The impact of landslides and erosion in the Corangamite region, Victoria, Australia
- Dahlhaus, Peter, Miner, Anthony, Feltham, W., Clarkson, Troy
- Authors: Dahlhaus, Peter , Miner, Anthony , Feltham, W. , Clarkson, Troy
- Date: 2006
- Type: Text , Conference paper
- Relation: Paper presented at the Geological Society of London 2006, Nottingham, United Kingdom : 6th September, 2006
- Full Text: false
- Reviewed:
- Description: The Corangamite region in southwest Victoria, Australia is subject to a variety of geohazards, among which landslides and erosion have the most significant impact. Over the past fifty years, landslides have resulted in loss of life and many millions of dollars damage to municipal infrastructure and development. Soil erosion by water and wind has also impacted on the region's waterways and environment, threatening a diverse range of assets from urban water quality to Ramsar-listed wetlands. More assets are placed at risk each year, as the increasing regional population results in an acceleration of anthropogenic modifications to landscapes. A comprehensive GIS database was initiated by assembling all publicly available previous databases and reports documenting landslides and erosion in the 1,340 km2 region. New data were added by mapping occurrences which were visible on high-resolution ortho-corrected aerial photographs. The field-checking of the occurrences was assisted by the participation of the local community, municipal officers and catchment management coordinators. At present 2163 landslides and 2380 erosion sites have been identified, mapped and referenced in the database. It is believed that thousands more instances exist, but these cannot be identified at the aerial photo scale, or are obscured by dense vegetation. A spatial analysis has been undertaken to identify landscape parameters which correlate with the occurrences. Historical aerial photography was used in selected locations to identify the rates of erosion and landslide events. The inventory has been used to estimate the economic, social and environmental costs of landslides and soil erosion within the region, using documented instances of damage and the costs of remediation. Combined with the value of the assets and elements at risk, the potential likelihood of occurrence and associated consequences, these estimates are used to develop a strategy for the investment of public funds in remediation.
- Description: E1
- Description: 2003002058
Geohazard risk management for municipal planning in the Corangamite region, Victoria, Australia
- Dahlhaus, Peter, Miner, Anthony
- Authors: Dahlhaus, Peter , Miner, Anthony
- Date: 2006
- Type: Text , Conference paper
- Relation: Paper presented at The 10th international congress of the IAEG, Nottingham, UK : 6th September, 2006
- Full Text: false
- Reviewed:
- Description: The Corangamite region covers an area of approximately 13,340 km2 and is located in south western Victoria, Australia. The population of approximately 400,000 persons is growing at 5.2% per year, and is served by nine municipalities within the region. The region's diverse range of landscapes and climatic conditions, result in a variety of geological hazards including landslides, soil erosion of all forms, coastal erosion, dryland salinity, potential acid sulphate soils, reactive soils and ground subsidence. These geohazards are increasingly recognised as a constraint on future urban development and a threat to the economic, social and environmental health of the region. Evaluation of the impacts of geological hazards by State government authorities, research institutions and consultants has been inconsistent, both in hazard identification and risk assessment methods. As a result, municipal planning authorities have lacked a consistent framework with which to assess the potential impacts from these hazards and those associated with new developments which may interact with the hazards. The use of risk assessment techniques for the management of landslides in Australia advanced significantly after the publication of the Australian Geomechanics Society's landslide risk management concepts and guidelines in 2000. These guidelines in turn were based on the Australian/New Zealand Standard on Risk Management. Similar risk management techniques have now been developed by the authors for the assessment of soil erosion and salinity for particular use by municipalities within the Corangamite region. A brief review of the nature and extent of landslides, salinity and erosion in the Corangamite region is detailed. The adopted methods of the risk management for each geohazard are described including a comparison of their applicability and an assessment of limitations with each method.
- Description: E1
- Description: 2003002055
Rockfalls : Predicting high-risk behaviour from beliefs
- Aucote, Helen, Miner, Anthony, Dahlhaus, Peter
- Authors: Aucote, Helen , Miner, Anthony , Dahlhaus, Peter
- Date: 2010
- Type: Journal article
- Relation: Disaster Prevention and Management Vol. 19, no. 1 (2010), p. 20-31
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- Reviewed:
- Description: Purpose – The purpose of this paper is to gain an understanding of the public's beliefs, attitudes and knowledge regarding rockfalls, and to see whether these variables could predict whether a person is likely to enter high-risk rockfall areas. Design/methodology/approach – A questionnaire was developed to measure beliefs (informed by the health belief model), knowledge, and previous behaviour in relation to rockfalls. Questions were also included to measure attitudes regarding rockfall caution signs. In total, 138 members of the general public completed the questionnaire. Findings – High-risk behaviour was more likely if the person was male and if the person had the belief that sign-posted high-risk areas were not dangerous. Further, believing that the sign-posted areas were not dangerous was more likely among people who held negative attitudes towards cautionary signs; specifically, these participants were more likely to doubt the validity of the warning signs. Research limitations/implications – The research was exploratory in nature. Further research should be conducted with a larger sample size and a more random selection of the general population. Ways of improving measurement of the variables are discussed. Practical implications – Efforts should be made to increase the public's perception of the validity of rockfall cautionary signs. Doing so may decrease injury and death as a result of rockfalls. Suggestions on ways to increase the validity of signage are made. Originality/value – It is presumed that this study is the first to attempt to gain an understanding of the beliefs and attitudes that may lead a person into engaging in high-risk behaviour in relation to rockfalls.
