A geochemical approach to determining the hydrological regime of wetlands in a volcanic plain, south-eastern Australia
- Authors: Cox, Jim , Barton, Annette , Herczeg, Andrew , Dahlhaus, Peter
- Date: 2013
- Type: Text , Book chapter
- Relation: Groundwater and Ecosystems : IAH Selected papers on Hydrogeology p. 69-79
- Full Text: false
- Reviewed:
- Description: The Corangamite region in south-eastern Australia contains a large number of lakes and wetlands within an extensive, basaltic plain. To assess the impact of land-use change and groundwater pumping on wetland ecosystems, there is a need to develop a better understanding of their hydrology. This paper describes an approach using groundwater and surface water chemistry and stable isotopes to determine the extent that they are surface or groundwater dominant, and whether they are through-flow or terminal in nature. The ionic ratio HCO3-/Cl- is higher in surface waters than groundwater, and lakes plot on a continuum between these two water types. Deuterium “excess” (
A New assessment framework for transience in hydrogeological systems
- Authors: Currell, Matthew , Gleeson, Tom , Dahlhaus, Peter
- Date: 2016
- Type: Text , Journal article
- Relation: Groundwater Vol. 54, no. 1 (2016), p. 4-14
- Full Text: false
- Reviewed:
- Description: The importance of transience in the management of hydrogeologic systems is often uncertain. We propose a clear framework for determining the likely importance of transient behavior in groundwater systems in a management context. The framework incorporates information about aquifer hydraulics, hydrological drivers, and time scale of management. It is widely recognized that aquifers respond on different timescales to hydrological change and that hydrological drivers themselves, such as climate, are not stationary in time. We propose that in order to assess whether transient behavior is likely to be of practical importance, three factors need to be examined simultaneously: (1) aquifer response time, which can be expressed in terms of the response to a step hydrological change (τstep) or periodic change (τcycle); (2) temporal variation of the dominant hydrological drivers, such as dominant climatic systems in a region; (3) the management timescale and spatial scale of interest. Graphical tools have been developed to examine these factors in conjunction, and assess how important transient behavior is likely to be in response to particular hydrological drivers, and thus which drivers are most likely to induce transience in a specified management timeframe. The method is demonstrated using two case studies; a local system that responds rapidly and is managed on yearly to decadal timeframes and a regional system that exhibits highly delayed responses and was until recently being assessed as a high level nuclear waste repository site. Any practical groundwater resource problem can easily be examined using the proposed framework.
- Description: The importance of transience in the management of hydrogeologic systems is often uncertain. We propose a clear framework for determining the likely importance of transient behavior in groundwater systems in a management context. The framework incorporates information about aquifer hydraulics, hydrological drivers, and time scale of management. It is widely recognized that aquifers respond on different timescales to hydrological change and that hydrological drivers themselves, such as climate, are not stationary in time. We propose that in order to assess whether transient behavior is likely to be of practical importance, three factors need to be examined simultaneously: (1) aquifer response time, which can be expressed in terms of the response to a step hydrological change (
A web-GIS and landslide database for South West Victoria and its application to landslide zonation
- Authors: Dahlhaus, Peter , Miner, Anthony , MacLeod, Andrew , Thompson, Helen
- Date: 2012
- Type: Text , Journal article
- Relation: Australian geomechanics Vol. 46, no. 2 (2012), p. 203-209
- Full Text: false
- Reviewed:
- Description: The Australian Geomechanics Society's (AGS) guidelines on Landslide Risk Management emphasise landslide zonation as a key requirement for regulators dealing with landslide risk (AGS 2007a). The basis for zonation is a landslide inventory which reflects the nature and spatial distribution of landslide types in a particular locale, such as a local government area. This paper describes the design and implementation of a web-based landslide database for south west Victoria aimed at disseminating landslide inventory information to regulators. consultants and the general public. Although the 4,581 mapped landslides represent the most complete and extensive data set for the region, the current data quality and resolution does not meet the AGS guideline for landslide zonation at the municipal planning scale. However, with an essential need for landslide planning controls in this region, the data is the best available for the construction of zonat ion maps, resulting in conservative boundaries at the required map scale. The paper highlights the ongoing need to improve the spatial extent and quality of the landslide database if the statutory planning zonation maps are ultimately to comply with the AGS guidelines.
