Prediction of the Local Blockage Influence on Culvert Outlets Scouring Pattern

Mohamed Ahmed Reda Hamed1, *
1 Civil Engineering Department, Canadian International College (CIC), El Sheikh Zayed, Giza, Egypt.



Culverts, one of the most popular crossing hydraulic structures, are mainly constructed to facilitate the waterway flowing below their roads or railways’ intersecting locations. However, their functional operation usually led to water flow passage limitation and therefore blockage occurs due to the accumulation of debris at their inlets. Consequently, this blockage can cause culvert bed scouring and failure.


In this context, this study involved determining the culvert scouring pattern. Therefore, a distinctive laboratory experimental program in both non-blocked and partially blocked conditions was implemented to investigate the dominant parameters that affect the culvert’s scour depth formation.


The study proved that the culvert governing geometry, flow condition, and blockage percent are mainly considered the dominant parameters in studying and estimating the scouring at the outlet of the culverts. In addition, a new proposed design formula for defining the local scour depth has been developed.


The proposed formula for scour depth determination was statistically compared with the previously developed models and it was showing a successful agreement with them.

Keywords: Blockage, Culverts, Experimental Program, Hydraulic Structures, Scouring Depth, Water Supply.

Abstract Information

Identifiers and Pagination:

Year: 2023
Volume: 17
DOI: 10.2174/18741495-v17-e230111-2022-64

Article History:

Electronic publication date: 11/01/2023
Collection year: 2023

© 2023 Mohamed Ahmed Reda Hamed.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Civil Engineering Department, Canadian International College (CIC), El Sheikh Zayed, Giza, Egypt; Tel:+201118905720; POB:11454; Email: