Preliminary regional rockfall hazard mapping using LIDAR-based slope frequency distribution and CONEFALL modeling

A factor limiting preliminary rockfall hazard mapping at regional scale is often the lack of knowledge of potential source areas. Nowadays, high resolution topographic data (LiDAR) can account for realistic landscape details even at large scale. With such fine-scale morphological variability, quantitative geomorphometric analyses become a relevant approach for delineating potential rockfall instabilities. Using digital elevation model (DEM)-based ?slope families? concept over areas of similar lithology and cliffs and screes zones available from the 1:25,000 topographic map, a susceptibility rockfall hazard map was drawn up in the canton of Vaud, Switzerland, in order to provide a relevant hazard overview. Slope surfaces over morphometrically-defined thresholds angles were considered as rockfall source zones. 3D modelling (CONEFALL) was then applied on each of the estimated source zones in order to assess the maximum runout length. Comparison with known events and other rockfall hazard assessments are in good agreement, showing that it is possible to assess rockfall activities over large areas from DEM-based parameters and topographical elements.

Tackling Sexual Violence and Abuse - A regional Strategy 2008-2013 (PDF 20.2 MB)

Tackling Sexual Violence and Abuse - A regional Strategy 2008-2013

Disability Equipment Services in Northern Ireland Regional Summary (PDF 1815 KB)

March 2003 - main findings of the study, key recommendations and the way forward

Radiology VFM Studies Regional Summary July 1999 (PDF 1435 KB)

Report Published July 1999

Diabetes Services in Northern Ireland Regional Summary August 2002 (PDF 2052 KB)

August 2002 - main findings of study, key recommendations and way forward

Acute Hospital Portfolio Year 3 Regional Summary (PDF 1153 KB)

February 2006 - report providing an overview of the performance of the Northern Ireland Trusts

Acute Hospital Portfolio - Catering Services in Northern Ireland Regional Summary (PDF 105 KB)

March 2003 - sets out the main findings from the study and key conclusions

Air services on thin routes: Regional versus low-cost airlines

An examination of the impact in the US and EU markets of two major innovations in the provision of air services on thin routes - regional jet technology and the low-cost business model - reveals significant differences. In the US, regional airlines monopolize a high proportion of thin routes, whereas low-cost carriers are dominant on these routes in Europe. Our results have different implications for business and leisure travelers, given that regional services provide a higher frequency of flights (at the expense of higher fares), while low-cost services offer lower fares (at the expense of lower flight frequencies). Keywords: air transportation; regional jet technology; low-cost business model; thin markets. JEL Classification Numbers: L13; L2; L93.

Acute Hospital Portfolio - Accicent & Emergency in Northern Ireland Regional Summary (PDF 80 KB)

October 2003 - main findings arising from the study and the key conclusions

Rehabilitation Services for Older People Regional Report (PDF 397 KB)

March 2004 - main findings, key recommendations and the way forward

Acute Hospital Portfolio - Day Surgery in Northern Ireland Regional Summary (PDF 80 KB)

October 2003 - main findings arising from the study and the key conclusions

Mental Health Services for Older People Regional Summary (PDF 217 KB)

June 2004 - study to examine service provision, early identification, information and support, co-ordination of services and strategic planning

Mental Health Services Follow Up Regional Summary (PDF 186 KB)

June 2004 - main findings on progress arising from follow-up, emerging issues, key conclusions

Mental Health Services in NI VFM Review Regional Summary (PDF 1650 KB)

June 2000 - to review whether the strategy for mental health services is based on clearly defined needs