An assessment of the monitoring methods and data limitations for inflow and infiltration in sewer networks
- Authors: Jayasooriya, Mahinda , Dahlhaus, Peter , Barton, Andrew , Gell, Peter
- Date: 2015
- Type: Text , Conference proceedings
- Relation: 36th Hydrology and Water Resources Symposium: The Art and Science of Water, HWRS 2015; Hobart, Tasmania; 7th-10th December 2016. p. 436-442
- Full Text: false
- Reviewed:
- Description: Inflow and infiltration into separate sewer systems is an ongoing challenge experienced by water utilities in managing sewer networks across the world. An accurate estimation of groundwater infiltration in terms of volume and flow rate is important for making decisions on sewer rehabilitation and for the effective operation of sewer networks. The fast response of surface inflow to sewers occurs during or immediately after a prolonged or intense precipitation event and can often be exacerbated by illegal stormwater connections into the sewer network. The slow response of inflow to sewers can be attributed to deep infiltration or the discharge of groundwater into the sewer network. A common practice for most Australian water utilities in combatting the problem of infiltration and inflow is to undertake short to medium term sewer network flow monitoring, while collecting contemporaneous rainfall data, to assess the various volumes and their origin in their sewer networks. This paper presents a review of the current data collection practices, using the City of Ballarat in south eastern Australia as a case study. Discussion is provided around gaps in data collection practices to properly understand the problem and recommendations are made on what additional monitoring works should be performed so that infiltration, in particular, can be assessed on a sound scientific basis. © 2015, Engineers Australia. All rights reserved.
- Description: The Art and Science of Water - 36th Hydrology and Water Resources Symposium, HWRS 2015
An unexpected decrease in urban water demand : Making discoveries possible by taking a long-term view
- Authors: Ebbs, David , Dahlhaus, Peter , Barton, Andrew , Kandra, Harpreet
- Date: 2018
- Type: Text , Journal article
- Relation: Water Policy Vol. 20, no. 3 (2018), p. 617-630
- Full Text: false
- Reviewed:
- Description: Forecasting supply and demand is fundamental to the sustainability of the water system. Demand for urban water seems on an ever-upward trajectory, with use increasing twice as quickly as population throughout the 20th century. However, data from Ballarat, a city in south-eastern Australia, show that despite this conventionally held wisdom, total water usage actually peaked over 30 years ago. While the 1997–2009 ‘Millennium Drought’ had some effect, the decline commenced many years before. Initially, this was due to a reduction in external domestic water use, which correlates well with an increase in water price. However, the effect was found to not be purely economic as the price was not volumetric-based. Internal water use seems more affected by technological advances and regulatory controls. Interestingly, there was no relationship found between rainfall and water demand. The role of price, water-reduction education programmes, water-efficient technology and regulation supports previous research that a multifaceted approach is required when developing demand-reduction policies and strategies. This finding emphasises the importance of understanding the component of consumptive behaviour being targeted, and ensuring that policies being implemented are appropriate for the desired behavioural change.
Analysis of a combined circular–toppling slope failure in an open–pit
- Authors: Al Mandalawi, Maged , You, Greg , Dahlhaus, Peter , Dowling, Kim , Sabry, Mohannad
- Date: 2019
- Type: Text , Conference paper
- Relation: 2nd GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures, Egypt 2018 - The official international congress of the Soil-Structure Interaction Group in Egypt, SSIGE 2018 p. 10-30
- Full Text: false
- Reviewed:
- Description: Most studies of rock slope failures on open–pit mines have considered either toppling or circular failure stability analysis. By comparison, complex circular–toppling failure has received much less attention in the published literature. This paper presents a study using a range of methods to investigate a failure that occurred in July 2008 in Handlebar Hill, an open–pit base metal mine, near Mt Isa, Australia. Circular failure is the typical slope failure mechanism in slopes with low–strength rocks, although direct/flexural toppling of jointed columns can also occur. The study reviews circular–toppling failure mechanisms in the context of the local geotechnical and geo–hydrological conditions, which include the interaction between fault contacts and the existing deformed rocks. General limit equilibrium methods are used to evaluate the sensitivity of slope models to rock strength parameters and the trigger mechanisms. Finite element methods are used to assess the failure mechanisms and slope displacement, and a kinematic approach is used to evaluate structurally controlled slope instability mechanisms. The results demonstrate that the most credible failure mechanism was shearing along a circular path through the upper weaker rocks (leached Magazine Shale) that in turn initiated secondary block toppling, and the progressive nature of the slope failure mechanism. The use of conventional and numerical techniques for back–analysis of the combined circular–toppling failure provided key insights into the failure mechanisms and factors controlling slope instability. © 2019, Springer Nature Switzerland AG.
