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  • This web service provides access to groundwater raster products for the Upper Burdekin region, including: inferred relative groundwater recharge potential derived from weightings assigned to qualitative estimates of relative permeability based on mapped soil type and surface geology; Normalised Difference Vegetation Index (NDVI) used to map vegetation with potential access to groundwater in the basalt provinces, and; base surfaces of basalt inferred from sparse available data.

  • Old Bar Beach on the NSW mid-coast is an erosion hotspot with chronic dune recession rates exceeding 0.5 m/yr combined with extreme storm demand events upwards of 200 m3/m. With resultant property loss, Old Bar is a focus for active shoreline management by Midcoast Council. Here we demonstrate a new approach to distinguish the erosional effects of individual storms versus clusters of storms. We modelled the observed sediment transport inside the Old Bar coastal compartment and used probabilistic modelling to quantify both shoreline recession and storm demand. The hybrid cross shore (equilibrium type) longshore morphodynamic Shoreline Evolution (EVO) model developed by WBM BMT was setup for the Old Bar coastal compartment. A suite of probabilistic synthetic time series of waves and tides were used to force the model allowing us to make robust statistical assessments of the modelled erosion. In the subsequent analysis, erosion caused by individual storms are merged into “clustered” events if accretionary beach recovery between storms was less than 50 percent. Modelling results were in line with previous studies indicating continued recessions of 0.5m/yr and 50 year storm demands that exceed 200m3/m. Preliminary analysis of storm clustering suggests that recession and storm demand for clustered events are greater than for individual storms. These findings suggest that traditional “design storm” methods based solely on the most severe individual storm event will underestimate recession and storm demand return periods. Results will aid ongoing management and planning supported by NSW Office of Environment and Heritage and Midcoast Council to better understand the nature of the coastal hazards that continue to place some beachfront properties at risk. The Old Bar study was undertaken for the Bushfire and Natural Hazards CRC project ‘Resilience to clustered disaster events on the coast - storm surge’.]

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    Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. This Ngururrpa Gravity Survey P201560 Spherical Cap Bouguer Anomaly 267GU 1VD is the first vertical derivative of the spheical cap Bouguer anomaly grid for the Ngururrpa Gravity Survey (P201560). This gravity survey was acquired under the project No. 201560 for the geological survey of WA. The grid has a cell size of 0.00466 degrees (approximately 500m). A total of 4965 gravity stations at 2500m spacing were acquired to produce this grid. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.

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    Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This Esperance Gravity Complete Spherical Cap Bouguer Grid Geodetic is a complete spherical cap Bouguer anomaly grid for the Esperance Gravity Survey 2013 (P201361). This gravity survey was acquired under the project No. 201361 for the geological survey of WA. The grid has a cell size of 0.00489 degrees (approximately 498m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 7892 gravity stations were acquired to produce this grid.

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    Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This Webb Gravity Survey (P200660), Bouguer 1VD grid is a first vertical derivative of the Bouguer anomaly grid for the Webb Gravity Survey (P200660) survey. This gravity survey was acquired under the project No. 200660 for the geological survey of WA. The grid has a cell size of 0.0047 degrees (approximately 502m). A total of 4092 gravity stations were acquired to produce the original grid. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid.

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    Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This Paterson complete Bouguer anomaly grid geodetic is a complete Bouguer anomaly grid for the Paterson - WA Gravity Survey (P4025). This gravity survey was acquired under the project No. 4025 for the geological survey of WA. The grid has a cell size of 0.0037 degrees (approximately 396m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of None gravity stations were acquired to produce this grid.

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    Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This West Musgrave Gravity Bouguer Anomaly Grid geodetic is a complete Bouguer anomaly grid for the West Musgrave Gravity 2008 WA (P200860). This gravity survey was acquired under the project No. 200860 for the geological survey of WA. The grid has a cell size of 0.0046 degrees (approximately 485m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 4027 gravity stations were acquired to produce this grid.

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    The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This radiometric uranium grid has a cell size of 0.00096 degrees (approximately 104m) and shows uranium element concentration of the Hodgkinson-Georgetown Block C, QLD, 2000, Prospectivity Plus Init. in units of parts per million (or ppm). The data used to produce this grid was acquired in 2000 by the QLD Government, and consisted of 72706 line-kilometres of data at a line spacing between 200m and 400m, and 80m terrain clearance.

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    The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This radiometric thorium grid has a cell size of 0.00021 degrees (approximately 21m) and shows thorium element concentration of the Fowler's Gap, Corona, NSW, Broken Hill Exploration Init., 1995 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1995 by the NSW Government, and consisted of 47943 line-kilometres of data at a line spacing between 100m and 200m, and 60m terrain clearance.

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    Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This p200861 Windimurra with infill complete spherical cap Bouguer267 1VD is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the Windimurra Gravity Survey (P200861). This gravity survey was acquired under the project No. 200861 for the geological survey of WA. The grid has a cell size of 0.0046 degrees (approximately 480m). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. A total of 6042 gravity stations at a spacing between 1600m and 2500m were acquired to produce this grid.