Whole of GAB reports

Water resource assessment for the Great Artesian Basin

Smerdon BD, Ransley TR, Radke BM and Kellett JR (2012) .

Chapter 1: Introduction

Figure 1.4 Areas of groundwater recharge across the Great Artesian Basin

• Groundwater recharge areas:
• Regionally variable local recharge:
• Cenozoic aquifer recharge zone:

Chapter 2: The effect of future climate and groundwater development

Figure 2.1 The impact of future climate on groundwater levels in the Great Artesian Basin. This figure shows change in groundwater levels under median future climate and continuation of current groundwater development relative to historical climate and current groundwater development

• Change in groundwater level:

Figure 2.2 The impact of future groundwater development on groundwater levels in the Great Artesian Basin. This figure shows change in groundwater levels under median future climate and future groundwater development relative to median future climate and continuation of current groundwater development

• Scenario Dmid relative to scenario Cmid:

Chapter 3: Geology and hydrogeology

Figure 3.1 Basement elevation of the Great Artesian Basin with structural elements of the Eromanga, Carpentaria, Surat and Clarence-Moreton basins

• Base Jurassic-Cretaceous sequence elevation:
• Fault:

Figure 3.3 Thickness of Cenozoic sediments (Neogene and Paleogene periods only) over the Great Artesian Basin

• Thickness:
• Sediment thickness contour:

Figure 3.6 Potential connection between the Great Artesian Basin and underlying geological basins

• Potential for hydraulic connection between the base of the GAB and top of underlying basement sequences:

Figure 3.7 Extent of Cenozoic deposits (Neogene and Paleogene periods only) overlying the Jurassic-Cretaceous sequence of the Great Artesian Basin

• Overlying sediments that will contain paleochannels:
• Hydrogeological Units:

Chapter 4: Groundwater conditions

Figure 4.1 Maps of groundwater levels for the Cadna-owie - Hooray and equivalents across the Great Artesian Basin since the start of groundwater development

• Groundwater level:

Figure 4.2 Total alkalinity (left) and total dissolved solids (right) for the Cadna-owie - Hooray Aquifer and equivalents

• Total alkalinity:
• Total dissolved solids:

Figure 4.3 Difference in groundwater levels between early development and modern day including selected hydrographs

• Difference in groundwater level:

Figure 4.4 Difference between the regional watertable and groundwater levels in the Cadna-owie - Hooray and equivalents across the Great Artesian Basin

• Water table elevation:
• Potentiometric surface:

Figure 4.5 Ratio of chlorine-36 to chloride in the Cadna-owie - Hooray Aquifer and equivalents. High values are indicative of recharge areas

• Chlorine-36 to Chloride ratio:

Figure 4.6 Fluoride concentrations for groundwaters in the Cadna-owie - Hooray Aquifer and equivalents (left) and Hutton aquifer (right). High values (red) indicate areas where upward leakage could be occuring

• Flouride:

Chapter 5: Advancing the understanding of the Great Artesian Basin

Figure 5.1 Revised hydrogeological boundary of the Great Artesian Basin

• Revised hydrogeologic boundary of the GAB:

Water resource assessment for the Great Artesian Basin - Synthesis

Smerdon BD, Marston FM and Ransley TR (2012) . CSIRO Water for a Healthy Country Flagship, Australia.

Figure 1. Geographic extent of the Great Artesian Basin and ground surface topography, with areas of potential groundwater recharge

• Groundwater recharge areas:
• Regionally variable local recharge:
• Cenozoic aquifer recharge zone:

Figure 3. Revised hydrogeological boundary of the Great Artesian Basin. Note: the outliers in South Australia represent protrusion of older rocks through the GAB

• Revised hydrogeologic boundary of the GAB:

Figure 4. Potential areas of hydraulic connection between the base of the Great Artesian Basin and underlying basement sequences

• Potential for hydraulic connection between the base of the GAB and top of underlying basement sequences:

Figure 5. Overlap of the Great Artesian Basin aquifers and aquifers of shallower, younger geological deposits

• Overlying sediments that will contain paleochannels:
• Hydrogeological Units:

Figure 7. Groundwater level maps for the Cadna-owie - Hooray Aquifer across the Great Artesian Basin for different time periods since the start of groundwater development in Great Artesian Basin aquifers

• Groundwater level:

Figure 8. Difference in groundwater levels from pre development (circa 1900) to the present day (circa 2010)

• Difference in groundwater level: