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Long-term salinity changes in the Crocodile river catchment upstream of Hartebeespoort dam
Dissertation (MSc)--University of Pretoria, 2017.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2019
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| _version_ | 1867613589933654016 |
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| access_status_str | Open Access |
| author2 | Van Niekerk, H. |
| author_browse | Van Niekerk, H. |
| author_facet | Van Niekerk, H. |
| collection | Thesis |
| dc_rights_str_mv | © 2019 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 (MSc)--University of Pretoria, 2017. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/70521 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:38:33.603Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| 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:2263/70521 Long-term salinity changes in the Crocodile river catchment upstream of Hartebeespoort dam Van Niekerk, H. ALBERTVANEEDEN@GMAIL.COM Van Eeden, Albert UCTD Dissertation (MSc)--University of Pretoria, 2017. This research study investigated the changes in the salinity composition and fluctuation of the Crocodile river and its catchment upstream of the Hartbeespoort dam covering the period of 1985 to 2015. By analysing the 35-year long-term data sets of nine monitoring stations in the study area’s catchment, various trends and patterns emerged. Maucha diagrams and various graphs were drawn by utilising the above-mentioned data sets. These Maucha diagrams and graphs indicated the changes that took place in the salt composition of the water sources in the catchment of the study area over the 35-year study period. The following three salts, TDS, SO₄ and TAL, showed the biggest margin of change while the other salts remained fairly stable over the study period. Thus, the study focussed on these three salts. The five-yearly average of the TDS, SO₄ and TAL concentration, loads as well as the volume of water coming down the catchment were calculated. By interpreting the results, it was clear which sub-catchments were responsible for the specific salinity changes identified, as well as the possible sources of those changes in the salinity composition and fluctuation. Both the Jukskei river and the Bloubankspruit had significant impacts on the salt composition, concentration and loads in the Crocodile river although the nature of their impacts differed. The main drivers of salinity changes in the Crocodile river catchment were found to be anthropogenic sources such as increased run-off resulting from urbanisation, the progressive expansion of hard surfaces, increase in economic and industrial activities with their corresponding pollution sources, population growth, water transfer from outside the study area’s catchment and an increase in the volume of water deposited study area’s catchment. The importance of continued monitoring and sampling programmes were emphasised during this research study. Zoology and Entomology MSc Unrestricted 2019-07-08T09:46:44Z 2019-07-08T09:46:44Z 2019/04/24 2017 Dissertation Van Eeden, A 2017, Long-term salinity changes in the Crocodile river catchment upstream of Hartebeespoort dam, MSc Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/70521> A2019 http://hdl.handle.net/2263/70521 en © 2019 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 Long-term salinity changes in the Crocodile river catchment upstream of Hartebeespoort dam |
| title | Long-term salinity changes in the Crocodile river catchment upstream of Hartebeespoort dam |
| title_full | Long-term salinity changes in the Crocodile river catchment upstream of Hartebeespoort dam |
| title_fullStr | Long-term salinity changes in the Crocodile river catchment upstream of Hartebeespoort dam |
| title_full_unstemmed | Long-term salinity changes in the Crocodile river catchment upstream of Hartebeespoort dam |
| title_short | Long-term salinity changes in the Crocodile river catchment upstream of Hartebeespoort dam |
| title_sort | long term salinity changes in the crocodile river catchment upstream of hartebeespoort dam |
| topic | UCTD |
| url | http://hdl.handle.net/2263/70521 |