Gene-Expression Programming Approach for Development of a Mathematical Model of Energy Dissipation on Block Ramps
Publication: Journal of Irrigation and Drainage Engineering
Volume 146, Issue 2
Abstract
A block ramp is an environmentally friendly stream restoration structure consisting of a base material of stone with minimal negative environmental impact. This not only decreases riverbed shear stress but also increases the flow resistance, thus reducing excess kinetic energy of the flow. This study used two mathematical models that were developed in a dimensionless form for smooth and rough-bed ramps. The models were calibrated and validated by two sets of experimental tests. A total of 308 experimental runs were done with eight different ramp slopes and six different gravel material sizes. The experimental results indicated that an increase in the relative roughness enhances energy dissipation. Additionally, energy dissipation increases along with an increase of ramp slope. Using a gene-expression programming soft computing model, two mathematical models were developed to estimate energy dissipation on smooth and rough-bed ramps. Additionally, the energy-loss performance of two configurations of interlocked and dumped blocks ramps was compared.
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Acknowledgments
The authors would like to acknowledge the Vice Chancellor for Research of Shahid Chamran University of Ahvaz for providing financial support to conduct this study (Grant No. 95/3/2/62356).
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Published In
Journal of Irrigation and Drainage Engineering
Volume 146 • Issue 2 • February 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Sep 1, 2018
Accepted: Sep 11, 2019
Published online: Dec 6, 2019
Published in print: Feb 1, 2020
Discussion open until: May 6, 2020
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