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Open AccessArticle

Effect of Submergence and Apron Length on Spillway Scour: Case Study

Department of Civil and Environmental Engineering, West Virginia University, Morgantown, WV 26506, USA
Department of Civil and Mechanical Engineering, United States Military Academy, West Point, NY 10996, USA
Department of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
Korea Institute of Civil Engineering and Building Technology, Goyang 411-712, Korea
South Florida Water Management District, West Palm Beach, FL 33406, USA
Author to whom correspondence should be addressed.
Academic Editors: Thorsten Stoesser and Roger A. Falconer
Water 2015, 7(10), 5378-5395;
Received: 31 July 2015 / Revised: 8 September 2015 / Accepted: 30 September 2015 / Published: 12 October 2015
(This article belongs to the Special Issue Recent Advances in Riverflow Research)
Large-scale water resources systems are often managed by an integrated set of hydraulic structures that are vulnerable to wider ranges of discharge and tailwater elevation than envisioned in their original design due to climate change and additional project objectives such as fostering healthy ecosystems. The present physical model study explored the performance of a spillway structure on the Kissimmee River, operated by the South Florida Water Management District, under extreme conditions of drought and flooding with accompanying low and high tailwater levels for both gate-controlled and uncontrolled spillway flow conditions. Maximum scour depths and their locations for two different riprap apron lengths downstream of the spillway stilling basin were measured along with the complex flow fields prior to scour. Effects of tailwater submergence, type of spillway flow and riprap apron length on scour results are interpreted in terms of the measured turbulent kinetic energy and velocity distributions near the bed. View Full-Text
Keywords: apron; riprap; scour; spillway; turbulence; velocity apron; riprap; scour; spillway; turbulence; velocity
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Hong, S.; Biering, C.; Sturm, T.W.; Yoon, K.S.; Gonzalez-Castro, J.A. Effect of Submergence and Apron Length on Spillway Scour: Case Study. Water 2015, 7, 5378-5395.

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