Thesis (Ph. D.)--University of California, Santa Cruz, 1989. / Typescript. Includes bibliographical references.

Thesis (Ph. D.)--Ohio State University, 2003. / Includes abstract and vita. Includes bibliographical references (leaves 130-139). Also available via the Internet.

Thesis (Ph.D.) -- McMaster University, 2001. / Includes bibliographical references (leaves 237-281). Also available via World Wide Web.

Thesis (Ph. D.)--University of Texas at Austin, 2005. / Vita. Includes bibliographical references.

Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2005. / Includes bibliographical references (leaves 200-223). Also available in electronic version.

Thesis (Ph.D. (Biochemistry, Microbiology & Biotechnology)) - Rhodes University, 2007.

Thesis (Ph. D.)--Texas State University-San Marcos, 2007. / Vita. Appendices: leaves 241-521. Includes bibliographical references (leaves 233-240).

abstract: Water resource management is becoming increasingly burdened by uncertain and fluctuating conditions resulting from climate change and population growth which place increased demands on already strained resources. Innovative water management schemes are necessary to address the reality of available water supplies. One such approach is the substitution of trade in virtual water for the use of local water supplies. This study provides a review of existing work in the use of virtual water and water footprint methods. Virtual water trade has been shown to be a successful method for addressing water scarcity and decreasing overall water consumption by shifting high water consumptive processes to wetter regions. These results however assume that all water resource supplies are equivalent regardless of physical location and they do not tie directly to economic markets. In this study we introduce a new mathematical framework, Embedded Resource Accounting (ERA), which is a synthesis of several different analytical methods presently used to quantify and describe human interactions with the economy and the natural environment. We define the specifics of the ERA framework in a generic context for the analysis of embedded resource trade in a way that links directly with the economics of that trade. Acknowledging the cyclical nature of water and the abundance of actual water resources on Earth, this study addresses fresh water availability within a given region. That is to say, the quantities of fresh water supplies annually available at acceptable quality for anthropogenic uses. The results of this research provide useful tools for water resource managers and policy makers to inform decision making on, (1) reallocation of local available fresh water resources, and (2) strategic supplementation of those resources with outside fresh water resources via the import of virtual water. / Dissertation/Thesis / Ph.D. Civil and Environmental Engineering 2013

Wastewater treatment wetlands are proven valuable alternatives to the treatment of wastewater in a more natural environment. These wetlands can be natural or constructed, and come in a variety of types and sizes. The purpose of this study was to determine the efficiency of water treatment for nutrients and pollutants utilized by the City of Lakeland in treating their municipal wastewater by wetland treatment system cells. This study is important in order to ensure the successful use of the wetland, as well as to determine the impacts previous phosphorus mining use may have on the effectiveness of treatment. Following FDEP standard operating procedures, this study monitored various water quality parameters for three consecutive summer months. The wetland as a whole varied in the removal of nutrients. The wetland was best at decreasing concentrations of TN and TP, at eighty-three percent and fifty-four percent, respectively, when compared to other parameters. This study shows how municipal wastewater is beneficially treated by wetland treatment system cells to produce viable water resources that can be reused in order to promote sustainable uses going into the future.

M.Sc. (Zoology) / An investigation was made into the water chemistry, bacteriology and macroinvertebrate fauna of the Elsburg Spruit and its major tributaries within the municipal boundaries of the City of Germiston. From the results obtained it is clear that the main stream and most of its tributaries are seriously affected by a combination of pollutants. Three types of pollution could largely be distinguished namely fecal bacterial contamination of parts of the stream system which may be related to the possible discharge in the stream of domestic sewage. This in turn may be a major source of organic enrichment of the water of the stream at some places. Acid pollution associated with high mineral loads and heavy metal concentrations which in the latter case could be traced to mining regions and industrial areas in the catchment area of the system. Despite the serious disturbance of stream conditions in the upper region of the Elsburg Spruit some recovery does in fact take place in the lower lying regions of the Elsburg Spruit where the stream flows for several kilometers through a natural vlei area. Certain recommendations are made concerning the location and possible elimination of the major sources of pollution.