Dealing with salinity in Wheatbelt Valleys - Department of Water

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SOIL LANDSCAPE - VEGETATION RELATIONSHIPS FOR THE EASTERN WHEATBELT The Yilgarn and Lockhart Rivers are the major flow systems of the Zone of Ancient Drainage. This landscape is characterized by broad flat valley floors with salt lake chains, gently sloping valley sides, some rock outcrop and extensive areas of undulating sandplain. Surface water flow is driven by large rainfall events over all or part of the 2 water catchments. Bettenay and Hingston (1964) described landscape surfaces for the Eastern Wheatbelt. These have specific topographic characteristics, soil types and associated vegetation types. Norpa: Deep depositional sandplain of the uplands often covered with Wodgil (Acacia neurophylla) on acidic white sands or Grevillea/Banksia communities on yellow sands. Ulva: Shallow, gravelly soil surface bordering sandplain where wind has eroded the sand. Allocasaurina species growing in dense thickets is the predominant vegetation type. Booraan: This surface marks the eroded edge of the upland and often occurs below lateritic breakaways. Eucalyptus capillosa (Eastern white gum) is the predominant vegetation type in the Eastern Wheatbelt. Collgar: The distinctive sand over clay soil surface of the mid slopes covered with a variety of mallee forms. This vegetation type merges with York gum, Salmon gum and sandplain vegetation communities. Danberrin: The surface marked by the old soil mantle stripped to bedrock. The soil is usually shallow brown sand over a sandy clay on the top of granite. The York gum (E. loxophloba) is the typical vegetation type around rock outcrops. Merredin and Belka: These are the 2 soil surfaces of the lower slopes to valley floor. Salmon gum (E. salmonophoia) and Gimlet (E. salubris) are the predominant vegetation types. Merredin soils are colluvial red-brown sandy clay loams occupying broad flat valley tributaries to major drainage lines. Belka soils are grey alluvial sediments occupying magor river systems of the past. Nangeenan: The surface dominated by Morrel (E. longicornis) vegetation is composed of fine powdery aeolian loams and clays, originating from the floors of dry salt lakes. These areas are the depositional phase of the Baandee and typically seen in a lunette or dune form. Baandee: This surface represents the old drainage lines now infilled and reduced to a series of salt lakes. An erosional phase has often exposed Tertiary remnants and occasionally country rock. Typically the vegetation of these areas is saltbush (Atriplex spp) and blue bush (Maireana spp) with samphire (Halosarcia spp) occupying the most saline areas.
COLES FARM “Avon River Basin Overview” “Welcome to the Landscape” (Kath Yarran and Alan Cole) Large-scale catchment hydrology (John Ruprecht and Rosemary Nott) Regional Biodiversity (Natham McQuoid, Richard McLelland and Greg Keighery) Remote Sensing Information (Peter Caccetta) DOODLAKINE TAVERN “Predicting Salinity” Large-scale salinity predictions (Tom Hatton) Local-scale salinity predictions (Richard George) Community response to salinity predictions (Mike McFarlane) LAKE BAANDEE “Lakes Management” Salt lake ecosystems (Mark Coleman) Multiple Use of Lake Baandee (Alan Cole) Reconstructing altered ecosystems (Denis Saunders) Key Outcomes: • Recognising the ecological values of lakes • Understanding conflicting interests in lake use and values BUEGGE’S FARM “Aquaculture” Rainbow trout in purpose built dams (Mike and Jeanette Buegge) Pumping groundwater as a saline resource (Mike and Jeanette Buegge) Options for aquaculture (Jasper Trendall and Peter Lacey) Surface water management structures/oil mallees/biodiversity (Rosemary Nott) BELKA VALLEY “Catchment Water Management” Belka Valley landforms and hydrology
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Foreword Dealing with Salinity in W
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1Day one: Monday 30th July. Field t
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Papers Dealing with Salinity in Whe
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Ali and Coles biggest challenges fa
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Ali and Coles erosion, maintenance
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Ali and Coles expected under these
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Ali and Coles Coles, N.A. & Ali, M.
