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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Symmetric and asymmetric enlargements of block ramp stilling basins
Symmetric and asymmetric enlargements of block ramp stilling basins
Author : STEFANO PAGLIARA(1), MICHELE PALERMO(2)
ABSTRACT
Block ramps can reduce the impact of anthropic river restoration structures on the river eco-systems. The correct
assessment of their effects on the river system in which they are located is depending on several factors. Among others,
the most relevant are: the hydraulic and geometric parameters characterizing the river branch and the geometry of the
stilling basin. In particular, this last aspect is of fundamental importance as the downstream stilling basin has a significant
role both for the structure stability and for the dissipative process. Nevertheless, the stilling basin geometry is a key
parameter for scour morphology characteristics. The aim of the present paper is to compare the morphological
characteristics of the scour hole in basins characterized by different geometries downstream of block ramps. Namely, the
analysis of scour hole profiles and characteristics were conducted for stilling basins with the same width of the upstream
ramp and compared with those occurring in symmetrically and asymmetrically enlarged basins, in order to highlight
similitudes and differences. The comparison of scour typologies occurring under different stilling basin configurations was
discussed and analyzed. The results of the analysis put in evidence the prominent effect of the stilling basin configurations
on both scour hole dimensions and flow features. In particular, the knowledge of different scour typologies occurring in the
tested stilling basins could be extremely beneficial for a correct design of the structure.
File Size : 1,425,961 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 20/08/2015
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