Abstract
Abstract. Vulnerability identifies the element-at-risk as well as the evaluation of their relationships with the hazard. The relationships relate the landslide potential damages over a specific element-at-risk. Vulnerability can be defined as the degree of loss to a given element-at-risk or set of elements at risk resulting from the occurrence of a natural phenomenon of a given magnitude and expressed on a scale from 0 (no damage) to 1 (total damage). In this study, the landslide vulnerability mapping and analysis were made on two element-at-risks namely buildings and roads. Based on field observations, building and road construction materials have been classified into 22 and 5 construction materials respectively. The field visits were made on specific areas based on candidate buildings and roads as chosen during the landslide exposure analysis and mapping. The vulnerability values for these element-at-risks were expressed using expert opinion. Four experts have been interviewed with separate sessions. The experts were also supplied with local information on the landslides occurrences and photos of element-at-risk in Kundasang and Kota Kinabalu. The vulnerability matrices were combined based on the weighted average approach, in which higher weight was assigned to panel with local expert (landslides and damage assessment), wide experience in landslide vulnerability analysis, hazard and risk mapping. Finally, the vulnerability maps were produced for Kundasang and Kota Kinabalu with spatial resolution of 25 cm. These maps were used for the next step i.e. landslide risk mapping and analysis.
Highlights
One of the most critical steps towards risk analysis is the determination of landslides vulnerability
The vulnerability assessment and mapping is based on vulnerability matrices generated using expert opinion
The experts have been selected based on several conditions that account their experiences and knowledge on landslide vulnerability and damage assessments
Summary
One of the most critical steps towards risk analysis is the determination of landslides vulnerability. Social vulnerability focuses on indicator, based methods where this indicator is defined asa variable which is an operational representation of a characteristic or quality of a system able to provide information regarding the susceptibility, coping capacity and resilience of a system to an impact of an albeit ill-defined event linked with a hazard of natural‘ In another hand, physical vulnerability is generally defined as a scale ranging from 0 (no loss/damage) to 1 (total loss/damage), representing the degree of loss/potential damage of the element-at-risk. Previous study by Leone et al (1996) damage matrices were suggested based on damaging factors and the resistance of the elements at risk to the impact of landslides The applicability of this method requires statistical analysis of detailed records on landslides and their consequences (Dai et al, 2002).
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