Thesis (MMed.)-University of KwaZulu-Natal, Durban, 2009. / Full text also available online. Scroll down for electronic link.

Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 75-78).

Thesis (M.S.)--Wisconsin. / Includes bibliographical references (leaves 218-226).

Thesis (M.S.)--Humboldt State University, 2007. / Includes bibliographical references (leaves 20-22). Also available via Humboldt Digital Scholar.

Thesis (MScIng)--University of Stellenbosch, 2008. / Bibliography. Also available via the Internet.

The thesis examines the theoretical bases for determining optimal pollution levels in the Trent River Basin, demonstrates that neither the organization of a so-called "market in pollution rights" nor the construction of marginal effluent treatment cost and marginal damage functions is a practical means of finding those levels, and proposes ways for using existing data and the Trent Research Programme river model to determine "roughly optimal" pollution levels.

Considerable controversy exists in the world with respect to coastal quality. A multidisciplinary project was initiated to examine the health effects of bathing in sewage contaminated coastal waters, using a popular beach resort, Whitmore Bay, close to the cities of South Wales; and to explore ways of measuring public perception of coastal pollution at selected beaches in South Wales including Whitmore Bay, Langland Bay and Cefn Sidan. The research also investigated the regulatory framework responsible for the sustainability of coastal tourism and the effectiveness of beach award flags as marketing tools in the promotion of resorts. Current legislation addresses coastal pollution in terms of physical health criteria with little regard given to aesthetic quality of sea/landscape and psychological well-being of the beach user. It is necessary to overcome the dichotomised approach to beach management by crossing the boundaries between the physical and social sciences in order to take an holistic view of the coastal scene, accounting for environmental, political, economic and social aspects. An epidemiological/microbiological investigation was conducted at Whitmore Bay during the summer of 1995. Statistical modelling. using Linear Logisitic Regression, indicated swimmers to significantly increase their chance of contracting an illness in comparison to non-swimmers and also identifed non-water related factors to have a confounding effect; no interaction was observed. These findings were in congruence with other major studies. Beach questionnaires were distributed to elicit information on the activities, health and socio-demographic characteristics of the subjects during the day of the survey (n=1276). A telephone interview schedule was utilised 10 days post the beach survey to investigate the differential in illness rates between the cases and controls (n=585). Water sampling was carried out on the days of the health risk survey. Although, high counts of both Ecoli and faecal streptococci were recorded, reaching an average of 3400 and 440 per 100ml respectively, no dose response relationship was observed between morbidity rates and bacterial indicator density. A semi-structured questionnaire was employed to obtain data on beach user perception to coastal pollution and beach award schemes for both the 1995 and 1996 surveys. The 1995 questionnaire served a dual approach running simultaneously with the epidemiological-microbiological analysis (n=1276). The 1996 survey questionnaire was developed from the original 1995 questionnaire. and distributed at an additional two beaches in South Wales, Langland Bay and Cefn Sidan, (n=821). Results of both surveys showed that beach users were acutely aware of coastal pollution both land based and marine and suggested that public awareness of the different beach award schemes is low. Of the different types of award systems included on the questionnaire, the European Blue Flag Award gained highest recognition (26-30%), but even those that identified with it often had a misunderstanding of its true meaning. If consumers misinterpret the meaning of the flag which flies on a designated beach. then the designation of the beach will do little to offset consumers' concerns about health risks.

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