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dc.contributor.advisorSheldon, Fran
dc.contributor.authorWoodward, Kenneth Benjamin
dc.date.accessioned2018-01-23T02:27:47Z
dc.date.available2018-01-23T02:27:47Z
dc.date.issued2015
dc.identifier.doi10.25904/1912/1195
dc.identifier.urihttp://hdl.handle.net/10072/366245
dc.description.abstractMore than 45 000 dams, with the capacity to hold 15% of global river runoff, have been constructed on rivers around the world for diverse purposes including water supply, irrigation water and power. The effects of these dams on river flow are diverse and dependent upon the purpose of the dam; some dams stabilise flow to improve transportation, water access and agricultural productivity, while dams such as those for power generation create flow regimes that vary drastically over a period of hours. The benefits of regulating river flow for human needs comes with ecological costs to riverine ecosystems including local extinctions, depletion of ground water, declines in water quality and water availability. The specific ecological costs of flow regulation are dependent on how the new, regulated, flow regime differs from the natural flow regime of a river system. Regulation of flow in Australia’s lowland rivers has been undertaken to suppress the inherent flow variability and dampen flow extremes, largely to improve water access for floodplain based irrigated agriculture. Flow regulation in these systems captures moderate sized flows, releasing this stored water during periods of natural low flow. This stabilising of river flow has resulted in an increase in the abundance of introduced species and a decline in the diversity of native fish, macroinvertebrate, and littoral plant communities along with altering river channel geomorphology and decreasing water quality. These declines may be partly caused by the loss of moderate sized flows reducing lateral hydrological connectivity between terrestrial and aquatic ecosystems. In an attempt to reverse this effect, flow rules that are designed to increase the frequency of small to moderate sized flow pulses, which are mostly contained within the channel, have been introduced in many of Australian’s lowland rivers.
dc.languageEnglish
dc.publisherGriffith University
dc.publisher.placeBrisbane
dc.rights.copyrightThe author owns the copyright in this thesis, unless stated otherwise.
dc.subject.keywordsAustralian Lowland River
dc.subject.keywordsRiver ecology
dc.subject.keywordsDams
dc.subject.keywordsRiver flow
dc.subject.keywordsSediment transportation
dc.titleThe Storage, Mobilisation and Metabolism of Soil Nutrients and Carbon in an Australian Lowland River
dc.typeGriffith thesis
gro.facultyScience, Environment, Engineering and Technology
gro.rights.copyrightThe author owns the copyright in this thesis, unless stated otherwise.
gro.hasfulltextFull Text
dc.contributor.otheradvisorBurford, Michele
dc.contributor.otheradvisorMitrovic, Simon
dc.rights.accessRightsPublic
gro.identifier.gurtIDgu1455493247552
gro.source.ADTshelfnoADT0
gro.source.GURTshelfnoGURT
gro.thesis.degreelevelThesis (PhD Doctorate)
gro.thesis.degreeprogramDoctor of Philosophy (PhD)
gro.departmentGriffith School of Environment
gro.griffith.authorWoodward, Ben


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