This study provides a technical assessment of the Oolloo Dolostone Aquifer which is managed in terms of the Oolloo Dolostone Aquifer Water Allocation Plan (the ‘plan’) 2019-2029. The plan applies to all groundwater within the aquifer and all surface water discharges derived from the aquifer.
The Oolloo Dolostone hosts a major regional-scale aquifer in the Daly geological basin. Groundwater discharges out from the aquifer all year round through springs in low-lying areas, along the river banks and within the Daly River channel itself. This groundwater discharge maintains perennial flows in the Daly River and its tributaries, which also receive upstream inflows from the Tindall Limestone Aquifer. The Jinduckin Formation, Florina Formation and minor local-scale aquifers within the overlying Cretaceous sediments provide minor discharge to the surface drainage system of the Daly River and its tributaries within the plan area.
The purpose of this overview is to provide a scientific assessment of groundwater and surface water resources within the plan area, including the inter-connected nature of flow dynamics between them, and how these change throughout the year. The assessment focusses particularly on observed changes to flow regimes and water levels within these systems over the last five years (2019 to 2024).,
This study provides a technical assessment of the Oolloo Dolostone Aquifer which is managed in terms of the Oolloo Dolostone Aquifer Water Allocation Plan (the ‘plan’) 2019-2029. The plan applies to all groundwater within the aquifer and all surface water discharges derived from the aquifer. The Oolloo Dolostone hosts a major regional-scale aquifer in the Daly geological basin. Groundwater discharges out from the aquifer all year round through springs in low-lying areas, along the river banks and within the Daly River channel itself. This groundwater discharge maintains perennial flows in the Daly River and its tributaries, which also receive upstream inflows from the Tindall Limestone Aquifer. The Jinduckin Formation, Florina Formation and minor local-scale aquifers within the overlying Cretaceous sediments provide minor discharge to the surface drainage system of the Daly River and its tributaries within the plan area.The purpose of this overview is to provide a scientific assessment of groundwater and surface water resources within the plan area, including the inter-connected nature of flow dynamics between them, and how these change throughout the year. The assessment focusses particularly on observed changes to flow regimes and water levels within these systems over the last five years (2019 to 2024).,
Notes
Made available by via Publications (Legal Deposit) Act 2004 (NT),
Table of contents
Acronyms -- Glossary of Terms -- 1. Introduction -- 2. Study area -- 3. Groundwater Model --4. Groundwater Assessment -- 5. Surface Water Assessment -- 6. Risk Assessment -- 7. Discussion -- 8. Key Findings and Recommendations -- 9. Conclusions -- 10. References -- Appendix A: Rainfall data - Silo -- Appendix B: Stratigraphic logs -- Appendix C: Groundwater hydrographs -- Appendix D: Modelled groundwater hydrographs -- Appendix E: Groundwater quality .-- Appendix G: Surface water quality,
Language
English,
Subject
Water Allocation Plan,
Oolloo Dolostone Aquifer,
Oolloo Water Allocation Plan,