published_or_final_version / abstract / toc / Real Estate and Construction / Master / Master of Science in Construction Project Management

Sediment control devices (SCDs) are critical to reducing the contamination of waterways from adjacent construction sites. Perimeter sediment controls retard the flow of surface runoff water originating on site and subsequently reduce solid, nutrient, and metal concentrations suspended in the flowing water. Silt fence is a commonly used SCD comprised of geotextile filter fabric, steel or wood support posts, and wire mesh reinforcement. The Georgia Department of Transportation (GDOT) uses an extensive amount of silt fence every year, and because of high degradation of geotextile in the field, the silt fence installations are rarely recycled. This research measures the performance of five SCDs (two types of silt fence, mulch berm, compost sock, and straw bales) at suspended solid, turbidity, nutrient, and metal reduction. A life cycle analysis (LCA) is performed to identify environmental impacts associated with material production, assembly, installation, use on site, and disposal. An impact analysis is performed according to for each SCD. Results of the impact analysis are compared to determine the SCD with lowest overall environmental impact. Results of the SCD performance study show that silt fence installations performed the best at reducing suspended solids and turbidity, mulch was best at reducing nutrients, and compost was the best at reducing metal concentrations. The life cycle impact analysis indicates that a mulch berm is the SCD with the lowest overall environmental impact. The impact analysis included global warming potential, acidification, eutrophication, and aquatic toxicity.

Since the 1970's, the increasing scale and complexity of development schemes has led to mounting public concerns about their environmental impacts. Environmental assessment and management developed out of a recognised need to protect the biophysical environment from overuse and degradation . Evidence suggests that the issues continue to become more complex and we need to equip ourselves to deal with them. The complexity of issues we face today demands a holistic and integrated management approach. This thesis highlights the weakness in the application of environmental impact assessment (EIA) to deal with current issues . The conceptualization of EIA within the ecological modernisation discourse has limited the use of the tool to adequately consider issues outside the biophysical environment. On the African continent, social issues such as HIV/AIDS are becoming more dominant than biophysical impacts. EIA must thus be re-framed to address concerns regarding the HIV/AIDS impact of development schemes. An alternative discourse of social justice is put forward as an approach that will take EIA closer to achieving sustainable development. The hypotheses put forward in the thesis were investigated through the use of both primary and secondary data sources. Extensive interviews and case studies formed the bulk of the data generated through the study. The results of the investigation showed that there are varying views on the purpose of EIA, that social issues continue to be underplayed in the process and that HIV/AIDS is considered a valid impact to be assessed in EIA. It must be noted that although HIV/AIDS is recognized as a common impact of development projects, particularly in Africa , the approach to dealing with the issue has been very different across EIAs and the issue is dealt with in an ad hoc manner. In order to expand the applicability of environmental assessment in Africa , a framework has been developed to integrate HIV/AIDS into the EIA process. The premise behind the framework is that HIV/AIDS can impact on the viability of a development scheme and conversely, development schemes can increase the transmission of HIV. The framework considers the social, economic and cultural drivers that create living and working environments, which promote the transmission of HIV. By applying the appropriate tools throughout the EIA process, one can identify potential impacts. Mitigation and management interventions can then be built into an HIV/AIDS component of the environmental management plan. This approach will allow environmental assessment practitioners; decision-makers and developers to better understand the critical issue of HIV/AIDS and ultimately contribute to managing the pandemic and further sustainable development in Africa. / Thesis (M.Sc.)-University of KwaZulu-Natal, 2005.

Sustainable development’s wide scale adoption has resulted in the rapid emergence of the field Sustainability Science. This trans-disciplinary field of research attempts to understand the interconnectedness, relationships and complexity between the natural environment and society. To understand these relationships and integration between the natural environment, the economy and society within a sustainability context, an ecosystem goods and services (EGS) approach can be taken. EGS research is being incorporated into mainstream environmental decision-making and strategic thinking, particularly within the corporate sector, however, adoption has been slow. The Corporate Ecosystem Services Review (ESR) is a framework, developed by the World Research Institute (WRI), which aims to assess the dependence and impact that a company has on EGS through a systematic approach. This methodological framework can be adapted into a tool that assists in more informed environmental decision-making at a local government level. This adapted tool highlights EGS issues within particular open spaces and links these issues to sustainability targets and identifies risks and opportunities for local government. For this research, the ESR tool was tested on open spaces within the Msunduzi Municipality, KwaZulu-Natal, by adapting the ESR methodological framework to relate to local government decision-making and by incorporating existing tools and strategic documents, namely the Environmental Management Framework (EMF) and the Spatial Development Framework (SDF), into the EGS assessment tool. Site-specific EGS issues were identified at two open space study sites through posing different development scenarios, and results from testing the tool revealed linkages between EGS and risks and opportunities for sustainability. The tool has applicability to local level decision-making, particularly in the early stages of development planning, by providing a more holistic input into the environmental decision-making process. / Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2012.

