Probabilistic Geohazard Assessment: Accounting for Engineered Mitigation

Identifying and assessing geological hazards is critical in managing risk along linear transportation corridors. Traditional rockfall hazard assessments rely on summation-based systems that depend on engineering judgement and field evaluation of rock masses and topography; such systems are widely used across North America by transportation authorities. These systems often fail to adequately account for hazard mitigation through engineered works. This paper presents examples of probabilistic hazard assessment methods for rockfall and river encroachment hazards that affect transportation corridors. These methods were developed for a privately-owned railway and a provincial highway system. Although details of the methods vary, each is based upon estimating the annual probability of hazard occurrence and considering the presence and effectiveness of engineered mitigation structures. Accounting for geohazard mitigation allows owners and operators to better estimate the costs and benefits of hazard reduction efforts.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References;
  • Pagination: pp 103-116
  • Monograph Title: Proceedings of the 67th Highway Geology Symposium (HGS 2016)

Subject/Index Terms

Filing Info

  • Accession Number: 01627832
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 28 2017 9:04AM