Hydro-sedimentology of the Johnstone River estuary |
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Authors: | Arakel A. V. Hill C. M. Piorewicz J. Connor T. B. |
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Affiliation: | (1) Department of Applied Geology, Queensland University of Technology, G.P.O. Box 2434, 4000 Brisbane, Queensland, Australia;(2) Department of Engineering, Capricornia Institute, 4702 Rockhampton, Queensland, Australia;(3) Cameron McNamara Pty. Ltd., P.O. Box 1197, 4064 Milton Central, Queensland, Australia |
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Abstract: | This paper examines the physical consequences of increased catchment sediment yields on the sediment budget and the hydrodynamic setting of the South Johnstone River estuary in North Queensland. A combined study involving hydrological monitoring, assessment of sediment sources, estimation of riverine sediment budget and hydro-sedimentological numerical modelling for estuarine sediment transport is currently underway. Initial field and laboratory observations indicate that the sediment delivery from highly erosion-prone sugar cane cultivations in the tropical catchment has increased dramatically during the last 10 years. This has subsequently given rise to elevated flood levels in both the lower and upper catchment areas, as well as significant modifications to the river bed morphology. |
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Keywords: | estuaries mathematical modelling sedimentation soil erosion sugarcane |
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