Beyond hydrogeologic evidence : Challenging the current assumptions about salinity processes in the Corangamite region, Australia
- Authors: Dahlhaus, Peter , Cox, Jim , Simmons, Craig , Smitt, C. M.
- Date: 2008
- Type: Text , Journal article
- Relation: Hydrogeology Journal Vol. 16, no. 7 (2008), p. 1283-1298
- Full Text:
- Reviewed:
- Description: In keeping with the standard scientific methods, investigations of salinity processes focus on the collection and interpretation of contemporary scientific data. However, using multiple lines of evidence from non-hydrogeologic sources such as geomorphic, archaeological and historical records can substantially add value to the scientific investigations. By using such evidence, the validity of the assumptions about salinity processes in Australian landscapes is challenged, especially the assumption that the clearing of native vegetation has resulted in rising saline groundwater in all landscapes. In the Corangamite region of south-west Victoria, salinity has been an episodic feature of the landscapes throughout the Quaternary and was present at the time of the Aboriginal inhabitants and the first pastoral settlement by Europeans. Although surface-water salinity has increased in some waterways and the area of salinised land has expanded in some landscapes, there is no recorded evidence found which supports significant rises in groundwater following widespread land-use change. In many areas, salinity is an inherent component of the region's landscapes, and sustains world-class environmental assets that require appropriate salinity levels for their ecological health. Managing salinity requires understanding the specific salinity processes in each landscape. © Springer-Verlag 2008.
Coastal rock fall hazard identification, Barwon Heads, Victoria
- Authors: Dahlhaus, Peter , Muller, B. , Miner, Anthony
- Date: 2006
- Type: Text , Journal article
- Relation: Australian Geomechanics Journal Vol. 41, no. 3 (2006), p. 85-91
- Full Text:
- Description: C1
- Description: 2003002060
Corangamite Catchment Management Authority Knowledge Base
- Authors: Thompson, Helen , Dahlhaus, Peter , MacLeod, Andrew , McKenna, Kirsten
- Type: Text , Dataset
- Full Text: false
- Description: The Corangamite Catchment Management Authority Knowledge Base is part of an interoperable web-GIS maintained by Federation University Australia. The site provides an extensive collection of publications and Datasets on all aspects of the catchment. The collection focuses on information written specifically for the Corangamite Region. The database has been indexed by subject and locality for information retrieval and analysis. Federation University Australia's Centre for eResearch and Digital Innovation is hosting the site on behalf of the CCMA. The Federation University Australia Corangamite Catchment Management Authority Knowledge Base was established to ensure the protection and sustainable development of land, vegetation and water resources within a boundary stretching from Geelong to Ballarat and along the coast to Peterborough. About 380,000 people live in the catchment's 13,340 square kilometres of south-western Victoria and 175 kilometres of coastal fringe. The region is defined by four river basins - the Moorabool, Barwon, Lake Corangamite and Otway Coast. It includes all or part of the cities of Ballarat and Greater Geelong, the Borough of Queenscliff and the shires of Moorabool, Surf Coast, Corangamite, Golden Plains, Colac Otway and Moyne. Related initiatives include Soil Health, an online repository of soil health information and knowledge: including reports, research papers, maps and descriptions related to current and past soil series mapping, land capability and suitability assessments, agricultural trials, and soil research and investigations; and, NRM Planning, a pilot project testing how online mapping can be used to match local and regional priorities for catchment management in the Corangamite Catchment Management Authority region.
