A5027243804- Mine drainage and remediation techniques
- Soil and Water Nutrient Dynamics
- Groundwater and Isotope Geochemistry
- Groundwater flow and contamination studies
- Soil and Unsaturated Flow
- Coastal wetland ecosystem dynamics
- Water Quality and Pollution Assessment
- Fish Ecology and Management Studies
- Hydrology and Watershed Management Studies
- Marine and coastal ecosystems
- Heavy metals in environment
- Soil Carbon and Nitrogen Dynamics
- Soil Geostatistics and Mapping
- Aquatic Ecosystems and Phytoplankton Dynamics
- Tailings Management and Properties
- Arsenic contamination and mitigation
- Constructed Wetlands for Wastewater Treatment
- Flood Risk Assessment and Management
- Isotope Analysis in Ecology
- Marine Biology and Ecology Research
- Clay minerals and soil interactions
- Mining and Resource Management
- Coal and Its By-products
- Geology and Paleoclimatology Research
- Peatlands and Wetlands Ecology
The University of Adelaide
2016-2025
Lancaster University
2024
CSIRO Land and Water
2013-2018
Australian Water Quality Centre
2014-2015
Northern Territory Environment Protection Authority
2013
University of the South Pacific
2003-2004
University of Otago
2001-2004
Not only do soils provide 98.7% of the calories consumed by humans, they also numerous other functions upon which planetary survivability closely depends. However, our continuously increasing focus on for biomass provision (food, fiber, and energy) through intensive agriculture is rapidly degrading diminishing their capacity to deliver vital functions. These tradeoffs in soil functionality – increased one function at expense critical are this review. We examine how land-use change has...
Restoration of coastal wetlands has the potential to deliver both climate change mitigation, called blue carbon, and adaptation benefits communities, as well supporting biodiversity providing additional ecosystem services. Valuing carbon sequestration may incentivize restoration projects; however, it requires development rigorous methods for quantifying sequestered during wetland restoration. We describe a accounting model (BlueCAM) used within Tidal Blue Carbon Ecosystems Methodology...
Periphyton (viz. algal) growth in many freshwater systems is associated with severe eutrophication that can impair productive and recreational use of water by billions people. However, there has been limited analysis periphyton at a global level. To predict where nutrient over-enrichment undesirable occurs, we combined several databases to model map dissolved total nitrogen (N) phosphorus (P) concentrations, climatic catchment characteristics for up 1406 larger rivers were analysed between...
Estuaries in rainfall poor regions are highly susceptible to climatic and hydrological changes. The Coorong, a Ramsar-listed estuarine-coastal lagoon at the end of Murray-Darling Basin (Australia), has experienced declining ecological health over recent decades. Twenty years environmental data were analysed assess patterns drivers water quality Large areas Coorong now persistently hyper-saline (salinity >80 psu) hypereutrophic (total nitrogen, TN > 4 mg L-1, total phosphorus, TP 0.2...
The origin and nature of interparticle forces acting on colloid surfaces in natural waters has been examined using an atomic force microscope. Natural colloids were represented by a surface film iron oxide precipitated onto spherical SiO2 particles, the effects adsorbed organic matter (NOM), solution pH, ionic composition force-separation curves investigated. NOM from both riverine marine environments was strongly to surface. Under conditions low strength, dominated electrostatic repulsion...
Mangrove forests provide essential ecosystem services, but are threatened by habitat loss, effects of climatic change and chemical pollutants. Hypersalinity can also lead to mangrove mortality, although mangroves adapted saline habitats. A recent dieback event >9 ha temperate ( Avicennia marina ) in South Australia allowed evaluate the generality anthropogenic impacts on ecosystems. We carried out multidisciplinary investigations, combining airborne remote sensing with on-ground...
Estuaries are dynamic mixing zones where river water interacts with seawater, resulting in large and complex geochemical changes. How two key factors, particle aggregation pH, affect metal behaviour estuaries is reviewed integrated this paper. Riverine particles coated organic matter electrostatic repulsive forces restrict aggregation. In estuaries, increased concentrations of divalent cations reduce the between at low salinities, their rapid coagulation removal particulate-associated metals...
Management of water resources in the Murray-Darling Basin has historically focussed on security and allocation for users with competing needs. This focus was reflected seminal paper multiple risks to shared across basin by Commonwealth Scientific Industrial Research Organisation 15 years ago. That captured key concerns that were at forefront decision-makers, managers policy-makers who were, time, experiencing early impacts Millennium Drought. Water quality, then, secondary issues security....
Abstract. Ameliorating soil acidity using a combination of lime and organic amendments (OAs) can be an alternative to alone, but determining the appropriate OA rates difficult. We developed new method for calculating combined application rate OAs (wheat straw, faba bean blended poultry litter, biochar, compost) that is based on titratable alkalinity equilibrium buffer capacity (LBCeq) acidic soils. The effect calculated amendment pH was validated at water contents 60 %, 100 150 % field (FC)....
Abstract Hypersalinity is common in coastal wetlands throughout warm, tropical, and arid regions. Climate‐induced changes rainfall, sea level, anthropogenic modification to basins coastlines are likely further increase salinization these ecosystems. Yet, carbon cycling hypersaline not well understood, poorly constrained climate models. In the Coorong, a eutrophic, lagoon, recognized as internationally important under Ramsar convention, organic matter rapidly accumulates deeper areas of...
Constructed wetlands (CWs) are recognised as effective wastewater purification systems for the removal of contaminants, particularly nitrogen (N). However, performance a CW in N relies on complex biogeochemical interactions within and between various compartments. We assessed concentrations isotopic compositions multiple C species water column, sediment, plants soil riparian adjacent terrestrial zones South Australia. The major source supplied to wetland is domestic effluent delivered via...
The nature of interparticle forces acting on colloid particle surfaces with adsorbed surface films the internationally used humic acid standard material, Suwannee River Humic Acid (SHA), has been investigated using an atomic force microscope (AFM). Two were used, alumina and a hydrous iron oxide film coated onto silica particles. Adsorbed SHA dominated interactive for both types when present. At low ionic strength pH >4, curves by electrostatic repulsion electrical double layers, extent...
The recent drought in south-eastern Australia has exposed to air, large areas of acid sulfate soils within the River Murray system. Oxidation these potential release acidity, nutrients and metals. present study investigated mobilisation substances following rewetting dried with water. Trace metal concentrations were at background levels most soils. During 24-h tests, water pH was effectively buffered soil. low. Metal rapid dissolved many metals exceeded Australian quality guidelines (WQGs)...