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Namoi Leapfrog geological model


This dataset was supplied to the Bioregional Assessment Programme by a third party and is presented here as originally supplied. The metadata was not provided by the data supplier and has been compiled by the programme based on known details.

The Namoi Leapfrog geological model developed by CDM Smith for the future Santos' Gunnedah Coal Seam Gas Project (NTEC, 2013) using the software package Leapfrog Hydro™. The geological model was available to the Namoi subregion Assessment team and is considered to be fit for purpose as the basis for the Namoi geological model, developed for the Namoi BA programme.

Dataset History

This Namoi Leapfrog Model was created by CDM Smith and obtained from Santos Ltd for use in the Namoi Bioregional Assessment.

There is little documentation available for the geological model, however some is available as part of the Groundwater Impact Assessment for the Gunnedah Coal Seam Gas Project (NTEC, 2013). Each geological layer in the CDM Smith model is represented as a three-dimensional layer that can be continuous or discontinuous within the geological model domain. The thickness of layers and contact between the layers are modelled by the Leapfrog™ software based on interpolation and extrapolation of the input data and the types of stratigraphic relationships assigned in Leapfrog™. The model is discretised into 500 m x 500 m model cells. The thickness of each layer in each cell represents the mean formation thickness at that location. The model domain extends over approximately 53,200 km2 from the Hunter-Mooki Thrust Fault System in the east, to the extent of the Gunnedah Basin units in the south and north, which is outside the boundary of the Namoi subregion. The western boundary of the model domain is marked by the north-westerly groundwater flow direction in the Surat Basin.

Sources of data for the model include drilling logs from Santos and the NSW Department of Primary Industries Digital Imaging of Geological System (DIGS®) database, stratigraphic surfaces from the Upper and Lower Namoi groundwater models (McNeilage (2006) and Merrick (2001) respectively), the Gunnedah Bowen Study SEEBASE™ and Santos proprietary mapping of Gunnedah Basin formation tops and outcrop geology from geographic information systems (GIS). The ground surface elevation was determined using the Shuttle Radar Topography Mission (SRTM) 500 m digital elevation model (NTEC, 2013, p. 17, Table 2-1).

Dataset Citation

Geoscience Australia (2016) Namoi Leapfrog geological model. Bioregional Assessment Source Dataset. Viewed 12 March 2019, http://data.bioregionalassessments.gov.au/dataset/26747362-8e20-49df-ab2c-918fba839aa4.

Data and Resources

This dataset has no data

Additional Info

Field Value
Title Namoi Leapfrog geological model
Type Dataset
Language eng
Licence Restricted access. This dataset is not available for public distribution.
Data Status active
Update Frequency never
Landing Page https://data.gov.au/data/dataset/b135db84-d4bd-4a86-a89d-731db0a4c273
Date Published 2018-12-10
Date Updated 2023-08-09
Contact Point
Bioregional Assessment Program
Temporal Coverage 2018-12-10 03:19:22
Geospatial Coverage POLYGON ((0 0, 0 0, 0 0, 0 0))
Jurisdiction New South Wales
Data Portal data.gov.au
Publisher/Agency Bioregional Assessment Program