The only source of potential rainfall to the Eromanga Basin is via the Innamincka Dome, which lies over the Innamincka Ridge. No other Eromanga Basin units crop out in the . Some limited recharge via diffuse infiltration of sporadic rain water, flood waters or streamflow through Quaternary and Cenozoic cover sequences may occur, although this is likely to be effectively zero, as a result of extremely low rainfall and high evaporation (; ). The most significant source of to the Eromanga Basin sequence in the Cooper subregion is from areas outside the subregion.
Natural leakage or natural to surface takes place at and areas of seepage, as well as in lakes, which are abundant around the margins of the Central Eromanga Basin (; ). Figure 15 highlights groundwater discharge to the surface at Lake Blanche.
is present in ephemeral drainages and terminal salt lake systems in the subregion. The drainage network is active following large rain events in the headwaters, and is subject to spectacular flood flows. Springs are the only recognised groundwater contribution to the surface water system in the southern Cooper Basin.
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- 2.3.1 Methods
- 2.3.2 Summary of key system components, processes and interactions
- 2.3.3 Ecosystems
- 2.3.4 Baseline and coal resource development pathway
- 2.3.5 Conceptual models of causal pathways
- Contributors to the Technical Programme
- About this technical product