Geohazard Susceptibility Mapping Using Publicly Available Datasets for the Irish Road Network
摘要
To optimise the resilience and future sustainability of a road network, effective asset management is necessary to facilitate the safe working condition of a road network and its users. While asset condition and deterioration are key contributors for informing effective asset management, other external factors, such as natural adverse geological processes (i.e. geohazards), can also influence the approach to proactive management. However, significant financial investment and time is required to acquire accurate datasets to inform on natural factors which influence the susceptibility of a geohazard across a study area. Transport Infrastructure Ireland (TII) commissioned research to proactively use publicly available datasets to create generalised susceptibility maps across the Irish Road Network, and aid in the identification of critical areas which may require further investigation. This paper outlines the process developed for the creation of generalised susceptibility maps for three geohazards relevant for the Irish Road Network, namely compressible soil, karst landforms and slope instability. The process, applied to three counties (Cork, Dublin and Galway), included the selection of natural factors which could be informed through publicly available datasets and the application of multi-criteria analysis to develop susceptibility maps.