No Abstract Provided / Thesis / Bachelor of Arts (BA)

[Truncated abstract] Managed Aquifer Recharge (MAR) is a technique that can be used to capture and store water in aquifers for later reuse. This method recycles water that would normally be lost or discarded to the environment. MAR has been observed to have the potential for improving the quality of recharged water through a combination of physical, chemical and biological processes. The aim of this study was to investigate the changes in groundwater microbial population structure during MAR and the major influences that drive these population changes. Biogeochemical MAR studies have the potential to assist in the improved prediction of the removal of contaminants such as nutrients, pathogens and trace organics from the recharged water. Biological clogging during recharge also has the potential to overwhelm an aquifers ability to process wastewater thus reducing the hydraulic conductivity of the aquifer. Therefore further research into the spatial and temporal biogeochemical processes that occur during MAR is required. The geochemical and microbial population dynamics of two contrasting MAR techniques were investigated at two different geographical locations (Perth, Western Australia and Adelaide, South Australia). These MAR sites contained aquifers of dissimilar properties that were recharged with wastewater that contrasted in water quality. The Perth MAR site received secondary treated effluent which continuously infiltrated the unsaturated zone into an unconfined aquifer aided by infiltration galleries. Reclaimed water was extracted from a well at distance from the infiltration gallery. ... Notably the background and recovered water was most dissimilar in microbial and chemical population structure to that described for the infiltration gallery and injection well. Microbial and chemical evidence suggested that the background and extraction well groundwater were unaffected by plume migration. These results suggested that extraction well groundwater was similar in quality to that of ambient groundwater. Significant geochemical and microbial changes of secondary treated effluent during infiltration and lateral movement through aquifer were implicated in addition to the forced hydraulic gradient created from extracting fives time the volume of infiltrating wastewater. This study demonstrated that microbial populations and the geochemical processes associated with MAR can be studied and compared. Multivariate statistical methodology greatly simplified a vast array of dynamic biogeochemical information that could be dissected for meaningful interpretation over distance and time. The study evaluated the major biogeochemical influences which resulted in microbial and geochemical changes where it was noted that microbial populations were more dynamic than geochemical variation over time. Additionally biogeochemical comparative analysis indicated that microbial populations could change in population structure before a shift in aquifer geochemistry was detected. It is anticipated that the results from this study will benefit further research into the biogeochemical processes involved in water quality changes (e.g. nutrient removal, pathogen decay and biodegradation of trace organics) as well as controlling biological clogging of MAR schemes.

Issues arising from climate change and long-term natural climate variability have become the focus of much recent research. In this study, we specifically explore the impacts of long-term climate variability and climate changes upon flood frequencies. The analyses of the flood frequencies are carried out in a comparative manner in catchments located in semiarid-temperate and tropical landscapes in Australia, namely Perth, Newcastle and Darwin, using a process-based derived flood frequency approach. The derived flood frequency analyses are carried out using deterministic rainfall-runoff models that capture the intrinsic water balance variability in the study catchments, and driven by temporal rainfall event sequences that are generated by a stochastic rainfall model that incorporates temporal variabilities over a multiplicity of time scales, ranging from within-event, between-event to seasonal, multi-annual and multi-decadal time scales. Six climate scenarios are considered for Newcastle, that combine the ENSO (El Niño Southern Oscillation) and IPO (Inter-decadal Pacific Oscillation) modes of variability, and six different climate scenarios are considered for Perth and Darwin that combine these different ENSO modes and step changes in climate (upwards or downwards) that occurred in 1970 in both regions, which were identified through statistical analysis. The results of the analyses showed that La Niña years cause higher annual maximum floods compared to El Niño and Neutral years in all three catchments. The impact of ENSO on annual maximum floods in the Newcastle catchment is enhanced when the IPO is negative and for Perth, the impact of ENSO weakens in the post-1970 period, while it strengthens in Darwin in the same period. In addition, the results of sensitivity and scenario analyses with the derived flood frequency model explored the change of dominant runoff generation processes contributing to floods in each of the study catchments. These analyses highlighted a switch from subsurface stormflow to saturation excess runoff with a change of return period, which was much more pronounced in Perth and Darwin, and not so in Newcastle. In Perth and Darwin this switch was caused by the interactions between the out-of-phase seasonal variabilities of rainfall and potential evaporation, whereas the seasonality was much weaker in Newcastle. On the other hand, the combination of higher rainfall intensities and shallower soil depths led to saturation excess runoff being the dominant mechanism in Newcastle across the full range of return periods. Consequently, within-storm rainfall intensity patterns were important in Newcastle in all major flood producing events (all return periods), where they were only important in Perth and Darwin for floods of high return periods, which occur during wet months in wet years, when saturation excess runoff was the dominant mechanism. Additionally, due to the possibility of a change of process from subsurface stormflow to saturation excess when conditions suited this switch, the estimates of flood frequency are highly uncertain especially at high return periods (in Darwin and Perth) and much less in Newcastle (when no process change was involved).

