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) ALL CONTENT : Water engineering : Spillway jet: historical advance from weir toward standard spillway
Spillway jet: historical advance from weir toward standard spillway
Author : WILLI H. HAGER(1) & ROBERT M. BOES(2)
This research describes the development of the lower nappe trajectory definition issued by standard rectangular sharpcrested
weirs. Based on the experimentation of Henry Bazin in the late 19th century, who correctly scaled his data with
the approach overflow depth, the advances made particularly by the Hydraulic Laboratory of Padova University, Italy,
are highlighted. In addition, the Iowa Institute of Hydraulic Research has significantly contributed to the solution of this
problem. Numerical solutions were presented comparatively late given the complexities with gravity-affected water jets.
Currently, these questions are mainly solved by hydraulic model experimentation, given the challenges posed by the
effects of jet aeration, viscosity, and surface tension. The latter two are excluded if minimum overflow depths of the order
of 50 mm are considered, a main result of the researches discussed below.
File Size : 7,630,307 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 13/08/2015
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