IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) FULL PAPERS : THEME 4- WATER ENGINEERING : SYMMETRIC AND ASYMMETRIC ENLARGEMENTS OF BLOCK RAMP STILLING BASINS
SYMMETRIC AND ASYMMETRIC ENLARGEMENTS OF BLOCK RAMP STILLING BASINS
Author : STEFANO PAGLIARA , MICHELE PALERMO
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 : 2,407,416 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) FULL PAPERS
Article : THEME 4- WATER ENGINEERING
Date Published : 19/04/2016
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