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• Publication and distribution of an information leaflet• Organisation of a national seminar on landslide hazardTasks to be undertaken by the Irish Landslides Working Group under the Geological Survey of Ireland.Cost:- €15,0002. Landslide Susceptibility Mapping and Research on Geotechnical Properties ofLandslidesSurveys of past landslide events and research into landslide materials and mechanisms underpin all futurestrategy on this geohazard in Ireland.Landslide Susceptibility MappingMain objectives• Expansion and enhancement of the National Landslides Database• Production of landslide susceptibility maps on a phased regional basis• Assessment of the feasibility of landslide hazard and risk mapping in Ireland• Assessment of the impact of climatic change on slope instability in IrelandSpecific Tasks• Field survey of past landslide events• Acquisition of reference data on past events from all available sources• Use of remote sensing techniques and manipulation of thematic and digital datasets in a GISframework• Coastal landslide survey in relation to coastal erosion• Development of a landslides classification scheme for Ireland• Development of a robust landslides susceptibility mapping methodology for Ireland• Assessment of available data sources to enable detailed costings to be made of landslide impacts• Development of a risk assessment methodology for Ireland based on international best practice• Pilot project on risk assessment• Review of climate datasets in relation to the occurrence of past landslide events and assessment ofprojected future climate change on slope stabilityTasks to be undertaken by the Geological Survey of Ireland in consultation with external agencies.Two consultants for a three-year period €240,000GIS/IT DatabaseAccess to DEMFieldworkOverheads €250,000Cost:- €490,000Research on Geotechnical Properties of LandslidesThese research projects on the geotechnical properties of landslide materials will be undertaken in UniversityCollege Dublin and Trinity College Dublin under the supervision of geotechnical engineers, who are members ofthe Irish Landslides Working Group. The research is costed over a three-year period in each case.90
Priority 1 Peat slides and peat strengthDetailed analysis of the landslides database; field studies at selected sites; work on peat strength; developmentof two Irish peat research sites, one on blanket bog and the other on raised bog; detailed geotechnical andhydrogeological characterisation of the two sites. This has high relevance to the understanding of slope failureon peat.Funding of 2 PhD students – field work and instrumentation costsCost:- €200,000Priority 2 Stable slopes in glacial tillReview of case histories of steep natural slopes and cuts in glacial tills; selection of a field study site; detailedinvestigation of the site; rotary coring for sample retrieval; installation of considerable instrumentation on site.The results of this research will have wide application given the extensive distribution of glacial till deposits inIrelandFunding of 1 PhD student – field work and instrumentation costsCost:- €150,000Priority 3 Stable slopes in marine tillsGeotechnical study of the marine-derived clays of southeast Ireland encountered in road infrastructuredevelopment and coastal erosion problems.Funding of 1 PhD student – travel costsCost:- €80,000Total Cost of Geotechnical Research — €430,0003. Landslides and Public PolicyThe most important benefit of all the proposed projects listed above would be the full integration of landslidehazard into public policy and guidelines on the planning process. Such integration can only be implementedwhen appropriate and readily accessible datasets on landslide susceptibility mapping and landslide riskassessment are available.Main Objectives• Increase an awareness of landslide hazard in Ireland• Full integration of landslide hazard into public policy and guidelines on the planning process.Specific Tasks• Assessment of the type and format of landslide data needed to prepare guidance on landslide hazard• Inter-agency consideration of a clear methodology for the implementation of a landslide hazardstrategy within the planning process• Widespread consultation with all interested parties on the preparation of national guidance• Preparation of national guidance on landslide hazardTasks to be undertaken by the Departments of Environment, Heritage, and Local Government, andCommunications, Marine and Natural Resources in consultation with a wide range of stakeholders.Cost:- €50,000Cost ResuméTotal Cost :- €985,000 over a three-year period91
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Landslides in IrelandGeological Sur
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LANDSLIDESinIRELANDEditorRonnie Cre
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CONTENTSPreface ...................
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Fig. 4.3 Forces caused by water in
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PREFACEUntil recently Ireland has b
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een very important in populating th
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involves a report on the current st
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Main Objectives• Increase public/
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1. INTRODUCTIONRonnie Creighton1.1
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1.3 The Landslides PublicationThis
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Peat flows are not nearly so well d
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In Ireland the Quaternary or uncons
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Journal - published papersLetter -
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Fig. 3.1 Two images showing the use
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Table 3.1 Landslide Events Per Coun
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Fig. 3.3 Location map of the Pollat
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3.7.4 Quaternary GeologyQuaternary
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3.8 The Derrybrien Landslide - 2003
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• The classification scheme shoul
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The force causing the block to slid
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Plate 4.1 Herringbone drainage syst
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1210Number of events864Raised bogBl
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It is well known by research at Uni
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5. LANDSLIDE SUSCEPTIBILITY MAPPING
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Two simplified hypothetical example
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5.1.4 Mapping and GISBy definition,
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Platform / sensor pixel resolution(
Page 56 and 57: For this initial run, the criteria
Page 58 and 59: 42Fig. 5.5 Peat and peaty podzols f
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Page 62 and 63: elationships between developed susc
Page 64 and 65: The methodology used to derive the
Page 66 and 67: 50Fig. 5.12. Landslide susceptibili
Page 68 and 69: 52Table 5.6. Landslide classificati
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Page 72 and 73: with slope, overall 20-25% of all e
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Page 79 and 80: CHAPTER 5.2 - TABLE APPENDIXBedrock
Page 81 and 82: 6. LANDSLIDES AND PLANNINGAileen Do
Page 83 and 84: 6.2.4 Development ManagementThe phy
Page 85 and 86: 6.5 Current Practice on Landslides
Page 88 and 89: 7. LANDSLIDES IN NORTHERN IRELANDTe
Page 90 and 91: 2. MudflowsPlate 7.1 Rotational Lan
Page 92 and 93: 7.2 Carboniferous Cliff Lines (Co F
Page 95 and 96: 8. RESEARCH ON IRISH LANDSLIDESKoen
Page 97 and 98: 8.4 Research. Post-2003 AbstractsTa
Page 99 and 100: Identifying, recognizing, and predi
Page 101 and 102: In the case of vulnerability mappin
Page 103 and 104: Steep slopes in glacial tillMichael
Page 105: 9. RECOMMENDATIONS FOR FUTURE WORK9
Page 109 and 110: TEXT REFERENCESAcreman, M., 1991. T
Page 111 and 112: Skipper, J., Follett, B., Menkiti,
Page 113 and 114: APPENDIX 2Glossary of TermsBlanket
Page 115 and 116: APPENDIX 3Nomenclature for Landslid
Page 117 and 118: APPENDIX 4101
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Page 123 and 124: Hammond, R. 1979. The Peatlands of
Page 125: APPENDIX 7Useful Web Linkswww.gsi.i
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