GEOMORPHOLOGY REPORT - CRC LEME

TABLE OF CONTENTS
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1 INTRODUCTION............................................................................................................ 1
2 PREVIOUS STUDIES..................................................................................................... 2
3 KEY LAND MANAGEMENT QUESTIONS ................................................................ 3
4 METHODOLOGY........................................................................................................... 5
4.1 Basic method and rationale ...................................................................................... 5
4.2 Data Availability and Quality .................................................................................. 5
4.2.1 Satellite imagery .................................................................................................. 5
4.2.2 Digital Elevation Models..................................................................................... 5
4.2.3 Gamma-ray data................................................................................................... 6
4.3 Satellite image Processing ....................................................................................... 6
4.4 Fieldwork ................................................................................................................. 7
5 RESULTS ........................................................................................................................ 7
5.1 Regolith Landform Units ......................................................................................... 7
5.1.1 Uplands................................................................................................................ 8
5.1.2 Alluvial terrace .................................................................................................... 8
5.1.3 Floodplain............................................................................................................ 9
5.2 Vegetation .............................................................................................................. 11
5.2.1 Uplands.............................................................................................................. 12
5.2.2 Alluvial Terrace................................................................................................. 12
5.2.3 Floodplain.......................................................................................................... 13
6 ANALYTICAL DATA.................................................................................................. 13
6.1 Granulometry ......................................................................................................... 16
6.1.1 Methodology...................................................................................................... 16
6.1.2 Results ............................................................................................................... 16
6.2 EC and pH.............................................................................................................. 17
6.2.1 Methodology...................................................................................................... 17
6.2.2 Results ............................................................................................................... 17
6.3 XRF geochemistry ................................................................................................. 19
6.3.1 Methodology...................................................................................................... 19
6.3.2 Results ............................................................................................................... 19
6.4 XRD mineralogy.................................................................................................... 20
6.4.1 Methods ............................................................................................................. 20
6.4.2 Results ............................................................................................................... 20
7 IMPLICATIONS............................................................................................................ 21
7.1 Hydrogeological issues .......................................................................................... 21
7.1.1 Flow................................................................................................................... 21
7.1.2 Recharge ............................................................................................................ 21
7.1.3 Relevance to land management questions ......................................................... 22
REFERENCES........................................................................................................................ 24
APPENDIX 1. ASTER data and interpretation....................................................................... 26
APPENDIX 2. SPOT Data and interpretation........................................................................ 28
APPENDIX 3. DEM data and interpretation........................................................................... 30
APPENDIX 4. Gamma-ray data.............................................................................................. 32
APPENDIX 5. Surface materials ............................................................................................ 33
APPENDIX 6. Site Descriptions and Data.............................................................................. 34
APPENDIX 7: Analytical Results........................................................................................... 55
Appendix 7.1 Lindsay-Wallpolla soil EC and pH data....................................................... 55
Appendix 7.2: Lindsay-Wallpolla Laser Grainsize............................................................. 57
Appendix 7.3: Lindsay-Wallpolla XRF results................................................................... 59
Appendix 7.4: Lindsay-Wallpolla XRD Mineralogy.......................................................... 62
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