The purpose of the labyrinth weir is to increase the discharge per unit length of structure normally obtained from a conventional weir when operating under identical head conditions. This is achieved by compressing a large length of crest in concertina form, into the space available on site. The investigation carried out as described in this thesis aimed to provide comprehensive performance data covering all aspects of labyrinth weir behaviour. This has been achieved by a series of experimental model tests. The initial experimental work was confined to basic labyrinth weir configurations and the significance of the parameters of fundamental importance has been determined. This allowed the definition of the most useful ranges of weir design and subsequent experimental tests were confined to within these ranges. Following the initial experimental work tests were conducted to determine the significance of all the parameters of secondary importance including various refinements to the weir designs such as sloping channel inverts and alternative crest sections etc. A comprehensive set of experimental performance data covering all aspects of labyrinth weir design and behaviour are thus contained in the thesis. A mathematical model representing the behaviour of the weirs has been constructed and translated into a computer programme. Close correlation has been achieved between the theoretical and experimental results and the programme will accurately predict the performance of any labyrinth weir subject to some minor restrictions. The computer programme is included in the thesis so that it will be available to anyone wishing to use it. A design method using two design charts has been developed. This enables the design and performance prediction of any weir designed in accordance with recommendations contained in the thesis. The design charts are included in the text together with a worked example illustrating their use.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:553842 |
| Date | January 1968 |
| Creators | Taylor, Geoffrey |
| Publisher | University of Nottingham |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://eprints.nottingham.ac.uk/12857/ |
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