Computer Program for Optimal Design of Low Head Diversion Structures
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Date
2009-10
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Addis Ababa University
Abstract
A computer program named HelaFlow is developed for optimal design of low-head
diversion structures using visual basic.Net programming language. The program calculates
the parameters of a diversion structure’s components that are set in consideration of surface
flow, subsurface flow, nature of foundation soil, structural stability and economy. It solves
the uplifting pressure head distribution on the structure using finite difference technique,
allowing for accurate design of structures built on anisotropic and/or shallow as well as
isotropic and deep permeable media. It also optimizes the parameters of components for
least cost design using cost of construction of components as input. The effects of
anisotropy and variation in depth of permeable media were analyzed and found to affect the
magnitude and distribution of uplifting pressure head on the apron of structures. Sample
designs are presented to demonstrate the capability of the software program. This study
equips the design engineer with a convenient decision tool for optimal design of low-head
diversion structures.
Key words: diversion structure, subsurface flow, hydraulic jump, finite difference method,
Anisotropy, optimization
Description
Keywords
Diversion Structure; Subsurface Flow; Hydraulic Jump; Finite Difference Method; Anisotropy; Optimization