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Open AccessArticle

Comparison of Statistical Analysis Models for Susceptibility Assessment of Earthquake-Triggered Landslides: A Case Study from 2015 Earthquake in Lefkada Island

1
Department of Geography, Harokopio University, El. Venizelou 70, 17671 Athens, Greece
2
School of Engineering, Department of Surveying & Geoinformatics Engineering, University of West Attica, Ag. Spyridonos 28, 12243 Athens, Greece
*
Author to whom correspondence should be addressed.
Geosciences 2019, 9(8), 350; https://doi.org/10.3390/geosciences9080350
Received: 1 July 2019 / Revised: 3 August 2019 / Accepted: 7 August 2019 / Published: 9 August 2019
(This article belongs to the Special Issue Analysis of the Kinematic Evolution of Active Landslides)
The main purpose of this study is to comparatively assess the susceptibility of earthquake-triggered landslides in the island of Lefkada (Ionian Islands, Greece) using two different statistical analysis models, a bivariate model represented by frequency ratio (FR), and a multivariate model represented by logistic regression (LR). For the implementation of the models, the relationship between geo-environmental factors contributing to landslides and documented events related to the 17th November 2015 earthquake was investigated by geographic information systems (GIS)-based analysis. A landslide inventory with events attributed to the specific earthquake was prepared using satellite imagery interpretation and field surveys. Eight factors: Elevation, slope angle, slope aspect, distance to main road network, distance to faults, land cover, geology, and peak ground acceleration (PGA), were considered and used as thematic data layers. The prediction capability of the models and the accuracy of the resulting susceptibility maps were tested by a standard validation method, the receiver operator characteristic (ROC) analysis. Based on the validation results, the output map with the highest reliability could potentially constitute an ideal basis for use within regional spatial planning as well as for the organization of emergency actions by local authorities. View Full-Text
Keywords: landslide susceptibility; 2015 earthquake; frequency ratio; logistic regression; GIS; Greece landslide susceptibility; 2015 earthquake; frequency ratio; logistic regression; GIS; Greece
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Polykretis, C.; Kalogeropoulos, K.; Andreopoulos, P.; Faka, A.; Tsatsaris, A.; Chalkias, C. Comparison of Statistical Analysis Models for Susceptibility Assessment of Earthquake-Triggered Landslides: A Case Study from 2015 Earthquake in Lefkada Island. Geosciences 2019, 9, 350.

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