp100) and 2.43m. The closest measurement result in the field is the Froehlich Method. With this result, it might be input for local governments to plan appropriate handling for minimizing local scour in this study area


Local Scour; Scour Depth; Lacey Method; Froehlich Method; CSU Method.

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Administration, Federal Highway, 2012. Evaluating Scour at Bridges (HEC-18), 5th Edition. no. 18: 1–340.

Ahmad, Nordila, Mohammad, T. A, and Zuliziana Suif., 2017. Prediction of Local Scour around Wide Bridge Piers under Clear-Water Conditions. International Journal of GEOMATE, 12 (34), pp. 135–39.

Akan, Osman., 2006. Open Channel Hydraulics. Canada: Butterworth-Heinemann.

Breusers, HNC, and AJ Raudkivi, 1991. Scouring, Hydraulic Structures Design Manual. Rotterdam : AA Balkema.

Farooq, Rashid, and Ghumman, A.R., 2019. Impact Assessment of Pier Shape and Modifications on Scouring around Bridge Pier. Water, 11, pp. 1–21.

Froehlich, David C.,  2013.  Protecting Bridge Piers with Loose Rock Riprap. Journal of Applied Water Engineering and Research, 1(1), pp 39–57.

Garde, R, J, and C Kothyari, U., 1998. Scour Around Bridge Piers. Proceedings of the Indian National Science Academy.

Melville, Bruce., 2008. The Physics of Local Scour at Bridge Piers.  Proceedings of the 4th International Conference on Scour and Erosion,  (1), pp. 28–40.

Piers, Bridge, I., Akib, S., and Rahman, S., 2013. Time Development of Local Scour around Semi. World Academy of Science, Engineering and Technology International Journal of Civil and Environmental Engineering, 7 (7), pp. 2221–26.

Purwantoro, Didik., 2015. Model Pengendalian Gerusan Di Sekitar Abutmen Dengan Pemasangan Groundsill Dan Abutmen Bersayap. Inersia, 11 (1), PP. 79–89.

 Rahman, MM, and MA Haque., 2003. Local Scour Estimation at Bridge Site: Modification and Application of Lacey Formula. International Journal of Sediment Research, 18 (4), pp.  333–39.

Rizaldi, Akbar, Farid, M., Moe, I.R., and Kendra, H., 2020. Study on Flow Regime Change Due to Weir Construction Plan in Batang Asai River, Sarolangun, Province of Jambi. IOP Conference Series: Earth and Environmental Science, 437 (1).

Roy, Chandan., 2017. Effect of Bridge Pier Geometry on Local Scouring. International Journal of Earth Sciences and Engineering, 10 (02), pp. 374–77.

Rustiati, Bariroh, N., 2007. Gerusan Lokal Disekitar Abutment Jembatan Labuan. SMARTek 5, (3), pp. 157–65.

Yuliansyah, I, Aprizal, and A Nurhasanah. 2017. Comparative Analysis of Flood Hydrograph Way Kandis River Basin with Synthetic Units Hydrograph (HSS) Snyder, Nakayasu, and Limantara Methods. The 4th International Conference on Engineering and Technology Development (ICETD, no. Icetd: 60–69.


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