R.J. Wasson, L. Furlonger, D. Parry, T. Pietsch, E. Valentine and D. Williams, 2009.
Geomorphology doi:10.1016/j.geomorph.2009.06.022
The Daly River occupies a mainly undisturbed large catchment in the Australian wet-dry tropics. Concerns about possible increased sediment input to the River from clearing and cropping has motivated this study of fine sediment sources.
Available through Science Direct
Showing posts with label sediment. Show all posts
Showing posts with label sediment. Show all posts
Monday, August 3, 2009
Tuesday, June 30, 2009
Aspects of Modelling the Daly River
Valentine, Eric M.
In: Proceedings of Water Down Under 2008; pages: 875-884. Lambert, Martin (Editor); Daniell, Trevor M (Editor); Leonard, Michael (Editor). Modbury, SA: Engineers Australia ; Causal Productions, 2008.
"Observations suggest that there has been considerable siltation in the estuary since 1880, and there are indications that there are instabilities in the channel plan form. The question as to whether these instabilities are driven by hydrological or anthropogenic influences from previous limited agricultural development is crucial to the decision on future development and how it should be managed. A numerical model of the hydrodynamics and morphology of the Daly River is being constructed to help determine the transport and fate of sediments on the floodplain and in the channel. This paper presents an overview of some model approaches being applied to the Daly River."
Available through Informit Engineering Collection or through the National Library.
In: Proceedings of Water Down Under 2008; pages: 875-884. Lambert, Martin (Editor); Daniell, Trevor M (Editor); Leonard, Michael (Editor). Modbury, SA: Engineers Australia ; Causal Productions, 2008.
"Observations suggest that there has been considerable siltation in the estuary since 1880, and there are indications that there are instabilities in the channel plan form. The question as to whether these instabilities are driven by hydrological or anthropogenic influences from previous limited agricultural development is crucial to the decision on future development and how it should be managed. A numerical model of the hydrodynamics and morphology of the Daly River is being constructed to help determine the transport and fate of sediments on the floodplain and in the channel. This paper presents an overview of some model approaches being applied to the Daly River."
Available through Informit Engineering Collection or through the National Library.
Tuesday, May 5, 2009
River Stability Issues in Northern Australia
Valentine, Eric M. 2006, in 30th Hydrology & Water Resources Symposium: Past, Present & Future. p. 568 -575
The Northern Territory Government plans to convert pastoral leases in the Daly River region to agriculture. Prior to this development it is important to understand the sediment dynamics of the system and the potential impacts on the river of water abstraction for irrigation. There is considerable debate about the effects that potential development of the river basin may have on the river channel. It has been suggested that there has been considerable siltation in the estuary since 1880, and recent observations of the channel indicate that there are instabilities in the channel plan-form. The question as to whether these instabilities are driven by hydrological or anthropogenic influences is crucial to the decision on future development and how it should be managed.
Source: Informit Engineering Collection.
The Northern Territory Government plans to convert pastoral leases in the Daly River region to agriculture. Prior to this development it is important to understand the sediment dynamics of the system and the potential impacts on the river of water abstraction for irrigation. There is considerable debate about the effects that potential development of the river basin may have on the river channel. It has been suggested that there has been considerable siltation in the estuary since 1880, and recent observations of the channel indicate that there are instabilities in the channel plan-form. The question as to whether these instabilities are driven by hydrological or anthropogenic influences is crucial to the decision on future development and how it should be managed.
Source: Informit Engineering Collection.
Sunday, February 22, 2009
Undular tidal bore dynamics in the Daly Estuary, Northern Australia
E. Wolanski, D. Williams, S. Spagnol and H. Chanson
Estuarine, Coastal and Shelf Science, 60, 4, 629-636, 2004
"Measurements in the macro-tidal Daly Estuary show that the presence of an undular tidal bore contributed negligibly to the dissipation of tidal energy."
doi:10.1016/j.ecss.2004.03.001
Estuarine, Coastal and Shelf Science, 60, 4, 629-636, 2004
"Measurements in the macro-tidal Daly Estuary show that the presence of an undular tidal bore contributed negligibly to the dissipation of tidal energy."
