A5086471303- Soil erosion and sediment transport
- Hydrology and Sediment Transport Processes
- Hydrology and Watershed Management Studies
- Aeolian processes and effects
- Rangeland Management and Livestock Ecology
- Flood Risk Assessment and Management
- Soil Moisture and Remote Sensing
- Soil and Unsaturated Flow
- Fish Ecology and Management Studies
- Soil and Water Nutrient Dynamics
- Climate change and permafrost
- Water Quality and Pollution Assessment
- Geological formations and processes
- Ecology and Vegetation Dynamics Studies
- Remote Sensing and LiDAR Applications
- Pasture and Agricultural Systems
- Rangeland and Wildlife Management
- Geophysics and Gravity Measurements
- Precipitation Measurement and Analysis
- Underwater Vehicles and Communication Systems
- Soil and Environmental Studies
- Astrophysics and Cosmic Phenomena
- Coastal wetland ecosystem dynamics
- Groundwater flow and contamination studies
- Water Quality Monitoring and Analysis
Commonwealth Scientific and Industrial Research Organisation
2005-2025
CSIRO Land and Water
2009-2021
James Cook University
2017
Abstract This paper highlights the relevant issues influencing amount and arrangement of ground cover in savanna rangelands Australia, presents field measurements from hillslope scale flumes, which demonstrate how runoff sediment loss vary with spatial patterns cover. Hillslopes relatively high mean cover, but small patches bare vegetation, are shown to have between 6 9 times more runoff, up 60 than similar hillslopes that do not contain patches. The majority lost is composed fine...
Abstract The cosmic‐ray probe (CRP) provides continuous estimates of soil moisture over an area ∼30 ha by counting fast neutrons produced from cosmic rays which are predominantly moderated water molecules in the soil. This paper describes setup, measurement correction procedures, and field calibration CRPs at nine locations across Australia with contrasting type, climate, land cover. These probes form inaugural Australian CRP network, is known as CosmOz. measurements require neutron count...
Abstract Drainage network extension in semi‐arid rangelands has contributed to a large increase the amount of fine sediment delivered coastal lagoon Great Barrier Reef, but gully erosion rates and dynamics are poorly understood. This study monitored annual erosion, deposition vegetation cover six gullies for 13 years, granite‐derived soils tropical Burdekin River basin. We also further 11 three nearby catchments 4 years investigate effects grazing intensity. Under livestock grazing,...
Abstract Fallout radionuclides (FRNs) 137 Cs and 210 Pb are well established as tracers of surface sub‐surface soil erosion contributing sediment to river systems. However, without additional information, it has not been possible distinguish sources. Here, we use the FRN 7 Be (half‐life 53 days) in combination with excess trace form three large catchments eastern Australia; Logan River (area 3700 km 2 ), Bowen (9400 ) Mitchell (4700 ). We show that Cs, can discriminate horizontally aligned...
Excess sediments from agricultural areas are having a detrimental impact on the Great Barrier Reef, and threaten long-term viability of rangeland grazing. Changes to grazing management have been promoted as mechanism for reducing excess sediment loss grazed rangelands. This paper summarises results 10-year study (2002–11) property in Burdekin catchment that investigated role reduced stocking rates rotational wet season resting hill-slope runoff yields. Ground cover pasture biomass were...
Abstract The semitheoretical universal calibration function (UCF) for estimating soil moisture using cosmic‐ray neutron sensors was tested by comparing to field measurements made with the same detector across a range of climates, soil, latitude, altitude, and biomass. There strong correlation between intensity total amount hydrogen at each site; however, relationship differed from that predicted UCF. A linear fit explained 99% observed variation provides robust empirical means estimate other...
Abstract. Soil moisture plays a critical role in land surface processes and as such there has been recent increase the number resolution of satellite soil observations development process models with ever increasing resolution. Despite these developments, validation calibration products limited because lack on corresponding scales. A recently developed mobile monitoring platform, known rover, offers opportunities to overcome this scale issue. This paper describes methods, results testing...
This manuscript describes the collation of available water quality data from freshwater reaches surface streams within Great Barrier Reef catchment area, northeastern Australia. compilation represents one most comprehensive online datasets for historical tropical and subtropical around world. We document criteria selection associated publications as well processes cleaning used to produce a qualitative assessment datasets. The final includes 41 individual that collectively report 466 sites...
Abstract Catchment sediment budget models are used to predict the location and rates of bank erosion in tropical catchments draining Great Barrier Reef lagoon, yet reliability these predictions has not been tested due a lack measured data. This paper presents results 3 year field study examining channel change on Daintree River, Australia. Three different methods were employed: (1) pins assess influence riparian vegetation erosion, (2) bench‐marked cross‐sections evaluate annual changes...
Abstract The ability of wetlands to improve the quality water has long been recognized and led proliferation as a means treat diffuse point source pollutants from range land uses. However, much existing research undertaken in temperate climates with paucity information on effectiveness wetlands, particularly natural tropical regions. This paper contributes addressing this issue by presenting comprehensive measurement based assessment potential for naturally occurring riverine wetland...
Current estimates of sediment and nutrient loads from the Tully–Murray floodplain to Great Barrier Reef lagoon are updated by taking explicit account flood events. New discharge that include over-bank flows combined with direct measurements concentrations in waters calculate delivered ocean during 13 floods occurred between 2006 2008. Although absolute were quite low, large volume water discharged means they make a contribution (30–50%) marine load. By not accounting for correctly, previous...
Abstract Gully rehabilitation can contribute to catchment management by stabilizing erosion and reducing downstream sediment yields, yet the globally observed responses are variable. Developing technical basis for gully establishing guidelines application requires studies that evaluate individual measures in specific environments. An eight‐year field experiment was undertaken yield vegetation several measures. The aimed reduce surface runoff into head cuts, trap on floors increase cover...
Abstract Wetlands in the coastal catchments adjacent to Great Barrier Reef lagoon play an important role local hydrological processes and provide ecological habitats for terrestrial aquatic species. Although many wetlands have been removed or degraded by agricultural expansion, there is now great interest their protection restoration as ecosystems potential filters of pollutant runoff. However, filtering capacity tropical largely unknown, so current study was established quantify water,...
Millions of dollars are being spent on gully rehabilitation to help reduce excess fine sediment delivery the Great Barrier Reef (GBR). There is an urgent need for (i) prioritisation active gullies and (ii) development methodologies inform effectiveness remediation. In this study we analyse DEMs Difference derived from 0.5 m resolution 2–3 year interval multi-temporal LiDAR data collected pre post at three variable morphologies in Burdekin catchment. Our analysis indicates that highest annual...
This paper investigates a novel technique based on Fuzzy C means (FCM) algorithm and Adaptive Neuro-Fuzzy Inference System (ANFIS) to estimate soil moisture using cosmic ray probes deployed across Australia. These are brand new sensing technology still being evaluated. Preliminary results indicate ANFIS is able with 90% accuracy.