GEOMORPHOLOGY REPORT - CRC LEME

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Question 3: Understanding of the drivers of floodplain health with respect to groundwater processes The combined LIDAR and SPOT/ASTER interpretation assisted in mapping floodplain health and allowed prediction of the geomorphic, soil, and sedimentologic parameters influencing associated with salt stores and recharge, important to the health of floodplain vegetation. Integrated products relating to floodplain health are found in the GIS and Atlas and include the Conductive Groundwater, Conductive Soils, Surface Salinity, Salinity Hazard, and Salt Store maps. Question 4: Identification of the high recharge areas in the floodplain? ASTER and LIDAR interpretation we predict will identify potential areas on the basis of abandoned or stagnant river channels or scroll bars lacking an impermeable clay drape. These will need to be field verified, however, especially as stagnant or abandoned channels may well have their bottoms sealed by clay. This would leave only the youngest meander scroll bars which lack the pervasive clay drape, or where the clay drape is very thin, as areas of high potential recharge on the floodplain. Mapping surface recharge are found in the GIS and Atlas include the Flush Zone Thickness, Flush Zone Conductivities, Extent of Flush Zones, and Groundwater Recharge maps. Question 5: What is the extent and thickness of the Blanchetown Clay and the Coonambidgal Formation? We can’t answer this question in this area from surface exposures as imaged by satellites or scanned to form DEMS. Nor are they visible in preliminary field observations. We regard this question as answerable only through a combination of AEM and bore hole data, as showing the Thickness of Quaternary Alluvium, Extent of Quaternary Alluvium, and Depth to Top of Blanchetown Clay maps in the GIS and Atlas. Question 6: Where is salt stored in the unsaturated zone? We predict that contextualised analysis of surface soil samples will help identify these areas of salt storage, backed up by analysis of shallow (above the water table) borehole samples. integrated products relating to salt stores Conductive Groundwater, Conductive Soils, Surface Salinity, Salinity Hazard, and Salt Store maps in the GIS and Atlas. 23
REFERENCES Bowler, J.M. and Harford, L.B. 1966. Quaternary tectonics and the evolution of the riverine plain near Echuca, Victoria. Journal of the Geological Society of Australia 13(2), 339- 354. Brown, C.M. and Stephenson, A.E. 1991. Geology of the Murray Basin, southeastern Australia. BMR Bulletin 235. Butler, B.E. 1958. Depositional systems of the riverine plain of south-eastern Australia in relation to soils. Commonwealth Scientific and Industrial Research Organisation, Soil Publication 10, 35p. Butler, B.E., Blackburn, G., Bowler, J.M., Lawrence, C.R., Newell, J.W., Pels, S. 1973. A Geomorphic Map of the Riverine Plain of South-eastern Australia. Australian National University Press, Canberra. Chappell, B.W. 1991. Trace element analysis of rocks by X-ray spectrometry. Advances in X- Ray Analysis 34, 263-276. Chen, X.Y. 1995. Geomorphology, stratigraphy and thermoluminescence dating of the lunette dune at Lake Victoria, western New South Wales. Palaeogeography, Palaeoclimatology, Palaeoecology 113, 69-86. Gill, E.D. 1973. Geology and geomorphology of the Murray River region between Mildura and Renmark, Australia. Memoirs of the National Museum of Victoria 34, 1-97. Gingele, F.X. and De Deckker, P. 2004. Fingerprinting Australia's rivers with clay minerals and the application for the marine record of climate change. Australian Journal of Earth Sciences 51(3), 339-348. Hills, E.S. 1975. Physiography of Victoria; an Introduction to Geomorphology. Whitcombe & Tombs Pty. Ltd., Australia, 373p. Jolly, I.D., Walker, G.R., and Thorburn, P.J. 1993. Salt accumulation in semi-arid floodplain soils with implications for forest health. Journal of Hydrology, 150(2-4), 589-614. Knighton, A.D. and Nanson, G.C. 2000. Waterhole form and process in the anastomosing channel system of Cooper Creek, Australia Geomorphology, 35(1-2), 101-117. Kotsonis, A., Cameron, K.J., Bowler, J.M., and Joyce, E.B. 1999. Geomorphology of the Hattah Lakes region on the River Murray, southeastern Australia; a record of late Quaternary climate change. Proceedings of the Royal Society of Victoria, 111(1), 27- 42. Lawrie. K. 2006 (comp.) Report by technical working group chair on proposed River Murray corridor (South Australian border to Gunbower) Victorian AEM mapping project. <strong>CRC</strong> <strong>LEME</strong> Restricted Report 265R. McDonald RC and Isbell RF (1998) Soil Profile. In "Australian Soil and Land Survey" (Eds RC McDonald, RF Isbell, JG Speight, J Walker and MS Hopkins) pp. 103-152. (CSIRO: Australia). 24
Page 1 and 2: CRCLEME Cooperative Research Centre
Page 3 and 4: This report (CRC LEME Open File Rep
Page 5 and 6: Lindsay and Wallpolla Creeks are si
Page 7 and 8: TABLE OF CONTENTS _Toc224538156 1 I
Page 9 and 10: List of Tables Table 1. Association
Page 11 and 12: The main objective of the studies r
Page 13 and 14: 4. Identification of the high recha
Page 15 and 16: The SRTM was used as to provide the
Page 17 and 18: Figure 6. Compartmentalisation of t
Page 19 and 20: Dune on terrace Alluvial terrace Yo
Page 21 and 22: Intermediate floodplain Modern floo
Page 23 and 24: Locations of sample sites are given
Page 25 and 26: 6.1 Granulometry 6.1.1 Methodology
Page 27 and 28: Table 2). Mean pH and EC profiles a
Page 29 and 30: when sampling. This is also reflect
Page 31: Figure 12. SPOT image of Wallpolla
Page 35 and 36: APPENDIX 1. ASTER data and interpre
Page 37 and 38: APPENDIX 2. SPOT Data and interpret
Page 39 and 40: APPENDIX 3. DEM data and interpreta
Page 41 and 42: APPENDIX 4. Gamma-ray data 500000 (
Page 43 and 44: APPENDIX 6. Site Descriptions and D
Page 45 and 46: Site 3 South Settlement road, ~20 m
Page 47 and 48: Site 5 Western end of Keera Road, s
Page 49 and 50: Site 7 Eastern end of Old Mail Rd t
Page 51 and 52: Site 12 Further to west along Old M
Page 53 and 54: Site 14 Dedmens drive, across aband
Page 55 and 56: Site 16 Same area as previous sampl
Page 57 and 58: Site 18 Same location as 17, interm
Page 59 and 60: Site 20 Adjacent to previous site C
Page 61 and 62: Site 22 2 km east of Finnegans brid
Page 64 and 65: APPENDIX 7: Analytical Results Appe
Page 66 and 67: Appendix 7.2: Lindsay-Wallpolla Las
Page 68 and 69: Appendix 7.3: Lindsay-Wallpolla XRF
Page 70 and 71: 16 200709 1929587 20-30 Fm1 7 0.611
Page 72 and 73: Site Number Depth LEME ID Sample #

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