Energy Dissipation on Block Ramps with Staggered Boulders
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Abstract
Block ramps are a short length of a steep channel armored with rocks, which produce high dissipation of energy. This technical note presents the results of experiments performed on a ramp having a staggered arrangement of hemispherical boulders with base material on its bed. Compared to row and random arrangements of boulders, a staggered arrangement produces more dissipation of energy. Relative energy loss in the ramp depends not only on the discharge but also on boulder concentration and their sizes. A relationship is proposed that satisfactorily determines the dissipation of energy on the ramp with base material and boulders placed with a staggered arrangement.
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Acknowledgments
The writers wish to sincerely thank the anonymous reviewers whose comments greatly improved the quality of this technical note.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 135 • Issue 6 • June 2009
Pages: 522 - 526
Copyright
© 2009 ASCE.
History
Received: Nov 29, 2007
Accepted: Dec 11, 2008
Published online: May 15, 2009
Published in print: Jun 2009
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