[Truncated abstract] Background: A review of the literature indicated there was a need for more long-term randomised controlled studies on the effects of BRCA counselling/testing on high risk women, including improved strategies for risk communication. Reviews have also shown women are confused about the significance of inconclusive or non informative results with a need for more research in this area. Aims: The general aim of this study was to evaluate the impact of breast cancer genetic counselling on psychological distress levels, perception of risk, genetic knowledge and understanding of BRCA testing/test results in a cohort of 207 women from high risk breast cancer families who were referred for genetic counselling in Perth during the period 1997 to 2001. Short- and long-term impact of BRCA genetic counselling/testing was determined in women with and without cancer in a randomised controlled trial as part of which women were randomised to either receive immediate versus delayed genetic counselling. This included family communication patterns before BRCA testing, anticipated outcomes of testing on oneself and family including intentions for result disclosure. Comprehension of index and predictive BRCA testing with possible results was assessed both in the short- and the long-term and understanding of individual or family BRCA test results was evaluated at long-term. The effect of genetic counselling on breast cancer risk perception in unaffected women was evaluated. This study considered a theoretical framework of educational learning theories to provide a basis for risk communication with possible relevance for future research. ... Only 25% of the original study population (52/207) reported BRCA results and women's understanding of results is concerning. Key findings were: 1. The majority of affected women received an inconclusive result. 2. Out of twelve unaffected women who reported results, seven were inconclusive which are not congruent with predictive testing. This implies that these women did not understand their test result. 3. A minority of untested relatives did not know whether a family mutation had or had not been found in their tested family member or what their actual test result was. This implies either a lack of disclosure or that woman did not understand the rationale for and significance of testing for a family mutation. 4. Three relatives did not understand a positive result was a mutation. Conclusion: The implication of this research for breast cancer counselling and testing services is that women who wait for counselling are no worse off in terms of short- or long-term general psychological distress than women who receive the intervention early. There is a suggestion that unaffected women without the disease found counselling more advantageous than affected women. The meaning of BRCA results as reported by women is concerning particularly women's understanding of negative and inconclusive results and further research is needed in this area. Too much information presented at counselling may affect women's comprehension of risk, BRCA testing and future test results and further research is required to evaluate the effects of information overload.

The focus of this practical theological study is the analysis of the life and worship of the Perth Asian Christian Community in the New Life City Church, where we note fast maturation of Christians with a desire to complete the Great Commission. As participant observer using the qualitative method, I was able to identify how the NLCC is wall-less by interviewing different groups within the church and two Western sample groups. To accomplish this, Chapter two analyses the Western and Asian churches’ understanding of the concepts ‘church’ and ‘church growth’. The evaluations showed a difference in understanding. This prompted an inquiry in chapter three into their understanding of the Great Commission from the Western and Asian viewpoint against the Biblical understanding thereof. The intention of NLCC groups interviewed in Chapters four to eight was to detect what they perceived as helping them mature as Christians, considering many are first-generation Christians. The groups interviewed included founder members, first-generation Christians, youth group leaders, returned NLCC missionaries and the pastor. By Chapter nine it was established that the Asian Christian understood worship in a broader context. Chapter ten summarises the interpreted data of the groups interviewed and identifies stimulants for maturation of individual Christians in a post-Christian environment. The broader understanding of worship is discussed. These guidelines form the building blocks for a practical theological theory of church growth. / Practical Theology / D. Th. (Practical Theology)