Corangamite Soil Health Knowledge Base
- Authors: Thompson, Helen , Dahlhaus, Peter , MacLeod, Andrew , McKenna, Kirsten
- Type: Text , Dataset
- Full Text: false
- Description: The Corangamite Corangamite soil health knowledge base is part of an interoperable web-GIS maintained by Federation University Australia. The Corangamite soil health knowledge base is a collaborative research project between the Corangamite Catchment Management Authority (CMA) and the Centre for eResearch and Digital Innovation (CeRDI) at Federation University Australia (FedUni). The aim of the research is to develop a comprehensive, informative, intuitive-to-use knowledge base of soil health information that will assist the broader community to respect the values of the soils of the Corangamite region. The project was initiated in June 2013. The research is overseen by the Corangamite CMA Land Health Program Steering Committee. The role of the committee in the project is to advise on the function, use and relevance of the data and information sources in the knowledge base, which is an online repository of soil health information and knowledge: including reports, research papers, maps and descriptions related to current and past soil series mapping, land capability and suitability assessments, agricultural trials, and soil research and investigations. Soil health studies in the Corangamite region date from 1936. The most recent document to revisit soil health issues in the Corangamite region is Soils Vision: A 20-year plan to improve broad-acre agricultural soils in south west Victoria, known as the 'south west agricultural soils plan' (SWASP). This community-led initiative brought together a collaboration of farming groups, agricultural industries, government agencies and research institutions to identify the activities required to improve the condition of soils used for agriculture in South West Victoria. The goal of this project is to provide the essential background knowledge required to implement the appropriate SWASP soil health actions customised for each of the 15 Local Catchment Plans in the Corangamite region. Project aim and research questions The overall aim this project is to develop a comprehensive, informative, intuitive-to-use knowledge base of soil health information that will assist the broader community implement the SWASP within the LCPs of the Corangamite region. To achieve this, the following key questions emerge: What information exists and how relevant is it to the current soil health issues? How reliable is the information and to which landscapes does it apply? How can the relevant soil health information be best maintained and disseminated?
Digital Soil Mapping
- Authors: Dahlhaus, Peter , MacLeod, Andrew , Robinson, Nathan
- Type: Text , Dataset
- Full Text: false
- Description: DSM is a collaborative workspace for researchers working on digital soil mapping in Australia. This workspace is the initiative of the Advisory Group on Digital Soil Assessment, a working group of the National Committee on Soil & Terrain. The website is part of an interoperable web-GIS maintained by the Centre for eResearch and Digital Innovation (CeRDI) at Federation University Australia (FedUni). The International Union of Soil Sciences Digital Soil Mapping Working Group defines DSM as "creation and the population of a geographically referenced soil database, generated at a given resolution by using field and laboratory observation methods coupled with environmental data through quantitative relationships." Digital Soil Mapping (DSM) utilises numerical methods and information technologies to produce predictive maps of soil types and their properties. DSM relies on traditional field mapping, observations and laboratory analyses for soil data but also utilises spatial models of landscape terrain and remotely-sensed properties. Typically numerical methods such as interpolation algorithms and data mining are used to create the maps. OzDSM in collaboration with CeRDI is developing a digital soil mapping tool, and a demonstrator version is displayed on the site. A range of data is included, such as nutrient budgets and soil pH, and with extra data available for the Corangamite Catchment Management Authority region including landslides, erosion and salinity.
Effect of faults on stability of partially saturated rock slope
- Authors: You, Greg , Jaggi, Nav , Al Mandalawi, Maged , Dowling, Kim , Dahlhaus, Peter
- Date: 2019
- Type: Text , Book
- Relation: Deep Rock Mechanics : From Research to Engineering
- Full Text: false
- Reviewed:
- Description: The effect of three faults on the slope stability was studied for the Stage 1 open pit in an open cut mine in Australia. The faults were treated as joints using Barton's method, and the slope was under dry and partially saturated conditions. A finite element program in RocScience was used in the study, where the generalized Hoek-Brown criterion was employed for rock mass and the Mohr-coulomb criterion for the faults. It is found that the factor of safety of the slope decreased with the introduction of the fault structures. Furthermore, the fault structures created higher stress concentrations zones at the ends of the faults.
Enabling global exchange of groundwater data : GroundWaterML2 (GWML2)
- Authors: Brodaric, Boyan , Boisvert, Eric , Chery, Laurence , Dahlhaus, Peter , Grellet, Sylvain , Kmoch, Alexander , Létourneau, Francois , Lucido, Jessica , Simons, Bruce , Wagner, Bernhard
- Date: 2018
- Type: Text , Journal article
- Relation: Hydrogeology Journal Vol. 26, no. 3 (2018), p. 733-741
- Full Text: false
- Reviewed:
- Description: GWML2 is an international standard for the online exchange of groundwater data that addresses the problem of data heterogeneity. This problem makes groundwater data hard to find and use because the data are diversely structured and fragmented into numerous data silos. Overcoming data heterogeneity requires a common data format; however, until the development of GWML2, an appropriate international standard has been lacking. GWML2 represents key hydrogeological entities such as aquifers and water wells, as well as related measurements and groundwater flows. It is developed and tested by an international consortium of groundwater data providers from North America, Europe, and Australasia, and facilitates many forms of data exchange, information representation, and the development of online web portals and tools. © 2018, The Author(s).
