Dryland salinity in Western Australia: managing a changing water cycle

2003 ◽  
Vol 47 (7-8) ◽  
pp. 201-207 ◽  
Author(s):  
R.J. Taylor ◽  
G. Hoxley
Keyword(s):  
Western Australia ◽  
Surface Runoff ◽  
Agricultural Land ◽  
Management Strategies ◽  
Groundwater Discharge ◽  
Groundwater Hydrology ◽  
Dryland Salinity ◽  
Saline Groundwater ◽  
The Future ◽  
Surface And Groundwater

Clearing of agricultural land has resulted in significant changes to the surface and groundwater hydrology. Currently about 10% of agricultural land in Western Australia is affected by dryland salinity and between a quarter and a third of the area is predicted to be lost to salinity before a new hydrological equilibrium is reached. This paper develops a general statement describing the changes to the surface and groundwater hydrology of the wheatbelt of Western Australia between preclearing, the year 2000 and into the future. For typical catchments in the wheatbelt it is estimated that average groundwater recharge and surface runoff have increased about tenfold when comparing the current hydrology to that preclearing. Saline groundwater discharge and flood volumes have also increased significantly. Saline groundwater discharge and associated salt load will probably double in the future in line with the predicted increase in the area of dryland salinity. In addition, future increases in the area of dryland salinity/permanent waterlogging will probably double the volumes in flood events and further increase surface runoff in average years. The outcomes of surface and groundwater management trials have been briefly described to estimate how the hydrology would be modified if the trials were implemented at a catchment scale. These results have been used to formulate possible integrated revegetation and drainage management strategies. The future hydrology and impacts with and without integrated management strategies have been compared.

Physical and Chemical Techniques for Discharge Studies - Part 1

1996 ◽  
Keyword(s):  
North America ◽  
Western Australia ◽  
Saline Lakes ◽  
Groundwater Discharge ◽  
South Australia ◽  
Dryland Salinity ◽  
Saline Groundwater ◽  
Murray River ◽  
Chemical Techniques ◽  
Physical And Chemical

Groundwater discharge is associated with salinity and pollution problems. The widespread presence of millions of saline lakes in North America, Africa and Australia, shows that across the geological record, most salinity and desertification problems have been caused by saline groundwater discharge. In recent times, dryland salinity has spread widely in southern Australia, resulting in the loss of more than 50% of the fresh streams in Western Australia and causing major salinity problems in the Murray River in South Australia.

Management Of Saline Groundwater Discharge By Long-term Windmill Pumping In The Wheatbelt, Western Australia

1994 ◽  
Vol 2 (1) ◽  
pp. 19-33 ◽  
Author(s):  
R. B. Salama ◽  
C. J. Otto ◽  
G. A. Bartle ◽  
G. D. Watson
Keyword(s):  
Western Australia ◽  
Groundwater Discharge ◽  
Saline Groundwater

Acidification of salinised waterways by saline groundwater discharge in south-western Australia

2012 ◽  
Vol 470-471 ◽  
pp. 111-123 ◽  
Author(s):  
B.P. Degens ◽  
P.D. Muirden ◽  
B. Kelly ◽  
M. Allen
Keyword(s):  
Western Australia ◽  
Groundwater Discharge ◽  
Saline Groundwater

scholarly journals Management and control options for tutsan (Hypericum androsaemum) in hill country pastures a review

2015 ◽  
Vol 68 ◽  
pp. 124-131
Author(s):  
T.K. James ◽  
A. Rahman
Keyword(s):  
New Zealand ◽  
Western Australia ◽  
Current Distribution ◽  
Agricultural Land ◽  
Review Paper ◽  
Management Strategies ◽  
Conservation Areas ◽  
Hill Country ◽  
Control Options ◽  
And Control

