Porous weirs for flood mitigation

Saunders, Joseph Ian (2007) Porous weirs for flood mitigation. [USQ Project]


Download (1MB)


[Abstract]: Porous weirs offer an alternative design that could be adopted for flood mitigation.

The aim of this project is to construct and simulate a 1:25 scale model of a porous weir in the wide flume of the USQ hydraulics laboratory. The goal is to determine a
relationship between upstream storage (depth) and the discharge of the weir to be use in being able to determine the flood mitigation potential of the porous weir.

The flow through the porous weir is to be analysed by analogy to the Darcy type equations and open channel flow equations. When the depth of flow exceeds the height of the weir an attempt will be made to fit a general weir type equation to the measured data.

Results have shown that turbulent flow exists in the model and that the traditional Darcy equation does not fit the flow through the weir. However a good relationship was found by analogy to the general equation of gradually varied flow when the flow was through the porous media. Once the flow exceeded the height of the weir it was found that the flow closely resembled the flow of a traditional hard weir.

Statistics for USQ ePrint 3992
Statistics for this ePrint Item
Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering (Up to 30 Jun 2013)
Date Deposited: 12 Mar 2008 05:38
Last Modified: 02 Jul 2013 22:59
Uncontrolled Keywords: porous weir; flood mitigation; Darcy equation
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090508 Water Quality Engineering
09 Engineering > 0905 Civil Engineering > 090509 Water Resources Engineering
Fields of Research (2020): 40 ENGINEERING > 4004 Chemical engineering > 400499 Chemical engineering not elsewhere classified
40 ENGINEERING > 4005 Civil engineering > 400513 Water resources engineering
URI: https://sear.unisq.edu.au/id/eprint/3992

Actions (login required)

View Item Archive Repository Staff Only