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  • This web service delivers metadata for onshore active and passive seismic surveys conducted across the Australian continent by Geoscience Australia and its collaborative partners. For active seismic this metadata includes survey header data, line location and positional information, and the energy source type and parameters used to acquire the seismic line data. For passive seismic this metadata includes information about station name and location, start and end dates, operators and instruments. The metadata are maintained in Geoscience Australia's onshore active seismic and passive seismic database, which is being added to as new surveys are undertaken. Links to datasets, reports and other publications for the seismic surveys are provided in the metadata.

  • From 1995 to 2000 information from the federal and state governments was compiled for Comprehensive Regional Assessments (CRA), which formed the basis for Regional Forest Agreements (RFA) that identified areas for conservation to meet targets agreed by the Commonwealth Government with the United Nations. This CD was created as part of GA's contribution to the Central Highlands CRA. It contains final versions of all data coverages and shapefiles used in the project, Published Graphics files in ArcInfo (.gra), postscript (.ps) and Web ready (.gif) formats, all Geophysical Images and Landsat data and final versions of documents provided for publishing.

  • It is impractical for a single agency in Australia to hold responsibility for maintaining a national landslide database. Geoscience Australia has successfully demonstrated the benefits of adopting information management strategies as one solution in bringing local, regional and national scale landslide data together. In the first time that networked service oriented interoperability has been applied to a natural hazards domain, Australia now has an up-to-date central landslide database that makes full use of diverse data across three levels of government . The approach is centred upon a 'common data model' that addresses aspects of landslides captured by different agencies. The methodology brings four distinct components together: a landslide application schema; a landslide domain model; web service implementations and a user interface. Sharing and exchanging data more efficiently through an interoperable approach ensures that full value is made of available information, and that responsibility for collecting and maintaining this data is shared across all agencies. Specific-purpose data not only continues to serve the needs of individual database custodians, but also now serves a broader need. Such a system establishes the foundation for a very powerful and coordinated information resource in Australia through its ability to collate and characterise large volumes of information, and provides a suitable basis for greater investment in data collection. At a minimum the pilot project provides Australia with a framework for a centralised national landslide inventory, which can connect other available landslide databases. There is also considerable capacity for this approach to provide State Governments with a simple way to compile and maintain their own state-wide databases, and to extend the approach across other natural hazard databases and integrate data from other domains.

  • From 1995 to 2000 information from the federal and state governments was compiled for Comprehensive Regional Assessments (CRA), which formed the basis for Regional Forest Agreements (RFA) that identified areas for conservation to meet targets agreed by the Commonwealth Government with the United Nations. These 3 CDs were created as part of GA's contribution to the Tasmania CRA. CD1 contains final versions of all data coverages and shapefiles used in the project, and final versions of documents provided for publishing. CD2 contains Published Graphics files in ArcInfo (.gra), postscript (.ps) and Web ready (.gif) formats. CD3 contains all Geophysical Images and Landsat data.

  • This is a report describing a quantitative landslide risk assessment carried out in the Cairns area as part of the AGSO Cities Project. The study objective is to provide information on landslide types, conmunity vulnerability and risks to the Cairns City Council for planning and emergency management purposes. Using geological and geomorphological observations and historical information, a regional map of landslide hazards in the Cairns area has been produced. This map was entered into a geographic information system (GIS) containing comprehensive information on buildings, roads and demography.

  • Several different techniques have recently been developed to rapidly map and characterise surface landforms and materials for groundwater recharge studies in Australia. In this example, in the Darling Floodplain of western New South Wales, regional landform mapping was carried out primarily using Google Earth imagery with hill-shaded LiDAR DEM and SPOT images as visual guide and some field validation. A second, more detailed map (compiled: 1:25,000; final usable scale: 1:30,000) included landform elements such as borrow pits, individual scrolls and oxbow lakes was compiled using LiDAR DEM. Prior to landform delineation, the LiDAR DEM required levelling to eliminate tilting in the landscape, by subtracting the floodplain trend surface from the DEM. This is particularly important in floodplains and river profiles where there can be as much as a 20 m difference between the upper and lower reaches. A best-fit trend surface, which provides an average estimation of change in slope along a single plane, was required to level the data. Once the LiDAR was levelled, an interactive contour tool in ArcGIS was used to generate graphic outlines of particular features at identified breaks in elevation using hill-shading, e.g. channel banks and dune bases. Slope and 3-D DEM visualisation also facilitated identification of these breaks. Further editing was required to assemble line work, convert it into polygons, and assign landform attributes. A greater number of landform classes were developed at this finer scale than for the regional scale. In many cases, specific landforms are characterised by particular surface materials, though sediment type can vary within a single landform class. SPOT imagery has been used to delineate surface materials. In summary, the combination of the two datasets - landforms and surface materials - has allowed for the identification of potential recharge site

  • Atlas of Regolith Materials of Queensland. Companion to the 1:2,500,00 Queensland Regolith-Landform Map and GIS. Both broad and detailed regolith mapping and characterisation of materials was used to build an understanding of the regolith and its associated landforms. This state-wide overview contributes significantly to understanding the regolith and landform processes and regolith materials of Australian arid and coastal environments. This Queensland study extends seamlessly from the Northern Territory Regolith Landform Map and provides a broad-scale framework fro guiding geochemical prospecting for a wide range of minerals and materials.

  • The floodplain of the lower Balonne River is in the upper reaches of the Murray Darling Basin. The region has been extensively developed for agriculture, in particular irrigated cotton, and is highly productive. Multidisciplinary investigations to inform land management generated extensive sets of remotely sensed data including Landsat TM, airborne gamma-ray radiometrics, aerial photography, ASTER imagery, and digital elevation models. These datasets provided the basis for regolith and geomorphic mapping. The wealth of data has allowed characterisation of the lower Balonne River system which is typical of many of the dryland rivers of southern Queensland. The geomorphic map of the lower Balonne floodplain has 8 major units based on landform and geomorphic processes. Bedrock consists of the slightly deformed and extensively weathered marine Cretaceous Griman Creek Formation. Coincident with erosion and weathering, Paleogene quartz gravels were deposited and are now extensively cemented and preserved as remnants forming zones of inverted relief. Much of the present landscape consists of a series of juxtaposed depositional units that have infilled an incised valley system. The different depositional units show the palaeo-Balonne River migrating to the west. This is interpreted to be a result of tectonic depression and tilting to the west, causing avulsion and anastomosing of the palaeo-channels. The modern Balonne River system consists of a number of easily recognised segments. In the north, the modern channel is incised as a single channel. To the south the channel opens out onto an anastomosing plain with branching and reconnecting small-scale channels. Source bordering dunes, currently inactive, have also formed along the western and eastern sides of the modern river and are prominent in large dunes in the south along the present Moonie River. Their absence in older landscape elements points to increasing aridity over time in the river system.