Dynamics of Suppressed Mixing Regimes in Australian Rivers. This study aims to further the fundamental science of turbulent mixing in the context of flow in Australian rivers. The focus is on prolonged low flow conditions which when coupled with warm surface temperatures cause the water column to become thermally stratified which then suppresses turbulent mixing. The extreme scale of the river systems has made investigating the true dynamics of the strongly stratified mixing regimes particularly ....Dynamics of Suppressed Mixing Regimes in Australian Rivers. This study aims to further the fundamental science of turbulent mixing in the context of flow in Australian rivers. The focus is on prolonged low flow conditions which when coupled with warm surface temperatures cause the water column to become thermally stratified which then suppresses turbulent mixing. The extreme scale of the river systems has made investigating the true dynamics of the strongly stratified mixing regimes particularly challenging. By taking world first in-situ measurements of turbulent mixing and undertaking high resolution numerical simulations this study will provide definitive data which will allow correct characterization of the mixing regimes and how they are associated with river flow conditions.Read moreRead less
Tracking flood waters over Australia using space gravity data. This project aims to assess the utility of near-real-time data from the currently operating space gravity satellite mission to quantify and track flood waters in Australia. Through analysis of the satellite data and fusion of observed signals with rainfall, river flows and conventional hydrological modelling, it expects to create new knowledge of soil moisture and movement of flood waters. Expected outcomes include a capability to im ....Tracking flood waters over Australia using space gravity data. This project aims to assess the utility of near-real-time data from the currently operating space gravity satellite mission to quantify and track flood waters in Australia. Through analysis of the satellite data and fusion of observed signals with rainfall, river flows and conventional hydrological modelling, it expects to create new knowledge of soil moisture and movement of flood waters. Expected outcomes include a capability to improve hydrological models by including the information of water signals obtained from the near-real-time observations. This should provide significant benefits such as more accurate land saturation maps and better predictions of runoff and flood risk.Read moreRead less
Thermal stratification, overturning and mixing in riverine environments. Thermal stratification is common in Australia's rivers due to our hot, drought-prone climate and high human demands relative to available supply, which has led to a significant reduction in flows relative to natural levels. Thermal stratification inhibits mixing, creating stagnant conditions characterised by low oxygen levels and increased concentrations of contaminants, leading to algal blooms, fish kills and systemic dama ....Thermal stratification, overturning and mixing in riverine environments. Thermal stratification is common in Australia's rivers due to our hot, drought-prone climate and high human demands relative to available supply, which has led to a significant reduction in flows relative to natural levels. Thermal stratification inhibits mixing, creating stagnant conditions characterised by low oxygen levels and increased concentrations of contaminants, leading to algal blooms, fish kills and systemic damage to ecosystems. The aim of this project is to develop predictive models for the effects of physical processes such as night-time cooling, wind, turbulence and currents on riverine thermal stratification. This is expected to enable a more accurate determination of the flow rates required to maintain the health of our river systems.Read moreRead less
Rupture: nature-society transformations in mainland Southeast Asia. This project aims to understand the nexus between intense, cumulative processes of socio-ecological change and emerging forms of social agency. Three case studies of Cambodian and Vietnamese dams, and a review of Thai-Lao cases, will reveal local and civil society responses to nature-society rupture and how these responses affect the region, inform advances in environmental change management, and be relevant to Australia's secur ....Rupture: nature-society transformations in mainland Southeast Asia. This project aims to understand the nexus between intense, cumulative processes of socio-ecological change and emerging forms of social agency. Three case studies of Cambodian and Vietnamese dams, and a review of Thai-Lao cases, will reveal local and civil society responses to nature-society rupture and how these responses affect the region, inform advances in environmental change management, and be relevant to Australia's security policies.Read moreRead less
Natural resources and ecosystem services in productivity measurement. This project aims to understand sources of productivity growth through addressing theoretical and practical problems in the economics of natural resources and ecosystem services. It will study the valuation of non-renewable resources and ecosystem services, acknowledging their contributions to economic activity and the effect on national income from their depletion and degradation. It will develop approaches to incorporating n ....Natural resources and ecosystem services in productivity measurement. This project aims to understand sources of productivity growth through addressing theoretical and practical problems in the economics of natural resources and ecosystem services. It will study the valuation of non-renewable resources and ecosystem services, acknowledging their contributions to economic activity and the effect on national income from their depletion and degradation. It will develop approaches to incorporating natural resource depletion and degradation into productivity analysis with the aim of better informing environmental, innovation and industry policy.Read moreRead less
