Water quality in the upper Klip River, Region 5, City of Johannesburg
- Authors: Kruger, Welna
- Date: 2009-02-05T07:10:05Z
- Subjects: Water quality , Klip River (South Africa) , Johannesburg (South Africa)
- Type: Thesis
- Identifier: uj:8072 , http://hdl.handle.net/10210/2002
- Description: M.Sc. , The main aim of this study is to determine the water quality of water sampling points situated in Region Five of The City of Johannesburg. The water quality is studied over a three-year period from July 2000 until June 2003; this includes a dry, normal and rainy year. Region Five falls within the Upper Klipriver sub-catchment, which forms part of the Klip river catchment. The physical, chemical and microbiological sampling results are obtained from Rand Water. These results are compared with the water quality guidelines as set by the Department of Water Affairs and Forestry namely for domestic use, recreational use and aquatic ecosystems, as well as the guidelines set by Rand Water. These results of the variables that were selected are depicted visually in the form of graphs. A scientific approach is followed with respect to the water quality results. The significance of the data is statistically evaluated by using the Student’s t-test. The seasons are divided into two groups namely the more dry and cool season (autumn/winter) and the more rainy and hot season (spring/summer). This is done to determine if the seasons have a significant effect on the water quality results in comparison to each other. The water quality results are then discussed with respect to the different sampling sites. Sampling point K9, the stream at Durban Roodepoort Deep mine delivered the most problematic results of the different sampling points studied, and indicated that acid mine drainage was taking place during the sampling period. The other sampling points are less problematic. Point and non-point source pollution are elaborated on, and recommendations are made to improve the water quality at the sampling points selected.
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The ecological integrity of the Klip River and the development of a sensitivity weighted fish index of biotic integrity (SIBI)
- Authors: Kotze, P. J.
- Date: 2008-10-13T09:46:47Z
- Subjects: Klip River (South Africa) , Biotic communities , Stream ecology , Freshwater ecology , Microbial ecology
- Type: Thesis
- Identifier: uj:11725 , http://hdl.handle.net/10210/1144
- Description: Ph.D. , The primary objective of the study was to determine the ecological integrity of the Klip River. The protocols applied during the study gave a reliable and good reflection of the overall ecological integrity, as well as the state of different components determining the overall integrity. The ecological integrity of the most recent assessment (February 1999) is summarized in Figure 8.2. It was decided to keep the different components determining ecological integrity (physico-chemical, physical, biological) separate and not to combine everything into one score. When expressed separate, such as in the case of Figure 8.2, it is possible to observed deterioration in overall ecological integrity at a site, and it is also evident which of the components are responsible for the degradation. As mentioned previously, biological communities, and thus biotic integrity, are the best indicators of overall ecological integrity, due to the fact that they integrate both water and habitat related stresses over time. Habitat and water quality assessments are indications of the conditions prevailing at the time of sampling, while biota give an indication of the conditions prevailing over the long term. Invertebrates have shorter life cycles, and in many cases have a terrestrial phase, therefore they recolonise quicker than fish may be able to do after a pollution incident. Invertebrates can therefore be seen as indicators of short-term biological integrity, while fish indicate long-term biological integrity of a river. , Prof. G.J. Steyn
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