Tutsan (Hypericum androsaemum) is a highly invasive semievergreen shrubby weed found throughout New Zealand Described as a serious pasture weed in 1937 it has been held in check for many years by tutsan rust Recently it has spread rapidly into pasture forestry and conservation areas Present methods available for managing tutsan are proving inadequate and unsustainable This review paper provides an overview of tutsans biology ecology habitat and its current distribution in New Zealand It details possible management strategies and control options with emphasis on control by herbicides The paper identifies a number of potential herbicides which although not currently registered for control of tutsan have shown good efficacy on this weed and could be developed for use on agricultural land through further research Herbicides currently registered for control of tutsan in Australia as well as the current recommendations in Victoria and Western Australia are also summarised

A Methodology to Estimate the Future Extent of Dryland Salinity in the Southwest of Western Australia

2010 ◽  
Vol 39 (1) ◽  
pp. 26-34 ◽  
Author(s):  
Peter Caccetta ◽  
Robert Dunne ◽  
Richard George ◽  
Don McFarlane
Keyword(s):  
Western Australia ◽  
Dryland Salinity ◽  
The Future

Explaining groundwater hydrographs: separating atypical rainfall events from time trends

Soil Research ◽  
2001 ◽  
Vol 39 (4) ◽  
pp. 861 ◽  
Author(s):  
Ruhi Ferdowsian ◽  
David J. Pannell ◽  
Clare McCarron ◽  
Arjen Ryder ◽  
Lisa Crossing
Keyword(s):  
Western Australia ◽  
Time Trends ◽  
Time Trend ◽  
Agricultural Land ◽  
Explanatory Power ◽  
Dryland Salinity ◽  
Rainfall Events ◽  
Groundwater Levels ◽  
Average Rainfall ◽  
Using Data

By 1994, an estimated 1.8 million hectares of cleared land in Western Australia was affected by secondary dryland salinity to some extent. The area affected is likely to double in the coming 20 years. The cause of this salinity is excessive recharge under traditional agriculture, leading to rising groundwater levels. Monitoring changes in groundwater levels is helpful in indicating the degree of threat to agricultural land and public assets. Many researchers have studied groundwater level rises and attempted to explain them statistically. We present an approach for statistically estimating trends in groundwater levels. The approach separates the effect of atypical rainfall events from the underlying time trend and the lag between rainfall and its impact on groundwater is explicitly represented. Rainfall is represented as an accumulation of deviations from average rainfall. Application of the approach is demonstrated using data from 49 bores in Jerramungup Shire, Western Australia. The approach provides high explanatory power, particularly for deeper bores.

EVALUATION OF THE GROUNDWATER DISCHARGE FROM THE YARRAGADEE FORMATION INTO THE BLACKWOOD RIVER, BLACKWOOD PLATEAU, WESTERN AUSTRALIA USING WATER BALANCE ANALYSIS

2008 ◽  
Vol 6 (2) ◽  
Author(s):  
Baina Afkril
Keyword(s):  
Water Balance ◽  
Western Australia ◽  
Groundwater Discharge ◽  
Balance Analysis

<p>Area studi terletak di bagian tenggara Dataran Tinggi Blackwood, Australia Barat mencakup 71 km<sup>2</sup>. Akifer Yarragadee di daerah studi utamanya tersusun oleh batu pasir yang mengandung lapisan-lapisan batu lempung dan liat. Akifer ini merupakan akifer tak-tertekan karena muncul dipermukaan sepanjang alur Sungai Blackwood pada daerah hilir di Nannup dan merupakan sumber airtanah yang keluar ke sungai. Sungai Blackwood mengalir melintasi Dataran Tinggi Blackwood. Selama musim kering, aliran permukaan ke dalam Sungai Blackwood dapat diabaikan, namun aliran dasar dari airtanah menjadi sumber utama bagi aliran sungai. Neraca air pada daerah studi dilakukan dengan menggunakan analisa jaring-aliran dan kesetimbangan air guna mengevaluasi masukan airtanah dari akifer Yarragadee ke dalam Sungai Blackwood. Mayoritas sel-sel jaring-aliran adalah sel-sel keluaran dan kebanyakan aliran airtanah masuk ke dalam Sungai Blackwood di daerah studi. Curah hujan rata-rata tahunan area studi sekitar 6.7 x 10<sup>7</sup> m<sup>3</sup> a<sup>-1</sup>. Sekitar 9 % dari total curah hujan rata-rata tahunan ini masuk ke dalam tanah sebagai sumber bagi air tanah dan 91 % hilang melalui proses evapotranspirasi. Volume total airtanah yang masuk ke dalam Sungai Blackwood antara stasiun Darradup dan Layman Flat yang dihitung menggunakan analisis jarring-aliran dan kesetimbangan air sekitar 8.1 GL a<sup>-1</sup>.  </p>

