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Investigating the limitations of the discharge-head relationship of compound crump weirs exceeding their hydraulic capacities
Dissertation (MEng (Water Resources Engineering))--University of Pretoria, 2020.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2021
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| _version_ | 1867613675154571264 |
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| access_status_str | Open Access |
| author2 | Van Vuuren, S.J. |
| author_browse | Van Vuuren, S.J. |
| author_facet | Van Vuuren, S.J. |
| collection | Thesis |
| dc_rights_str_mv | © 2020 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng (Water Resources Engineering))--University of Pretoria, 2020. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/79278 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:39:54.964Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/79278 Investigating the limitations of the discharge-head relationship of compound crump weirs exceeding their hydraulic capacities Van Vuuren, S.J. u10690515@tuks.co.za Wessels, Pieter Maritz, Ashley Amy UCTD Engineering, built environment and information technology theses SDG-06 SDG-06: Clean water and sanitation Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-13 SDG-13: Climate action Dissertation (MEng (Water Resources Engineering))--University of Pretoria, 2020. The variability of the South African (SA) climate results in abrupt changes in river discharge rates. Compound weirs have been implemented as an attempt to ensure accurate discharge calculations over an extended, but limited, range of flows. It would be financially and practically impossible to design compound weirs that can measure the entire range of flow rates that are experienced in SA rivers to the same degree of accuracy. Extensive research on the accuracy of weirs, within their intended hydraulic capacity, has been done over the years. However, when weirs operate above this capacity, three-dimensional flow is observed as a result of the presence of the divider and flank walls. The observed three-dimensional flow causes uncertainty in the application of the current discharge-head relationships, as these relationships were developed with the assumption of parallel flow lines. In this dissertation, a physical model study was done at the Department of Water and Sanitation hydraulic laboratories. The results indicated that the flow rates, calculated using the current discharge-head relationships, consistently over-estimates the input flow rates. Additionally, a numerical model study using Computational Fluid Dynamics (CFD) software STAR-CCM+ was done. CFD proved to be a valuable tool for extending the domain of the study. A comparison of the physical model and numerical model results is shown with some comments on shortcomings identified in the user-defined volume mesh inputs that could not be addressed in this study due to time and resource limitations. Civil Engineering MEng (Water Resources Engineering) Unrestricted 2021-04-06T07:22:38Z 2021-04-06T07:22:38Z 2020/05/05 2020 Dissertation Maritz, AA 2020, Investigating the limitations of the discharge-head relationship of compound crump weirs exceeding their hydraulic capacities, MEng Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/79278> A2020 http://hdl.handle.net/2263/79278 en © 2020 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Engineering, built environment and information technology theses SDG-06 SDG-06: Clean water and sanitation Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-13 SDG-13: Climate action Investigating the limitations of the discharge-head relationship of compound crump weirs exceeding their hydraulic capacities |
| title | Investigating the limitations of the discharge-head relationship of compound crump weirs exceeding their hydraulic capacities |
| title_full | Investigating the limitations of the discharge-head relationship of compound crump weirs exceeding their hydraulic capacities |
| title_fullStr | Investigating the limitations of the discharge-head relationship of compound crump weirs exceeding their hydraulic capacities |
| title_full_unstemmed | Investigating the limitations of the discharge-head relationship of compound crump weirs exceeding their hydraulic capacities |
| title_short | Investigating the limitations of the discharge-head relationship of compound crump weirs exceeding their hydraulic capacities |
| title_sort | investigating the limitations of the discharge head relationship of compound crump weirs exceeding their hydraulic capacities |
| topic | UCTD Engineering, built environment and information technology theses SDG-06 SDG-06: Clean water and sanitation Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-13 SDG-13: Climate action |
| url | http://hdl.handle.net/2263/79278 |