Dynamic path-dependent landslide susceptibility modelling
Open Access
- 22 January 2020
- journal article
- research article
- Published by Copernicus GmbH in Natural Hazards and Earth System Sciences
- Vol. 20 (1), 271-285
- https://doi.org/10.5194/nhess-20-271-2020
Abstract
This contribution tests the added value of including landslide path dependency in statistically based landslide susceptibility modelling. A conventional pixel-based landslide susceptibility model was compared with a model that includes landslide path dependency and with a purely path-dependent landslide susceptibility model. To quantify path dependency among landslides, we used a space–time clustering (STC) measure derived from Ripley's space–time K function implemented on a point-based multi-temporal landslide inventory from the Collazzone study area in central Italy. We found that the values of STC obey an exponential-decay curve with a characteristic timescale of 17 years and characteristic spatial scale of 60 m. This exponential space–time decay of the effect of a previous landslide on landslide susceptibility was used as the landslide path-dependency component of susceptibility models. We found that the performance of the conventional landslide susceptibility model improved considerably when adding the effect of landslide path dependency. In fact, even the purely path-dependent landslide susceptibility model turned out to perform better than the conventional landslide susceptibility model. The conventional plus path-dependent and path-dependent landslide susceptibility model and their resulting maps are dynamic and change over time, unlike conventional landslide susceptibility maps.Keywords
This publication has 40 references indexed in Scilit:
- Automatic delineation of geomorphological slope units with r.slopeunits v1.0 and their optimization for landslide susceptibility modelingGeoscientific Model Development, 2016
- Very-High Resolution Stereoscopic Satellite Images for Landslide MappingPublished by Springer Science and Business Media LLC ,2013
- Factors selection in landslide susceptibility modelling on large scale following the gis matrix method: application to the river Beiro basin (Spain)Natural Hazards and Earth System Sciences, 2012
- Distribution pattern of earthquake-induced landslides triggered by the 12 May 2008 Wenchuan earthquakeGeomorphology, 2011
- Comparing landslide inventory mapsGeomorphology, 2008
- Identification and mapping of recent rainfall-induced landslides using elevation data collected by airborne LidarNatural Hazards and Earth System Sciences, 2007
- WEAK CLIMATIC CONTROL OF STAND-SCALE FIRE HISTORY DURING THE LATE HOLOCENEEcology, 2006
- Information Theory and an Extension of the Maximum Likelihood PrinciplePublished by Springer Science and Business Media LLC ,1998
- Second-order analysis of space-time clusteringStatistical Methods in Medical Research, 1995
- GIS techniques and statistical models in evaluating landslide hazardEarth Surface Processes and Landforms, 1991