The dataset was derived by the Bioregional Assessment Programme from multiple source datasets. The source datasets are identified in the Lineage field in this metadata statement. The processes undertaken to produce this derived dataset are described in the History field in this metadata statement.
Contains the files and R scripts used for creating interpolated surfaces of depth to groundwater and contour maps of piezometric surfaces for dry (200 - 2007) and wet (2008 - 2012) periods in the Bremer, Clarence Lockyer, Logan-Albert and Richmond alluvial systems. Piezometric surfaces and depth to groundwater surfaces are created using ordinary kriging in R. The data used come from the bores in the QLD and NSW groundwater databases (see data lineage).
Groundwater hydraulic head data from the NSW and QLD databases (see data lineage) was extracted by selecting only those data collected between 2000 and 2012 and that fell within the boundary shapefiles for the alluvial bodies. Elevation data from the DEM was appended to the spatial locations for each groundwater bore in the dataset. Ordinary kriging was then performed in R to create interpolated surfaces for depth to groundwater and piezometric surfaces. The kriging makes use of the digital elevation model as a covariate for aiding prediction. The R scripts output pdf maps of the surfaces for each of the following alluvial systems: Bremer, Clarence, Lockyer, Logan-Albert and Richmond. Maps are produced for for the dry period (2000 - 2007) and wet period (2008 - 2012) and show the predicted surface in addition to the prediction standard deviation.
The R script also outputs the rasters used to create these maps to .asc files (ascii grids). There are four such ascii grids for the entire alluvium:
PiezometricSurface_Dry.asc (the estimated piezometric surface for all of the alluvium in the dry years which has been clipped to shapefiles to produce each of the .pdf maps)
PiezometricSurface_SD_Dry.asc (the estimated standard deviation of the piezometric surface for all of the alluvium in the dry years which has been clipped to shapefiles to produce each of the .pdf maps)
PiezometricSurface_Wet.asc (the estimated piezometric surface for all of the alluvium in the wet years which has been clipped to shapefiles to produce each of the .pdf maps)
PiezometricSurface_SD_Wet.asc (the estimated standard deviation of the piezometric surface for all of the alluvium in the wet years which has been clipped to shapefiles to produce each of the .pdf maps)
Bioregional Assessment Programme (2014) CLM - Interpolated piezometric surfaces for Alluvium. Bioregional Assessment Derived Dataset. Viewed 28 September 2017, http://data.bioregionalassessments.gov.au/dataset/da04bc6a-b2ad-427f-a434-643ad6006ea0.
Derived From CLM - Bore water level QLD
Derived From Qld 100k mapsheets - Warwick
Derived From Qld 100K mapsheets - Helidon
Derived From Qld 100K mapsheets - Ipswich
Derived From Qld 100K mapsheets - Toowoomba
Derived From CLM - DEM in ascii format
Derived From CLM - Geology NSW & Qld combined v02
Derived From Natural Resource Management (NRM) Regions 2010
Derived From Qld 100k mapsheets - Kingaroy
Derived From CLM - Extent of Bremer river and Warrill creek alluvial systems
Derived From CLM - Extent of Richmond river alluvial system May 6th 2014
Derived From GEODATA TOPO 250K Series 3, File Geodatabase format (.gdb)
Derived From GEODATA TOPO 250K Series 3
Derived From NSW Catchment Management Authority Boundaries 20130917
Derived From Geological Provinces - Full Extent
Derived From CLM - Extent of Richmond river alluvial system February 3rd 2015
Derived From Qld 100K mapsheets - Allora
Derived From Qld 100K mapsheets - Jandowae
Derived From Bioregional Assessment areas v03
Derived From Qld 100K mapsheets - Esk
Derived From CLM - Extent of Logan and Albert river alluvial systems
Derived From Qld 100K mapsheets - Mount Lindsay
Derived From CLM - Qld Surface Geology Mapsheets
Derived From Clarence-Moreton SEEBASE & Structural GIS Project data.
Derived From CLM - NSW Surface Geology Mapsheets in the Clarence-Moreton bioregion
Derived From CLM - Extent of Clarence River alluvial systems
Derived From Hydstra Groundwater Measurement Update - NSW Office of Water, Nov2013
Derived From Qld 100k mapsheets - Beenleigh
Derived From Qld 100K mapsheets - Caboolture
Derived From CLM - Extent of Lockyer Creek alluvial system
Derived From Qld 100k mapsheets - Murwillumbah
Derived From QLD Department of Natural Resources and Mines Groundwater Database Extract 20142808
Derived From Bioregional Assessment areas v01
Derived From Bioregional Assessment areas v02
Derived From Qld 100K mapsheets - Inglewood
Derived From Qld 100K mapsheets - Oakey
Derived From Geoscience Australia, 1 second SRTM Digital Elevation Model (DEM)
Derived From CLM - Bore water level NSW