Susceptibility of slopes to earthquake-induced landslides: a new index derived from helicopter-borne electromagnetic resistivity and digital elevation data sets

Nonomura, Atsuko; Hasegawa, Shuichi

doi:10.1007/s10346-017-0873-0

Cited by 3 publications

(6 citation statements)

References 30 publications

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“…The results indicate that areas with lower "average ruggedness of resistivity" are located within the landslide area and areas with higher "average ruggedness of resistivity" are located outside of the landslide area. Based on this, Nonomura and Hasegawa [33] confirmed that loosened rock masses can be identified by using this parameter.…”

Section: Introductionmentioning

confidence: 61%

“…This study attempts to validate the "index of susceptibility for earthquake-induced landslides" (ISEL) by using HEM resistivity data acquired before the 2016 Kumamoto earthquake. These data were processed using the same method as in Nonomura et al [32] and used to calculate the ISEL using the same method as in Nonomura and Hasegawa [33].…”

Section: Methods For Estimating Landslide Susceptibilitymentioning

confidence: 99%

“…In Nonomura and Hasegawa [33], the ISEL was developed as an index of susceptibility for earthquake-induced landslides, which incorporates estimates of rock mass looseness and the topographic amplification of seismic vibration. In this study, the extent to which the ISEL can estimate the occurrence of landslides was validated by using data from landslides triggered by the 2016 Kumamoto earthquake.…”

Section: Index Of Susceptibility For Earthquake-induced Landslidesmentioning

confidence: 99%

“…From this, Nonomura et al [32] developed a parameter for estimating looseness named "average ruggedness of resistivity." Nonomura and Hasegawa [33] validated the parameter's effectiveness in estimating the looseness of rock masses and proposed an index for earthquake-induced landslide (ISEL) susceptibility at the Kanagi landslide where a catastrophic, deep-seated landslide was triggered by the 1707 Hoei earthquake (M 8.6) [34,35]. The "average ruggedness of resistivity" at various locations around the Kanagi landslide was compared based on the assumption that most of the loosened rock masses within the landslide area were removed in the 1707 earthquake, and loosened rock masses outside of the landslide area remain.…”

Section: Introductionmentioning

confidence: 98%

“…Moreover, they assumed that landslides tend to occur on slopes when loosened rock masses are affected by strong tremors during an earthquake and proposed the index of susceptibility for earthquake-induced landslides (ISEL) by multiplying the looseness of bedrock ("average ruggedness of resistivity") by the amplification of seismic vibration on slopes (estimation of topographic effect using DEM) [33].…”

Section: Introductionmentioning

confidence: 99%

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Validation of an Index for Susceptibility to Earthquake-Induced Landslides Derived from Helicopter-Borne Electromagnetic Resistivity and Digital Elevation Data

et al. 2021

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Catastrophic earthquake-induced landslides can occur on slopes composed of loosened and fractured rock masses. Although it is impossible to prevent such landslides, estimation of the susceptibility of slopes to earthquake-induced landslides is useful for risk management. An index of susceptibility to earthquake-induced landslides (ISEL) was developed by using helicopter-borne electromagnetic resistivity data. However, the ISEL has not yet been validated through the analysis of pre-earthquake data. In this study, ISEL values were estimated from resistivity and digital elevation data obtained in 2013 around Mt. Aso, Kyushu, before the 2016 Kumamoto earthquake. Although most of the landslides around Mt. Aso during the 2016 Kumamoto earthquake were mass movements of volcanic tephra layers, some of them occurred on loosened rock masses. Landslide susceptible areas at loosened rock masses are the target for ISEL value estimation. Our results validated the effectiveness of the ISEL as a predictor of earthquake-induced rock mass landslides.

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Section: Introductionmentioning

confidence: 61%

Section: Methods For Estimating Landslide Susceptibilitymentioning

confidence: 99%

Section: Index Of Susceptibility For Earthquake-induced Landslidesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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