This dissertation analyses the history of the politics of pollution and petroleum refining in South Africa during the first decade of Apartheid, focusing on the country's first two oil refineries, both of which were built by multinational oil companies in Durban in the 1950s and 60s. It traces the origins of the development of environmental regulation in relation to oil refinery pollution. The dissertation outlines the development of a sense of disillusionment caused by the persistence of pollution problems associated with petroleum refining in the face of failed attempts at technological and expert interventions. The study identifies the existence of a civic culture amongst Bluff residents founded on ratepayer and landowner identities, through which they were able to exercise considerable purchase on the local State. Ultimately, the story of how two petroleum refineries ended up in the midst of residential communities in south Durban's represents a reiteration of the importance of race to the development of local urban landscapes during Apartheid. / Thesis (M.A.)-University of KwaZulu-Natal, Durban, 2004

The St Lucia estuarine lake system in South Africa is part of a UN- ESCO World Heritage site and a Ramsar wetland of international importance. Like many estuarine systems worldwide St Lucia has experienced signi cant anthropogenic impacts over the past century including catchment land use changes, water diversions/abstractions and inlet manipulation. In addition, the system has recently su ered losses in species diversity and abundance following unprecedented hy- persaline conditions and desiccation. Questions regarding its sustain- ability have motivated a reevaluation of management decisions made in the past and of options for the future. To understand the func- tioning of the system, it is necessary to analyse it holistically in terms of the physical processes and their interaction with the biology. This study focusses on aspects of the biophysical interactions in the estu- arine complex, and aims to provide new knowledge to underpin the development of improved models for predicting the response of the system to anthropogenic interventions. A model for the water and salt budgets was used to investigate what if scenarios in terms of past anthropogenic interventions, in particular the e ects of diverting the Mfolozi River from St Lucia. Furthermore, the risks of hypersalinity and desiccation were assessed for each sce- nario. Integrating these modeled scenarios with observed biological responses to physicochemical changes suggested that large long-term changes in the ecological structure can be expected in the di erent management scenarios. To validate this, the ecosystem response to changing environmental responses was quantitatively assessed using ecological network analysis. Long-term simulations show that the separation of the Mfolozi and St Lucia mouths had a signi cant impact on the functioning of the St Lucia system. The Mfolozi plays a pivotal role in maintaining a more stable mouth state regime and provides a vital source of freshwater during dry conditions. The con guration of the Mfolozi/St Lucia inlet plays a key role in the physico-chemical environment of the system and in uences the system's susceptibility to desiccation and hypersaline conditions. Ecosystem indices revealed that the water level, salinity and mouth state have a signi cant impact on species abundance and diversity as well as the ecological structure and functioning of the system. In addition, ecosystem indices show that the system recovers rapidly during favourable conditions. The arti cial separation of the St Lucia and Mfolozi inlets underpins the most signi cant impacts on the water and salt budget of the lake and its reversal is key to the sustainability of the system. / Thesis (Ph.D.)-University of KwaZulu-Natal, Durban, 2013.

Includes bibliographical references (leaves [268]-285) / xiv, 285, [85] leaves : ill. (some folded), maps (col., folded) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Geographical and Environmental Studies, 2002

Thesis (M.Env.St.)--University of Adelaide, Dept. of Geographical and Environmental Studies, 2001. / Bibliography: leaves 85-91.

Thesis (Ph.D.)--University of Melbourne, Melbourne School of Land and Environment, 2009. / Typescript. Includes bibliographical references (p. 361-386)

Impact assessment is a requirement for development in many countries across the globe, seeking to inform the decision-maker as to the environmental, social and economic impact of an ongoing or proposed project. Socioeconomic impact assessment (SEIA) is a means of informing decision-makers as to the socioeconomic effects a project could have, or is having, thus contributing to informing adaptive management practices. However, the tendency of socioeconomic impact assessment to highly quantitative economic methods of analysis raises the question of whether the desired results are achieved by the process. The purpose of the research was to determine whether highly quantitative forms of economic analysis are suitable for measurement of impacts in a social context where distributive as well as net impact is important; to critically analyze the method utilized in achieving highly quantitative economic impact assessment results; and lastly to draw conclusions and make recommendations regarding the efficacy of monitoring processes used to inform adaptive management practices. The research was conducted by means of a case study focusing on three SEIAs carried out on the same entity, namely the Addo Elephant National Park. Managed by South African National Parks (SANP), it began expanding its borders in the early 2000s. Funded by the World Bank, SANP was required to carry out a comprehensive Strategic Environmental Assessment (SEA) in 2003 to ensure the expansion did not have negative environmental, social and economic repercussions, and where such consequences were unavoidable, to ensure that mitigation and management thereof was informed by useful monitoring exercises. Given the need for resettlement and issues of economic distributive concern raised in the 2003 SEA, the three socioeconomic impact assessments conducted from 2005 – 2010 as part of the ongoing monitoring exercises formed an ideal framework for answering the primary research questions. The findings indicate that despite consistent terms of reference, different assessors interpret mandates from the commissioning body in different ways, leading to varied applications of the same theory, some methodologically better than others. Economic multiplier analysis was found to be inadequate as a measure of the distributive effects of economic impact. Moreover, a lack of consistency, accountability and transparency in the monitoring process led to three sets of results that were incomparable over time and thus inadequate as a means to inform adaptive management practices. Asymmetries of and between power and expertise in the commissioning body and the assessors led to breakdowns of the assessment process in terms of accountability and integrity and resulted in a failure to properly define the scope of the study and measure the relevant indicators. The following recommendations were made: that the economic multiplier method be complemented by additional methods of analysis when utilized in disparate social contexts where distribution of economic benefit is important; that monitoring practices be systematized at an early stage of the process to ensure comparable results useful in informing ongoing management practices; and that what an assessment measures and how it measures it be clarified with reference to an objective source. Finally, the number of factors for consideration in any impact assessment means that measurement of the full picture suffers resource constraints, emphasizing the need for impact assessment oversight to recognize the deficiencies of the process whilst still acknowledging that ‘some number is better than no number’.