Lake Burragorang, the focus of this thesis, is the main water supply source for the large population of Sydney and is a major source for the Blue Mountains residents. This study was aimed to evaluate the distribution of heavy metals and their speciation in sediments of Lake Burragorang. The principal focus is on the study of heavy metal pollution and their bioavailability to the aquatic system. Five-step sequential extraction procedure was employed to assess different geochemical forms of certain metals in sediment grabs of Lake Burragorang. This is the first study to report metal speciation data for Lake Burragorang sediments. No significant spatial variations were observed in the speciation trends. The variation in metals and nutrients in the sediments with age was established and has been compared with published historical record, rainfall records and bushfire data. / Master of Engineering (Hons)

This thesis presents analysis of the hydrodynamic and sedimentation changes of the Causeway Lake, Queensland. It was created in 1939 when a causeway and bridge construction was built across the estuary entrance. Since the construction, significant sediment retention has occurred in the lake. The sediment study presented in this thesis was undertaken based on historical data, field data measurement and numerical modelling, supported by theoretical analysis. Based on bathymetry data for the period from 1986 and 2003, an average of 2500 m3/year of sediment has settled in the estuary. To verify the sources of sedimentation, field measurements were undertaken at selected sections at two upstream boundaries (Mulambin and Shoal Creeks), and at the downstream boundary under the bridge. Four sets of field measurements with tidal elevation up to 4.5 m (0.8 m above the bridge sill) were analysed. Results showed that sediment transport in from the sea side was about 1050 m3/year and from the catchments area was in the order of 1100 m3/year (wash load was not included). Implementation of numerical modelling using RMA required calibration using field data. The predicted sediment transport was in order of 2900 m3/year. The calibrated model was used to simulate the sedimentation pattern for the next 10 years. Four scenarios were analysed, and the resulting recommendation was to dredge out about 141,000 m3 sediment from the Mulambin Creek branch area. Other solutions were also suggested: improvement of lake management and possibility to raise the sill level (water gate).

Thesis (Ph. D.)--Lehigh University, 2003. / Includes vita. Includes bibliographical references (leaves 160-174).

Thesis (M.Sc.)--Memorial University of Newfoundland, 2002. / Bibliography: leaves 98-101. Also available online.

This report examines the marketing activities of the nonprofit organization, Protect Lake Travis Association based in Austin, Texas, with a mission to protect Lake Travis and its watershed from any events and conditions that could negatively affect the natural beauty and quality of the area. In the summer of 2011, Protect Lake Travis Association was in need of foundational marketing materials and recommendations of marketing activities that they can implement. This report incorporates qualitative survey research, execution of creative work that includes branding and an organizational brochure, and a focus on marketing recommendations for Protect Lake Travis Association. / text

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Histories o f childhood and youth have generally focused upon social policy toward young people. This dissertation chronicles the actual experiences of youth growing up in and around Williams Lake in the Cariboo-Chilcotin region of British Columbia, a "western" community surrounded by open spaces, ranches, and Aboriginal reservations. Williams Lake underwent economic, demographic, spatial as well as social transformation in the first three decades following the Second World War. Forty-three oral interviews with two sets o f subjects who were adolescents in the study area furnished the bulk of the primary evidence. Most of the first "generation" were bom in the Great Depression and were teens sometime between 1945 and 1955. The second generation are "baby-boomers" bom between 1947 and 1962 who were teens between 1965 and 1975. This joint narrative details select aspects o f their lives at school, at paid and unpaid labour, with friends, and at leisure. It suggests changes and continuities in the experience of local youth between 1945 and 1975. First generation non-Aboriginal subjects grew up with a somewhat coherent peer group albeit with relatively little physical and social contact with Aboriginal youth. Gendered domestic labour around home and property honed work skills and dispositions from an early age. The emergence of local sawmills greatly expanded work options for males but not females. Males also enjoyed comparatively more spatial and temporal freedom throughout their youth. Second generation subjects grew up in a context of greater urbanization and access to mass culture. The merger of regional youth in the high school along with natural population growth, demographic change including the enrollment of first Aboriginal and then Indo-Canadian youth encouraged factions as well as cultural gulfs among youth in the school and community. Their leisure was comparatively less divided, at least on the basis of gender, as many non-Aboriginal parents eased traditional restrictions upon daughters. With notable exceptions this generation contributed less labour to their household and directed part- and full-time earnings into satisfying their own personal interests. The author suggests the pattern of youths' recreational use of hinterlands during the period reflects common practice in many Canadian communities located in similar rural and isolated settings. He illustrates how factors such as family affluence and circumstances, gender, "race" and ethnicity continued to mediate the experience of growing up in this post-war period. He concludes many more local accounts of the experiences of youth are needed before any attempt is made at an inclusive national historical synthesis of growing up in Canada after the Second World War.

A static phosphorus loading model, as proposed by G.K. Nurnberg (1998, Limnology and Oceanography, 43, 1544-1552) is applied to Langford Lake, BC to determine the likely sources of phosphorus entering the lake and to predict the consequences of further urbanizing the watershed. Export coefficients are calibrated to local conditions by assuming that the phosphorus concentration of the epilimnion during the spring and early summer is explained by only external loading. Internal loading amounts, as quantified by examining the lake's phosphorus profile, are compared against estimates derived from sediment analysis. Internal loading is determined to be the largest contributor of phosphorus to the lake (69%), while septic fields are the greatest external contributor (10%). It is found that the anticipated increase in the phosphorus load, resulting from urban expansion, can be largely offset by removing the remaining septic fields within the watershed and using low-impact design features in all new developments.

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