Modelling the water quality in dams within the Umgeni Water operational area with emphasis on algal relations / Philip Mark Graham

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dc.contributor.author Graham, Philip Mark
dc.date.accessioned 2009-02-20T08:09:51Z
dc.date.available 2009-02-20T08:09:51Z
dc.date.issued 2007
dc.identifier.uri http://hdl.handle.net/10394/1022
dc.description Thesis (Ph.D. (Botany))--North-West University, Potchefstroom Campus, 2004.
dc.description.abstract Based on many years of water quality (including algal) and water treatment cost data, available at Umgeni Water, a study was undertaken to better understand the water quality relationships in man made lakes within the company's operational area, and to investigate how water quality affected the cost of treating water from these lakes. The broad aims to the study were to: identify the key environmental variables that were affecting algal populations in lakes; and if these were significant to establish predictive models relating algae to the water quality; and to develop models relating the water quality in lakes to the cost of treating water from the lakes. Semi-quantitative models were developed relating algal abundances with important environmental variables. In most cases, the models developed were related to algal populations that were known to adversely affect water treatment. Direct algal impact on water treatment processes was through the production of either taste and odour forming compounds (requiring advanced water treatment, such as use of activated carbon), or their ability to clog sand filters and so reduce filter run times (requiring more frequent backwashing of filters). Thereafter lake water quality parameters (which included water physico-chemistry and algae) were investigated to determine which factors were most significantly impacting on water treatment and hence treatment costs at selected water works (WW) within the Umgeni Water operational area. Models were developed relating raw water quality entering respective water works with costs incurred in treating that water. The models allowed simulations to be developed illustrating how changes in water quality might impact on water treatment costs. The impact of eutrophication and contamination of rivers and lakes, and its subsequent impact on surface water resources, was quantified.
dc.publisher North-West University
dc.subject Algae en
dc.subject Environment en
dc.subject Contaminants en
dc.subject Eutrophication en
dc.subject Water treatment en
dc.subject Water quality en
dc.subject Lakes en
dc.subject Dams en
dc.subject Reservoirs en
dc.subject Rivers en
dc.subject Cost models en
dc.subject Water treatment cost en
dc.subject Modelling en
dc.title Modelling the water quality in dams within the Umgeni Water operational area with emphasis on algal relations / Philip Mark Graham en
dc.type Thesis en
dc.description.thesistype Doctoral

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    This collection contains the original digitized versions of research conducted at the North-West University (Potchefstroom Campus)

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