- Authors: Aucote, Helen , Miner, Anthony , Dahlhaus, Peter
- Date: 2010
- Type: Journal article
- Relation: Disaster Prevention and Management Vol. 19, no. 1 (2010), p. 20-31
- Full Text:
- Reviewed:
- Description: Purpose – The purpose of this paper is to gain an understanding of the public's beliefs, attitudes and knowledge regarding rockfalls, and to see whether these variables could predict whether a person is likely to enter high-risk rockfall areas. Design/methodology/approach – A questionnaire was developed to measure beliefs (informed by the health belief model), knowledge, and previous behaviour in relation to rockfalls. Questions were also included to measure attitudes regarding rockfall caution signs. In total, 138 members of the general public completed the questionnaire. Findings – High-risk behaviour was more likely if the person was male and if the person had the belief that sign-posted high-risk areas were not dangerous. Further, believing that the sign-posted areas were not dangerous was more likely among people who held negative attitudes towards cautionary signs; specifically, these participants were more likely to doubt the validity of the warning signs. Research limitations/implications – The research was exploratory in nature. Further research should be conducted with a larger sample size and a more random selection of the general population. Ways of improving measurement of the variables are discussed. Practical implications – Efforts should be made to increase the public's perception of the validity of rockfall cautionary signs. Doing so may decrease injury and death as a result of rockfalls. Suggestions on ways to increase the validity of signage are made. Originality/value – It is presumed that this study is the first to attempt to gain an understanding of the beliefs and attitudes that may lead a person into engaging in high-risk behaviour in relation to rockfalls.
FedUni Spatial landslide database
- Dahlhaus, Peter, Miner, Anthony
- Authors: Dahlhaus, Peter , Miner, Anthony
- Date: 2006 -
- Type: Text , Dataset
- Full Text: false
- Reviewed:
- Description: The UB Spatial landslide database is part of an interoperable web-GIS maintained by the University of Ballarat. It records data on the spatial distribution of landslide points, lines and polygons that have been mapped for landslide research projects undertaken by the University. The UB Spatial website was initially developed with funding support from the Corangamite Catchment Management Authority and contained four environmental datasets: groundwater bores, salinity, erosion and landslides, covering the Corangamite region. Subsequent funding was received from the Australian Government National Disaster Mitigation Program sourced through the Colac Otway Shire to enhance the data. The UB Spatial landslide database contains information on the spatial locations, landslide extents, landslide types, data sources, data capture methods and assessment date, landscape parameters and dates and styles of movements in south west Victoria. A.S. Miner Geotechnical (Geelong-based consulting geotechnical engineers) has significantly contributed to the data coverage. The University of Wollongong and Mineral Resources Tasmania both contributed to the database schema. The UB spatial landslide database is updated as landslide research projects are completed. Much of this work has been documented for the Corangamite Soil Health Strategy and background reports relating to the research can be accessed at the Corangamite Soil Health Strategy website. https://soilhealth.ccmaknowledgebase.vic.gov.au/soils_map.php
- Description: The UB Spatial landslide database is part of an interoperable web-GIS maintained by the University of Ballarat. It records data on the spatial distribution of landslide points, lines and polygons that have been mapped for landslide research projects undertaken by the University. The UB Spatial website was initially developed with funding support from the Corangamite Catchment Management Authority and contained four environmental datasets: groundwater bores, salinity, erosion and landslides, covering the Corangamite region. Subsequent funding was received from the Australian Government National Disaster Mitigation Program sourced through the Colac Otway Shire to enhance the data. The UB Spatial landslide database contains information on the spatial locations, landslide extents, landslide types, data sources, data capture methods and assessment date, landscape parameters and dates and styles of movements in south west Victoria. A.S. Miner Geotechnical (Geelong-based consulting geotechnical engineers) has significantly contributed to the data coverage. The University of Wollongong and Mineral Resources Tasmania both contributed to the database schema. The UB spatial landslide database is updated as landslide research projects are completed. Much of this work has been documented for the Corangamite Soil Health Strategy and background reports relating to the research can be accessed at the Corangamite Soil Health Strategy website. http://www.ccma.vic.gov.au/soilhealth/reports.htm
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