Environmental benefits inferred from impact of reforestation of deforested creek bank on soil conditioning : A case study in Victoria, Australia
- Authors: Rasiah, Velu , Florentine, Singarayer , Dahlhaus, Peter
- Date: 2015
- Type: Text , Journal article
- Relation: Agroforestry Systems Vol. 89, no. 2 (2015), p. 345-355
- Full Text: false
- Reviewed:
- Description: Information regarding changes in soil condition after reforestation may help in inferring environmental and ecosystem benefits. A case study was undertaken in Victoria State, Australia, to investigate the changes in soil condition after reforestation of a deforested creek bank to infer environmental benefits. The study was conducted at four sites in a large farm. At each site a ~150 mstrip of land that ran perpendicular to a creek from the bank to cropping area was selected. The results show that total organic carbon (TOC) and total mineral nitrogen (TN) in the cropped segment (CS) of a strip at a given site were significantly higher than in the corresponding reforested segment (RS) which in turn was higher than in the bare segment (BS) whilst the electrical conductivity (EC) and bulk density (BD) were in the order BS > RS > CS. Six years after reforestation, TOC and TN in the RS increased by 30 and 24 %, respectively, compared with 9 and 8 % for 3 years. The EC, BD, and pH decreased by 26, 14, 14 %, respectively, 6 years after reforestation. Creek bank reforestation associated improvements in TOC, TN, BD, EC, and pH may have positive impact on pollutant and salinity abatement. © Springer Science+Business Media Dordrecht 2014.
Exploring a flow regime and its historical changes downstream of an urbanised catchment
- Authors: Ebbs, David , Dahlhaus, Peter , Barton, Andrew , Kandra, Harpreet
- Date: 2018
- Type: Text , Conference paper
- Relation: 10th International Conference on Water Sensitive Urban Design: Creating water sensitive communities (WSUD 2018 & Hydropolis 2018), Perth, Western Australia p. 131-141
- Full Text:
- Reviewed:
- Description: The rapid growth of Ballarat's urban area, an inland city of approximately 100,000 people in south-eastern Australia, suggests that it is suitable for stormwater capture and reuse. With a threefold increase in the number of dwellings in recent decades, along with a 90% increase in their average size, it should follow that there is evidence of more flow being generated from the urban areas. However, while additional runoff from the growth of impervious areas may be occurring, the overall flow in the receiving river has dramatically reduced with a 60% decrease in the rainfall-runoff relationship since 1997. This reduction in river flow seems disproportionate to any association with the Millennium Drought which occurred during 1997 to 2009. The evidence of river flow has been complicated by other changes in the catchment. A change in the rainfall-runoff relationship has been identified in other similar catchments, and may lead to significant impacts on water resource management over the long term. To better understand the impacts on river flow downstream of an urbanised catchment, the flow has been partitioned into various components over time using the daily stream flow data available from 1957. Base flow, calculated as the stream flow after periods of four or more days without rain, has decreased. Transfers, predominantly from other catchments for use as potable supply and entering the river via the waste water treatment plant, have remained steady, but now make up the vast majority of dry weather flow. While climatic variations have impacted the river significantly the actual streamflow reduction has been twice that predicted by data from the Australian Water Resources Assessment. A significant increase in the number of small farm dams due to the expansion of peri-urban living around Ballarat explains a further portion of the flow reduction. This paper highlights multiple factors which influence river flow and demonstrates how increases in urbanised area do not necessarily create additional river flow at larger aggregate scales. The investigation therefore provides a cautionary tale around assumptions of stormwater harvesting and any perceived benefit to river flow, and provides insights into the importance of collecting water information of the correct type and scale to help inform future integrated urban water management efforts.