[Truncated abstract] Rational order and play are often conceptualised as oppositional forces. In modern urban life especially, rational order is presented as destructive of a playful orientation towards life eschewing mystery through coherence, spontaneity through predictability, and contingency through systematic planning. In turn, the postmodern debate often asserts the reinvigoration of free, playful, and contingent individuals whose collective acts are destructive of the rationality of modern order with the present, in contrast to the past, offering a condition of enduring and unremitting uncertainty. This thesis explores the dynamic relation between rational order and play in urban society through an ethnographic account of a public commuter railway in Perth, Western Australia. Notwithstanding this ethnographic setting, the thesis addresses questions of broader significance through an analysis of the railway as an instance of public space and state techno-bureaucratic order. I investigate the creative process through which the state attempts to standardise the various operational components of the railway as well as the reasons underpinning the state's desire to produce what I term a 'clean machine'. In turn, I investigate how differentially positioned actors live within this carefully crafted machine. I do so by following the stories, experiences, and practices of: government administrators charged with building the railway; the managers who oversee the network's operation; the staff members who operate trains, clean stations, and discipline passengers; and the railway's end-users, including passengers and graffiti artists. ... In examining the two tensions of rational order/play and revelation/ concealment, I attempt to explicate how it is that people experience life as simultaneously coherent and serendipitous. In the thesis, I document the ways in which railway officials, passengers, and graffiti artists express a pervasive ambivalence towards their experience of the railway system. On the one hand, these actors experience the railway as a system of constraint that produces 'robotic' behaviours and automated transactions. On the other, they see the railway as a liberating space that enables autonomous expression and spontaneous interaction. By examining these contending experiences and associated sentiments, I highlight the railway as a stimulating site within which to explore the meaning and significance of urban modernity. Lastly, this thesis contributes to debate on the challenges posed by the character of contemporary social processes to anthropological research methodology. I illustrate the utility of such methods as written and photographic diaries as well as mental-mapping exercises, but primarily advocate the documentary and analytical advantages of participant observation in a mobile field-site. I assert that while participant observation poses a number of personal and professional challenges in this setting, these challenges uncover the stimulating complexity of contemporary urban life. To this end, I contest emergent academic commentary that propounds the destabilisation of anthropological techniques in what is frequently described as an equally destabilised world.

The focus of this practical theological study is the analysis of the life and worship of the Perth Asian Christian Community in the New Life City Church, where we note fast maturation of Christians with a desire to complete the Great Commission. As participant observer using the qualitative method, I was able to identify how the NLCC is wall-less by interviewing different groups within the church and two Western sample groups. To accomplish this, Chapter two analyses the Western and Asian churches’ understanding of the concepts ‘church’ and ‘church growth’. The evaluations showed a difference in understanding. This prompted an inquiry in chapter three into their understanding of the Great Commission from the Western and Asian viewpoint against the Biblical understanding thereof. The intention of NLCC groups interviewed in Chapters four to eight was to detect what they perceived as helping them mature as Christians, considering many are first-generation Christians. The groups interviewed included founder members, first-generation Christians, youth group leaders, returned NLCC missionaries and the pastor. By Chapter nine it was established that the Asian Christian understood worship in a broader context. Chapter ten summarises the interpreted data of the groups interviewed and identifies stimulants for maturation of individual Christians in a post-Christian environment. The broader understanding of worship is discussed. These guidelines form the building blocks for a practical theological theory of church growth. / Philosophy, Practical and Systematic Theology / D. Th. (Practical Theology)