Linking phytoplankton to fisheries using zooplankton size spectra. This project aims to develop innovative numerical methods to understand the dynamics, carbon export, and trophic structure of zooplankton. The trophic links between phytoplankton, zooplankton and fisheries are unknown. The size- frequency distribution of zooplankton (size spectrum) is an innovative method for estimating their growth, predation and production as food for fish. Analysis of a global synthesis of zooplankton size dis ....Linking phytoplankton to fisheries using zooplankton size spectra. This project aims to develop innovative numerical methods to understand the dynamics, carbon export, and trophic structure of zooplankton. The trophic links between phytoplankton, zooplankton and fisheries are unknown. The size- frequency distribution of zooplankton (size spectrum) is an innovative method for estimating their growth, predation and production as food for fish. Analysis of a global synthesis of zooplankton size distributions from tropical to polar environments are expected to reveal these vital rates of pelagic ecosystems. The zooplankton rates will reveal, for the first time, the link between phytoplankton and fisheries, and will significantly improve ecosystem models and global assessments of environmental change.Read moreRead less
Biosecurity or Trade Barrier? The Economic Costs of Quarantine. Agricultural, fishing and forestry groups are united in supporting strict biosecurity measures, such as quarantine, in order to prevent any possibility of the importation of diseases. However, the importation of certain products from "diseased" countries does not necessarily mean that the disease will also be imported, and even if imported it may not result in the destruction of the local industry. The "diseased" countries obviousl ....Biosecurity or Trade Barrier? The Economic Costs of Quarantine. Agricultural, fishing and forestry groups are united in supporting strict biosecurity measures, such as quarantine, in order to prevent any possibility of the importation of diseases. However, the importation of certain products from "diseased" countries does not necessarily mean that the disease will also be imported, and even if imported it may not result in the destruction of the local industry. The "diseased" countries obviously remain competitive if they are able to export the products. Foreign quarantine restrictions are restricting Australia's access to international markets. The costs to consumers of the current zero-tolerance policy has not been quantified. The costs may indeed exceed the benefit.Read moreRead less
Balancing the risk of harm with productivity in the mercurial firm: economic theory and applications to Australian policy. Australia has had at least one significant chemical spill per month for the last 30 years. While the Longford disaster fades from the news, James Hardy's asbestos problem fills its place. This project will develop a general conceptual framework in which to analyse the economics of risky firms. The framework will be used to evaluate Australian, International, and alternative ....Balancing the risk of harm with productivity in the mercurial firm: economic theory and applications to Australian policy. Australia has had at least one significant chemical spill per month for the last 30 years. While the Longford disaster fades from the news, James Hardy's asbestos problem fills its place. This project will develop a general conceptual framework in which to analyse the economics of risky firms. The framework will be used to evaluate Australian, International, and alternative policies. The end benefit to Australia will be an improvement in policy toward firms that cause accidents.Read moreRead less
Novel water treatment processes. The objective of this project is the discovery of novel methods for the treatment and reuse of water for both industrial and household applications. Improved treatment systems with the potential for water reuse offer significant improvements to our overall water management potential. The first part of the project is designed to focus on the study of hot bubble column evaporators for solute decomposition, sterilisation and the de-watering of heavily contaminated i ....Novel water treatment processes. The objective of this project is the discovery of novel methods for the treatment and reuse of water for both industrial and household applications. Improved treatment systems with the potential for water reuse offer significant improvements to our overall water management potential. The first part of the project is designed to focus on the study of hot bubble column evaporators for solute decomposition, sterilisation and the de-watering of heavily contaminated industrial wastewater. The second part would be based on the study of a suitable depth filter medium for the treatment of partially treated household sewage water. This is designed to form part of an on-site household sewage water treatment and reuse system which is currently being developed.Read moreRead less