The observed data for the Clarence-Moreton bioregion are mainly from the Queensland and NSW state groundwater databases (Bioregional Assessment Programme, ; Bureau of Meteorology, ; NSW Hydstra and NSW WDTF) collected by the Bureau of Meteorology. As data collection ceased in November 2013, data received after November 2013 were not included in the analysis. Only bores with enough data to determine screen intervals or bore depth were used in the analysis (Table 10) as these data are necessary to assign a bore to particular aquifers. In the absence of bore screen data, the bore was assigned to an aquifer based on the depth of the bore if this information was deemed reliable and plausible. Seven screen codes are used to indicate different bores in terms of their spatial relationship with a particular aquifer. They are:
- I: bores with screen intervals inside the aquifer
- T: bores with a screen top inside the aquifer
- B: bores with a screen bottom within the aquifer
- E: bores with screen intervals penetrating the entire aquifer
- BOI: bores with their bottom inside the aquifer although without screen information in the database
- DS: aquifer assignment for a bore sourced directly from the state database where the bore is only open to a single aquifer
- DM: aquifer assignment for a bore sourced directly from the state database where the bore is screened to multiple aquifers.
The alluvium, Main Range / Lamington Volcanics and Woogaroo Subgroup represent the three most targeted aquifers with 3536, 921 and 868 associated bores, respectively. The mean of bore depths is less than 50 m and the 90th percentile of bore depth is around 120 m (Figure 21). Therefore, most bores in the Clarence-Moreton bioregion are relatively shallow with respect to the basin basement depth (2–4 km). Most bores are screened to either the alluvium or the outcrops of underlying bedrock aquifers. The shallow reach of bedrock bores is also demonstrated by their spatial distribution along the aquifer boundary. Figure 22 to Figure 28 display the spatial distribution of bores with construction information in major aquifers.
The inset shows the corresponding statistical summary. Three bores RN22500, RN75903 and RN124727, with respective depths of 1202 m, 805 m and 518 m, have been excluded from the plot for increased figure resolution.
Table 10 Number of bores with screen and/or depth information grouped by aquifers
The depth column presents the depth range of bores associated with a specific aquifer. Bores with different screen codes have been counted separately.
Screen codes are: (I) bores with screen intervals inside the aquifer; (T) bores with a screen top inside the aquifer; (B) bores with a screen bottom within the aquifer; (E) bores with screen intervals penetrating the entire aquifer; (BOI) bores with their bottom inside the aquifer although without screen information in the database; (DS) aquifer assignment for a bore sourced directly from the state database where the bore is only open to a single aquifer; (DM) aquifer assignment for a bore sourced directly from the state database where the bore is screened to multiple aquifers.
The presence of Rapville Member and Piora Member is mainly limited to NSW.
This formation is mainly present in NSW.
Product Finalisation date
- 2.1.1 Geography
- 2.1.2 Geology
- 220.127.116.11 Methods
- 18.104.22.168 Observed data
- 22.214.171.124 Statistical analysis and interpolation
- 126.96.36.199.1 Three-dimensional geological model workflow
- 188.8.131.52.2 Definition of the stratigraphic column
- 184.108.40.206.3 Selection of input datasets
- 220.127.116.11.4 Representation of structural elements in the three-dimensional geological model
- 18.104.22.168.5 Characterisation of binding horizons of shallow aquifers (alluvium and basalt)
- 22.214.171.124.6 Characterisation of the bedrock stratigraphic units in the Clarence-Moreton bioregion
- 126.96.36.199.7 Isopach maps, depth to formation top and depth to base of formation
- 188.8.131.52 Gaps
- 2.1.3 Hydrogeology and groundwater quality
- 184.108.40.206 Methods
- 220.127.116.11 Observed data
- 18.104.22.168 Statistical analysis and interpolation
- 22.214.171.124 Gaps
- 2.1.4 Surface water hydrology and water quality
- 2.1.5 Surface water – groundwater interactions
- 126.96.36.199 Observed data
- 188.8.131.52 Statistical analysis and interpolation
- 184.108.40.206 Gaps
- 2.1.6 Water management for coal resource developments
- Contributors to the Technical Programme
- About this technical product