A hydraulic analysis of shock wave generation mechanism on flat spillway chutes through physical modeling

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Sarwar, Muhammad Kaleem, Tariq, Muhammad Atiq Ur Rehman ORCID: 0000-0002-0226-7310, Farooq, Rashid ORCID: 0000-0002-4763-7645, Abbasi, Hafiz Kamran Jaleel, Haq, Faraz Ul, Ahmad, Ijaz ORCID: 0000-0002-7219-8533, Shah, Muhammad Izhar ORCID: 0000-0002-0588-6301, Ng, A. W. M ORCID: 0000-0002-7698-9068 and Muttil, Nitin ORCID: 0000-0001-7758-8365 (2021) A hydraulic analysis of shock wave generation mechanism on flat spillway chutes through physical modeling. Hydrology, 8 (4). ISSN 2306-5338


Shock waves are generated downstream of spillways during flood operations, which have adverse effects on spillway operations. This paper presents the physical model study of shock waves at the Mohmand Dam Spillway project, Pakistan. In this study, hydraulic analysis of shock waves was carried out to investigate its generation mechanism. Different experiments were performed to analyze the rooster tail on a flat spillway chute and to examine the factors affecting the characteristics of the rooster tail. The study results show that shock wave height is influenced by spillway chute slope, pier shape, and flow depth. Moreover, the height of the shock wave can be minimized by installing a semi-elliptical pier on the tail part of the main pier. Further modifications in the geometry of the extended tail part of the pier are recommended for the elimination of the shock wave. Based on observed data collected from the model study, an empirical equation was developed to estimate the shock wave height generated on the flat slope spillway chutes (5◦ to 10◦ ).

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keywords: Flat chute,Physical modeling,Shock wave,Spillway,Spillway pier

Item type Article
URI https://vuir.vu.edu.au/id/eprint/45053
DOI 10.3390/hydrology8040186
Official URL https://www.mdpi.com/2306-5338/8/4/186
Subjects Current > FOR (2020) Classification > 4005 Civil engineering
Current > Division/Research > Institute for Sustainable Industries and Liveable Cities
Keywords shockwaves, spillway, flood operations, spillway operations, spillway pier
Citations in Scopus 2 - View on Scopus
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