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Meedo Hydrogeology Report for Department of Agriculture and Food, W PO Box 174 Global Bassendean Western Australia Groundwater 6054 Australian Bore Consultants Pty. Ltd. Hydrogeological Division ACN 077 734 153 ABN 66 077 734 153 Meedo Station Hydrogeological Report for Department of Agriculture March, 2007 Hydrogeologist Global Groundwater P.O. Box 174 Bassendean WA 6054 Tel: + 61 8 9386 4725 Fax: + 61 8 9386 1080 Reference: \\194gAGWAGascoyneDrill\MeedoHydroReport2007.pdf Meedo Hydrogeology Report for Department of Agriculture and Food, W. A. Australian Bore Consultants Pty Ltd Trading As: Global Groundwater ACN 077 734 153 ABN 66 077 734 153 PO Box 174 Bassendean, Western Australia 6054 Telephone: 61 8 9386 4725 Facsimile: 61 8 9386 1080 E-mail: [email protected] © 2007 Global Groundwater (Australian Bore Consultants Pty. Ltd. Hydrogeological Division) No warranty or guarantee, whether expressed or implied, is made with respect to the data findings, observations and conclusions contained in this report The entire report was provided in digital form with the original bound copy. Use of the digital file is entirely at the risk of the user and no liability is accepted for damage caused by use of the digital file. The Client has unlimited access to the information in this report but some of the data is the property of Global Groundwater or is under copyright licence agreement so the report may not be provided to a third party or cited without written permission. Global Groundwater accepts no liability or responsibility whatsoever for and in the respect of any use or reliance on this report by any third party. Document Status Version Author Reviewer Approved for Issue No. Name Signature Date 1 R. Nixon D. Skidmore R. Nixon 29/3/2007 Reference: \\194gAGWAGascoyneDrill\MeedoHydroReport2007.pdf Meedo Hydrogeology Report for Department of Agriculture and Food, W. A. CONTENTS 1 Introduction ................................................................................................................ 1 2 Previous Work............................................................................................................ 1 3 Program Description and Methodology....................................................................... 2 3.1 Drilling, Bore Construction and Test Pumping........................................................ 2 3.2 Test Pumping Analysis........................................................................................... 3 3.3 Resource Estimation.............................................................................................. 3 3.4 Meta Data .............................................................................................................. 3 4 Setting........................................................................................................................4 4.1 Physiographical Setting ......................................................................................... 4 Climate ................................................................................................................ 4 Access................................................................................................................. 4 Geomorphology................................................................................................... 4 Vegetation and Landuse...................................................................................... 4 4.2 Existing Bores........................................................................................................ 4 5 Hydrogeology ............................................................................................................. 5 5.1 Geological Sequence............................................................................................. 5 5.2 Aquifers ................................................................................................................. 6 Superficial Aquifers.............................................................................................. 7 Birdrong Sandstone............................................................................................. 7 Permian Sediments ............................................................................................. 8 5.3 Aquifer Parameters................................................................................................ 9 Bore M 11/04....................................................................................................... 9 Bore M 12/04..................................................................................................... 11 6 Bore Capacity........................................................................................................... 12 6.1 Bore M 11/04 ....................................................................................................... 12 6.2 Bore M 12/04 ....................................................................................................... 13 7 Water Quality............................................................................................................ 13 7.1 Groundwater Salinity............................................................................................ 13 7.2 Hydrochemistry.................................................................................................... 14 8 Groundwater Resources........................................................................................... 15 8.1 Conceptual Hydrogeological Model...................................................................... 15 Aquifer Thickness.............................................................................................. 16 Groundwater Storage ........................................................................................ 16 Groundwater Throughflow ................................................................................. 17 Groundwater Recharge ..................................................................................... 17 Groundwater Movement and Discharge............................................................. 18 8.2 Numerical Model.................................................................................................. 18 Reference: \\194gAGWAGascoyneDrill\MeedoHydroReport2007.pdf Meedo Hydrogeology Report for Department of Agriculture and Food, W. A. Model Discretisation .......................................................................................... 19 Steady State Calibration .................................................................................... 20 Transient Calibration.......................................................................................... 20 Predictive Modelling........................................................................................... 20 9 Assessment of Potential Impacts.............................................................................. 22 9.1 Existing Groundwater Users ................................................................................ 22 9.2 Environmental Impacts ........................................................................................ 22 10 Conclusions.............................................................................................................. 23 11 Recommendations ................................................................................................... 24 12 References............................................................................................................... 25 TABLES Table 1 .............................................................................................. Summary of 2004 Bores Table 2 .............................................................................................. Summary of 2005 Bores Table 3 ............................................................................................. Summary of Stock Bores Table 4 ............................................................................................... Stratigraphic Sequence FIGURES Figure 1 .......................................................................................................Regional Location Figure 2 .................................................................. Meedo Bore and Soil Resource Locations Figure 3 .....................................................Environmental Correction of Potentiometric Heads Figure 4 ..............................................................................................Step Test Bore M 11/04 Figure 5 ...............................................................................Constant Rate Test Bore M 11/04 Figure 6 ..............................................................................Residual Drawdown Bore M 11/04 Figure 7 ..............................................................................................Step Test Bore M 12/04 Figure 8 ...............................................................................Constant Rate Test Bore M 12/04 Figure 9 ..............................................................................Residual Drawdown Bore M 12/04 Figure 10 .............................................................................................Piper Trilinear Diagram Figure 11 ............................ Modelled Potentiometric Contours (20 years pumping at 4 GL/yr) Figure 12 ................................................. Modelled Drawdown (20 years pumping at 4 GL/yr) APPENDICES Appendix A ............................................................... Test Pumping Data and
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