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Commander, Schoknecht, Verboom and
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APPRECIATING AND CREATING OUR HISTO
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services. The Government responded
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WHEATBELT VALLEYS IN DIFFICULTIES T
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argue that they were really abnorma
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1990s, the wheatbelt valleys in par
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REFERENCES Agstats (1997). Agricult
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George and Coleman two to four fold
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George and Coleman surface, the vas
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George and Coleman for example in t
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George and Coleman current trends c
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George and Coleman While not as div
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George and Coleman SPECIES Table 5:
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George and Coleman advantages of so
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George and Coleman this volume). In
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George and Coleman Venture Economy
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George and Coleman Lawrence, C. (19
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Hatton and Ruprecht WATCHING THE RI
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Since the mid 1970s annual rainfall
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Effect of clearing on runoff The ot
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Salinity Monthly streamflow (ML) 10
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The ratio of the salt outputs to in
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- 11 - Hatton and Ruprecht Table 4:
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THE FUTURE In looking at the future
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McFarlane, D.J., George, R.J. & Far
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Keighery, Halse and McKenzie Terres
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Keighery, Halse and McKenzie Wetlan
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Keighery, Halse and McKenzie specie
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Keighery, Halse and McKenzie enviro
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Lloyd number of legal cases pending
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Lloyd 0 -500 -1000 -1500 -2000 -250
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Lloyd Table 3. Sheep grazing days i
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Lloyd Hectares project to provide w
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INTRODUCTION The Lake Chinocup Catc
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agriculture) in various stages, the
Page 109 and 110: - 3,477 ha of remnant vegetation or
Page 111 and 112: Scientists talk of up to 30% of the
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Page 115 and 116: Although the waterlogged area under
Page 117 and 118: eliminates drainage through the nex
Page 119 and 120: REFERENCES Dawes, W.R., Stauffacher
Page 121 and 122: Pannell ECONOMICS, SOCIETY AND ENVI
Page 123 and 124: Pannell • the area of land protec
Page 125 and 126: Pannell Proposals to construct majo
Page 127 and 128: Pannell been conducted for the Cent
Page 129 and 130: Pannell investments in long-term la
Page 131 and 132: Pannell Pannell, D.J. (2001). Dryla
Page 133 and 134: Porter, Bartle and Cooper Table 1:
Page 139 and 140: Porter, Bartle and Cooper operation
Page 141 and 142: Porter, Bartle and Cooper Increase
Page 145 and 146: Porter, Bartle and Cooper support i
Page 147 and 148: Porter, Bartle and Cooper that is a
Page 149 and 150: CASE STUDY - TOOLIBIN LAKE AND CATC
Page 151 and 152: • The distribution, storage and m
Page 153 and 154: Secondly, there is a set of practic
Page 155 and 156: within three categories: relationsh
Page 157 and 158: CONCLUSIONS Actions to protect and
Page 159: FIELD TOUR LOCATIONS FIELD TOUR NOT
Page 163 and 164: Conference Outcomes Dealing with Sa
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Page 197 and 198: Photo Gallery 2 Dealing with Salini
Page 199 and 200: APPENDIX 1 BACKGROUND HYDROLOGY AND
Page 201 and 202: WHEATBELT HYDROLOGY Flow in the Yil
Page 203 and 204: Flow (ML) STREAM SALINITY Salt Rive
Page 205 and 206: APPENDIX 2 WATER MANAGEMENT OPTIONS
Page 207 and 208: APPENDIX 3 MANAGING WATER AND SALIN
Page 209 and 210: SUMMARY- TIMELINE OF RECENT SIGNIFI
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RECENT HISTORY OF WATER AND SALINIT
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Figure 1. Hydrological cross-sectio
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Depth (m) 316 315 314 313 312 311 M
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FURTHER INVESTIGATIONS AND MANAGEME
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Dealing with salinity in Wheatbelt Valleys - Department of Water

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