Aeration Performance of Triangular Planform Labyrinth Weirs
- 1 August 1998
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Environmental Engineering
- Vol. 124 (8), 709-719
- https://doi.org/10.1061/(asce)0733-9372(1998)124:8(709)
Abstract
A high level of dissolved oxygen is vital for the maintenance of healthy streams and rivers. Structures in rivers can increase dissolved oxygen levels by creating turbulent conditions where small air bubbles are carried into the bulk of the flow. Plunging overfall jets from weirs are a particular instance of this, and the aeration properties of such structures have been studied widely in the laboratory and field over a number of years. On the other hand, labyrinth weirs, where the weir sill is cranked in planform thus increasing their length, have received little or no attention in this context. They have a proven hydraulic advantage over straight weirs of increased discharge at the same head for design conditions. However, they also serve to modify the combined overfall jet as individual jets from adjacent sections of the weir collide. This paper describes an experimental investigation into the nature of these jets and how they affect the aeration performance of a triangular plan labyrinth weir. It is de...Keywords
This publication has 8 references indexed in Scilit:
- Measurement of Air‐Water Oxygen Transfer at Hydraulic StructuresJournal of Hydraulic Engineering, 1993
- Indexing Gas Transfer in Self‐Aerated FlowsJournal of Environmental Engineering, 1990
- Study of Aeration at Weirs and CascadesJournal of Environmental Engineering, 1987
- Small Stream Channel Dam Aeration CharacteristicsJournal of Environmental Engineering, 1983
- EFFECT OF TURBULENCE INTENSITY ON THE RATE OF AIR ENTRAINMENT BY PLUNGING WATER JETS.Proceedings of the Institution of Civil Engineers, 1980
- Effect of Water Temperature on Stream Reaeration: Thirty-first Progress Report by Committee on Sanitary Engineering DivisionJournal of the Sanitary Engineering Division, 1961
- Significance of Liquid-Film Coefficients in Gas AbsorptionIndustrial & Engineering Chemistry, 1951
- Principles of Gas Absorption.Industrial & Engineering Chemistry, 1924