FedUni Spatial groundwater bore database
- Authors: Dahlhaus, Peter
- Date: 2006 -
- Type: Text , Dataset
- Full Text: false
- Description: The FedUni Spatial groundwater bore database is part of an interoperable web-GIS maintained by the University of Ballarat. It records data on groundwater research and monitoring bores that are either owned, maintained or monitored by the University for groundwater research projects. 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. The FedUni Spatial groundwater bore database contains information on bore location, bore ownership, bore construction details, aquifer parameters, groundwater level monitoring, groundwater chemistry and isotopes, bore lithology and stratigraphy. It includes links to images, documents, datafiles and weblinks that are relevant to individual bore records. The UB spatial groundwater bore database is also used to clean and enhance data, most of which is then revised in the Victorian Groundwater Management System owned and managed by the Department of Sustainability and Environment. The UB Spatial groundwater bore data is also included in the Visualising Victoria's Groundwater web-portal www.vvg.org.au
- Description: The UB Spatial groundwater bore database is part of an interoperable web-GIS maintained by the University of Ballarat. It records data on groundwater research and monitoring bores that are either owned, maintained or monitored by the University for groundwater research projects. 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. The UB Spatial groundwater bore database contains information on bore location, bore ownership, bore construction details, aquifer parameters, groundwater level monitoring, groundwater chemistry and isotopes, bore lithology and stratigraphy. It includes links to images, documents, datafiles and weblinks that are relevant to individual bore records. The UB spatial groundwater bore database is also used to clean and enhance data, most of which is then revised in the Victorian Groundwater Management System owned and managed by the Department of Sustainability and Environment. The UB Spatial groundwater bore data is also included in the Visualising Victoria's Groundwater web-portal www.vvg.org.au
FedUni Spatial landslide database
- 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
FedUni Spatial salinity database
- Authors: Dahlhaus, Peter
- Date: 2006 - 2010
- Type: Text , Dataset
- Full Text: false
- Reviewed:
- Description: The FedUni Spatial salinity database is part of an interoperable web-GIS maintained by the Federation University Australia. It records data on the spatial distribution of salinity polygons that have been mapped for salinity 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. The UB Spatial salinity database contains information on the spatial extents, dominant type, severity, source and assessment date of the salinity in the Corangamite Catchment Authority region. The UB spatial salinity database is infrequently updated. The vast majority of the data was collected and assembled by Dr Peter Dahlhaus for his PhD project. http://theses.flinders.edu.au/public/adt-SFU20100928.150627/index.html
- Description: The UB Spatial salinity database is part of an interoperable web-GIS maintained by the University of Ballarat. It records data on the spatial distribution of salinity polygons that have been mapped for salinity 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. The UB Spatial salinity database contains information on the spatial extents, dominant type, severity, source and assessment date of the salinity in the Corangamite Catchment Authority region. The UB spatial salinity database is infrequently updated. The vast majority of the data was collected and assembled by Dr Peter Dahlhaus for his PhD project. http://theses.flinders.edu.au/public/adt-SFU20100928.150627/index.html
Finite element analysis of rock slope stability using shear strength reduction method
- Authors: You, Greg , Al Mandalawi, Maged , Soliman, Ahmed , Dowling, Kim , Dahlhaus, Peter
- Date: 2017
- Type: Text , Conference proceedings
- Relation: 1st GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures; Sharm El Sheikh, Egypt;15th-19th July 2017; published in Soil Testing, Soil Stability and Ground Improvement : Proceedings of the 1st GeoMEast International Congress and Exhibition, Egypt 2017 on Sustainable Civil Infrastructures (part of the Sustainable Civil Infrastructures book series) p. 227-235
- Full Text: false
- Reviewed:
- Description: Finite element analysis incorporating the shear strength reduction method was applied to study the west slope stability of an open cut mine in Australia using Mohr–Coulomb and generalized Hoek–Brown criteria. The pit of the mine had multiphase excavations and reached 180 m in depth. The study investigated three slope configurations, namely, Stage 1 inter ramp slope 43°, Stage 2 inter ramp slope 49° and optimized Stage 2 slope 54°. When implementing the generalized Hoek–Brown failure criterion, the equivalent factor of safety was 1.96, 1.87 and 1.40 under dry slope for the three configurations, respectively. However, under partly saturated conditions, the optimised slope would have a factor of safety 1.16. Furthermore, the generalised Hoek–Brown criterion generated lower factors of safety than the Mohr–Coulomb failure criterion. The difference is related to an overestimation of the shear strength parameters by the linear Mohr–Coulomb criterion under low confining stresses compared with the non-linear Hoek–Brown.
Geohazard risk management for municipal planning in the Corangamite region, Victoria, Australia
- 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