doi:10.1016/j.ecss.2004.03.001
Deposition and palaeogeography of a glacigenic Neoproterozoic succession in the east Kimberley, Australia
M. Corkeron
Sedimentary Geology, 204, 3-4, 61-82,
"Additional ice-flow data from the west Kimberley and the Daly River area of Northern Territory are consistent and record a regional palaeoice-flow direction towards the southwest."
http://www.sciencedirect.com/science/article/B6V6X-4RP0MP3-1/1/6e111b1d4ffd80756fefefd0eb6906d3
Contrasting Holocene sedimentary geologies of the Daly River, northern Australia and lower Sepik-Ramu, Papua New Guinea
J. Chappell
Sedimentary Geology, 83f, 339-358,
http://www.sciencedirect.com/science/article/B6V6X-489Y9F3-4K/1/1c8e306461b35bccc9246b5c592af164
Thursday, February 19, 2009
Sedimentation on the Daly River
L. Furlonger
Charles Darwin University
The thesis addressed the important issue of identifying the sources of sediment which could be contributing to the apparent increased sedimentation in the Daly River, which is currently being considered for future large scale agricultural development. For several years, environmentalists and recreational anglers have been raising concerns about increasing levels of sedimentation in the Daly River, leading to speculation about the effects of land clearing in the area. Lillian's research focussed on sourcing the fine sediment in the river and also contributed to quantifying sedimentation rates. Her work has provided valuable scientific input into the debate about sedimentation in the Daly River.
Charles Darwin University
The thesis addressed the important issue of identifying the sources of sediment which could be contributing to the apparent increased sedimentation in the Daly River, which is currently being considered for future large scale agricultural development. For several years, environmentalists and recreational anglers have been raising concerns about increasing levels of sedimentation in the Daly River, leading to speculation about the effects of land clearing in the area. Lillian's research focussed on sourcing the fine sediment in the river and also contributed to quantifying sedimentation rates. Her work has provided valuable scientific input into the debate about sedimentation in the Daly River.
A preliminary assessment of hillslope (Sheet and Rill) erosion and associated suspended sediment movement in the Daly River Catchment, Northern Territ
M. Dilshad
Dept of Natural Resources, Environment and the Arts.
The Sediment River Network Model (SedNet), a catchment-scale spatial planning and priority setting simulation model, was used to assess the mean annual hillslope erosion in the Daly River Catchment for the current land use scenario. SedNet was also used to assess how much of this eroded soil gets delivered to the river network, where and how much of this sediment gets deposited on the floodplains and how much is exported from the catchment.
Dept of Natural Resources, Environment and the Arts.
The Sediment River Network Model (SedNet), a catchment-scale spatial planning and priority setting simulation model, was used to assess the mean annual hillslope erosion in the Daly River Catchment for the current land use scenario. SedNet was also used to assess how much of this eroded soil gets delivered to the river network, where and how much of this sediment gets deposited on the floodplains and how much is exported from the catchment.
Wednesday, February 18, 2009
The sediment trapping efficiency of the macro-tidal Daly Estuary, tropical Australia
E. Wolanski, D. Williams and E. Hanert
Estuarine, Coastal and Shelf Science, 69, 291-298, 2006
Field studies were carried out on the water and sediment dynamics in the tropical, macro-tidal, Daly Estuary. Sediment trapping in the estuary varies seasonally and inter-annually depending on wet season flows. A large sediment bar builds up during high flow wet seasons which can cause a freshwater ponding effect which takes about 3 successive dry years to disappear.
doi:10.1016/j.ecss.2006.04.023 (Paste the doi into the resolver at http://dx.doi.org/)
Estuarine, Coastal and Shelf Science, 69, 291-298, 2006
Field studies were carried out on the water and sediment dynamics in the tropical, macro-tidal, Daly Estuary. Sediment trapping in the estuary varies seasonally and inter-annually depending on wet season flows. A large sediment bar builds up during high flow wet seasons which can cause a freshwater ponding effect which takes about 3 successive dry years to disappear.
doi:10.1016/j.ecss.2006.04.023 (Paste the doi into the resolver at http://dx.doi.org/)
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