scholarly journals Changes in Coastal Agricultural Land Use in Response to Climate Change: An Assessment Using Satellite Remote Sensing and Household Survey Data in Tien Hai District, Thai Binh Province, Vietnam

Land ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 627
Author(s):  
Duong H. Nong ◽  
An T. Ngo ◽  
Hoa P. T. Nguyen ◽  
Thuy T. Nguyen ◽  
Lan T. Nguyen ◽  
...  
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Agricultural Land ◽  
Land Use Changes ◽  
Management Strategies ◽  
Household Survey ◽  
Extreme Weather Events ◽  
Agricultural Land Use ◽  
Landsat 8 ◽  
Land Uses

We analyzed the agricultural land-use changes in the coastal areas of Tien Hai district, Thai Binh province, in 2005, 2010, 2015, and 2020, using Landsat 5 and Landsat 8 data. We used the object-oriented classification method with the maximum likelihood algorithm to classify six types of land uses. The series of land-use maps we produced had an overall accuracy of more than 80%. We then conducted a spatial analysis of the 5-year land-use change using ArcGIS software. In addition, we surveyed 150 farm households using a structured questionnaire regarding the impacts of climate change on agricultural productivity and land uses, as well as farmers’ adaptation and responses. The results showed that from 2005 to 2020, cropland decreased, while aquaculture land and forest land increased. We observed that the most remarkable decreases were in the area of rice (485.58 ha), the area of perennial crops (109.7 ha), and the area of non-agricultural land (747.35 ha). The area of land used for aquaculture and forest increased by 566.88 ha and 772.60 ha, respectively. We found that the manifestations of climate change, such as extreme weather events, saltwater intrusion, drought, and floods, have had a profound impact on agricultural production and land uses in the district, especially for annual crops and aquaculture. The results provide useful information for state authorities to design land-management strategies and solutions that are economic and effective in adapting to climate change.

scholarly journals Taking Implementation Seriously in the Evaluation of Urban Growth Management Strategies: “Safeguarding the Future” of the Antwerp City-Region

Land ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 159
Author(s):  
Clemens de Olde ◽  
Stijn Oosterlynck
Keyword(s):  
Urban Growth ◽  
Urban Areas ◽  
Growth Management ◽  
Management Strategies ◽  
Housing Prices ◽  
Policy Formulation ◽  
Land Values ◽  
Implementation Phase ◽  
The Future ◽  
Urban Growth Management

Contemporary evaluations of urban growth management (UGM) strategies often take the shape of quantitative measurements of land values and housing prices. In this paper, we argue that it is of key importance that these evaluations also analyse the policy formulation and implementation phases of growth management strategies. It is in these phases that the institutions and discourses are (trans)formed in which UGM strategies are embedded. This will enable us to better understand the conditions for growth management policies’ success or failure. We illustrate this point empirically with the case of demarcating urban areas in the region of Flanders, Belgium. Using the Policy Arrangement Approach, the institutional dynamics and discursive meanings in this growth instrument’s formulation and implementation phase are unravelled. More specifically, we explain how the Flemish strategic spatial planning vision of restraining sprawl was transformed into one of accommodating growth in the demarcation of the Antwerp Metropolitan Area, epitomised by two different meanings of the phrase “safeguarding the future.” In conclusion, we argue that, in Antwerp, the demarcation never solidified into a stable policy arrangement, rendering it largely ineffective. We end by formulating three recommendations to contribute to future attempts at managing urban growth in Flanders.

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