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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Estimating downstream scour of the grade-control structure using nonlinear regression and genetic pr...
Estimating downstream scour of the grade-control structure using nonlinear regression and genetic programming
Author : MASOUMEH FATTAHI(1), BABAK LASHKAR-ARA(2) & MAHSA VALIPOUR(3)
ABSTRACT
This paper describes nonlinear regression and genetic programming approachs for predicting scour downstream of
grade control structures. dimensional analysis and nonlinear regression-based equations proposed for estimation of
maximum scour depth, location of the scour hole, location and height of the dune downstream of the structures.In the
second part, The GP-based formulation results are compared with experimental results and other accurate equations
.The results analysis showed that the equations derived using Forward Stepwise nonlinear regression method have
correlation coefficient of R2  0.962 and 0.971 respectively for estimating the relative parameter of maximum scour
depth s z in comparison with the genetic programming model. Furthermore, the slope of the fitted line extracted from
computations and observations for dimensionless parameters s z , XS z , hd z , XD z using both model indicate the
superiority of nonlinear regression equations over genetic programming (GP)
File Size : 500,633 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 28/08/2015
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