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dc.contributor.authorIssa, Sanaa
dc.date.accessioned2019-08-15
dc.date.available2019-08-15
dc.date.issued2018-11-14
dc.identifier.urihttp://hdl.handle.net/2123/20915
dc.description.abstractIn South Western Sydney (which encompasses the study area), New South Wales, Australia, salinity is a major emerging urban problem and is primarily related to rising groundwater level. This eight-chapter thesis focuses on the factors influencing salinity and its processes in the Mount Annan, Currans Hills and Narellan Vale areas, and investigates both the present three-dimensional (3-D) groundwater flow pattern and that expected to occur in the area as a result of future urban expansion. The chemical and physical analyses carried out on the soil samples collected from the study areas, and the groundwater level and electrical conductivity data have been interpreted in a comprehensive integrated manner to identify factors and processes influencing salinity, and to develop a reliable and detailed hydrogeological conceptual model. A new method has been developed for groundwater recharge estimation for unconfined aquifers under the assumption that groundwater recharge is solely due to rainfall. The method is capable of estimating groundwater recharge and drainage and predicting groundwater levels from time series of observed groundwater level data and rainfall events. The method can produce non-unique solution. Despite the non-uniqueness, the estimated recharges do not suffer large variations. A 3-D groundwater flow model has been developed by calibrating the measured groundwater level data using the MODFLOW code. The groundwater flow maps constructed from the 3-D calibration results have shown that the flow pattern is collectively controlled by topography and recharge, and varies in space and time, which likely suggests that the salinisation process, which is influenced by the lateral and vertical groundwater movements, varies in space and time. Analysis has revealed that future urbanisation likely results in changes in the subsurface water balance. Conclusions and suggested avenues for future research are drawn in Chapter 8.en_AU
dc.publisherUniversity of Sydneyen_AU
dc.publisherFaculty of Scienceen_AU
dc.publisherSchool of Life and Environmental Sciencesen_AU
dc.rightsThe author retains copyright of this thesis. It may only be used for the purposes of research and study. It must not be used for any other purposes and may not be transmitted or shared with others without prior permission.en_AU
dc.subjectGroundwater flowen_AU
dc.subjectsalinisation processesen_AU
dc.subjectWestern Sydneyen_AU
dc.titleHydrogeologic and 3-D Shallow Groundwater Flow Integrated Study and Salinisation Processes with Some Areas at Western Sydney, New South Wales, Australiaen_AU
dc.typePhD Doctorateen_AU
dc.type.pubtypeDoctor of Philosophy Ph.D.en_AU
dc.description.disclaimerAccess is restricted to staff and students of the University of Sydney . UniKey credentials are required. Non university access may be obtained by visiting the University of Sydney Library.en_AU


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