Dealing with salinity in Wheatbelt Valleys - Department of Water

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with Salinity in Wheatbelt Valleys Conference Dealing Prospects and Practical Options Processes, INTRODUCTION SURVEY RESULTS A survey of attendees at a salinity conference in Western Australia was conducted at both the outset and conclusion of the 3-day proceedings. The survey consisted of sixteen questions that related to salinity in Western Australian Wheatbelt valleys, particularly the way people perceived its extent and impacts, and options for its treatment. METHOD Responses from the surveys were entered into an Excel database and interrogated using the statistics program, Statistica. All valid responses were used to generate an overview of attitudes before and after the conference. The initial survey had a sample size of 117 respondents, whilst the repeat survey had a sample size of 76 respondents. We could not ascertain how many people filled out both surveys as most people did not disclose their name on the survey. Agency staff and rural landholders were isolated from the complete dataset to perform further analysis, which accounted for approximately 75% of the original sample. It was assumed that local government representatives from rural shires were also landholders in the associated district. RESULTS Part 1. General Outcomes Risk Most people attending the conference held the prior view that the risk of further salinity in wheatbelt valleys was serious (31% stated that there was a high risk; 61% stated there was a very high risk). This general perception was not altered by the conference. Where the two surveys differed was in the number of people that did not know the risk of further salinity: at the beginning of the conference five percent of respondents stated that they did not know the risk, whereas there were no respondents in this category in the second survey. There was a comparable increase in the number of people rating salinity as a very high risk in the second survey, indicating that the conference heightened people’s perception of the risk. Timeframe In both surveys, the majority of respondents believed that most salinity will have appeared in the next 20 years (31% in survey 1; 32% in survey 2) to 50 years (38% in survey 1; 46% in survey 2). At the end of the conference, attitudes had shifted away from an urgent to a longer time scale – the figure below shows a decrease in the percentage of people in the now category and an increase in the number of people in the 50 years and 50 years plus categories.
with Salinity in Wheatbelt Valleys Conference Dealing Prospects and Practical Options Processes, Percent of people Offsite Impacts on Biodiversity A notable outcome of the conference is the large shift in attitudes towards viewing the impact of salinity on native plants and animals with high importance. The figure below shows that 67% of respondents were in the high category in the first survey, compared to 89% in second survey. Percent of people Question 1.2 When do expect the majority of wheatbelt valley salinity to have occurred? 50 40 30 20 10 0 100 80 60 40 20 0 External Costs to Rural Infrastructure Now 10 yrs 20 yrs 50 yrs 50 yrs plus Response Don’t know Question 1.3 How important is it to you that native plants and animals in wheatbelt valleys are at risk from salinity? None Low Medium Response High Don’t know Before After Before After Opinions on the costs relating to the impact of salinity on rural infrastructure were normally distributed across the choice categories. Attitudes in the second survey were less variable with no respondents believing the costs would be the same and an additional 20 per cent of respondents believing that the cost would be at least 5 times greater than now (see figure below). Question 1.4 To what extent do you think the costs of repairing roads, rail and buildings will increase over time due to salinity in wheatbelt valleys? Percent of people 60 50 40 30 20 10 0 Same 2 times 5 times Response 10 times Don’t know Before After
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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
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- 3,477 ha of remnant vegetation or
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Scientists talk of up to 30% of the
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6320000 6300000 6280000 6260000 624
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Although the waterlogged area under
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eliminates drainage through the nex
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REFERENCES Dawes, W.R., Stauffacher
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Pannell ECONOMICS, SOCIETY AND ENVI
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Pannell • the area of land protec
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Pannell Proposals to construct majo
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Pannell been conducted for the Cent
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Pannell investments in long-term la
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Pannell Pannell, D.J. (2001). Dryla
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Porter, Bartle and Cooper Table 1:
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Porter, Bartle and Cooper Table 3:
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Page 145 and 146: Porter, Bartle and Cooper support i
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Page 149 and 150: CASE STUDY - TOOLIBIN LAKE AND CATC
Page 151 and 152: • The distribution, storage and m
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Page 157 and 158: CONCLUSIONS Actions to protect and
Page 159 and 160: FIELD TOUR LOCATIONS FIELD TOUR NOT
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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
Page 211 and 212: RECENT HISTORY OF WATER AND SALINIT
Page 213 and 214: Figure 1. Hydrological cross-sectio
Page 215: Depth (m) 316 315 314 313 312 311 M
Page 218 and 219: FURTHER INVESTIGATIONS AND MANAGEME
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Dealing with salinity in Wheatbelt Valleys - Department of Water

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