Risk-based analysis of monitoring time intervals for landslide prevention

Abstract

Abstract.Landslide is one of the most dangerous disasters in terms of occurrence frequency and damage severity that result in loss of human life and social infrastructure. Monitoring methods based on low temporal resolution instruments such as an inclinometer or piezometer can be an effective and cost-efficient solution. The objective of this research is to analyse monitoring time 15 intervals for low temporal resolution methods based on a risk study and to propose a plan for periodic landslide monitoring along with the different landslide hazard areas by considering the risk reduction effect. For this purpose, an equation for the probability of landslide occurrence was denoted by the concept of reliability, and the monitoring time interval was analysed quantitatively by calculating the average probability of landslide occurrence. To identity the frequency of landslide occurrence, a unit of relative temporal frequencies was adopted, and it was estimated by establishing rainfall threshold. As a case study 20 site, Pyeongchang County was selected, where landslide inventory data are available and an increase in population and infrastructure has been observed since Pyeongchang became the host city of the 2018 winter Olympic games. The result demonstrates that the appropriate monitoring intervals can be determined by calculating the average probability of landslide occurrence, and resources can then be allocated efficiently for landslide prevention.

Landslide risk management analysis on expansive residential areas. Case study of La Marina (Alicante, Spain)

“…Typical damage produced by shallow slides in the study area is shown by cracks opening up in the buildings' walls. This type of damage caused by landslides in buildings is classified by Leone (1996) at level III (from I to V), which corresponds to a structural damage of 0.4-0.6 on a scale ranging from 0 to 1. Taking into account the previous example and the fact that shallow slide characteristics in the study zone do not vary too much in terms of affected area, depth of the slip surface, velocity, volume and typical damage, we assumed a single fixed value for LM (in accordance with the level of susceptibility).…”

“…Specifically, landslides are one of the most dangerous natural disasters in terms of their frequency and the seriousness of the damage they do, leading to loss of human life and social infrastructure in practically the whole world, which has been increas-I. Cantarino et al: Landslide risk management analysis on expansive residential areas ing in recent decades (Lee et al, 2017;Sandić et al, 2017;Cascini et al, 2005).…”

Landslide risk management analysis on expansive residential areas – case study of La Marina (Alicante, Spain)

“…Specifically, landslides are one of the most dangerous natural disasters in terms of their frequency and the seriousness of the damage they do, leading to loss of human life and social infrastructure in practically the whole world, which has been increas-I. Cantarino et al: Landslide risk management analysis on expansive residential areas ing in recent decades (Lee et al, 2017;Sandić et al, 2017;Cascini et al, 2005).…”