Integration of satellite remote sensing and geophysical techniques (electrical resistivity tomography and ground penetrating radar) for landslide characterization at Kunjethi (Kalimath), Garhwal Himalaya, India

Abstract

During the extreme precipitation event of 15th-17th June 2013 in Garhwal Himalaya, glacial lake outburst flooding accompanied by numerous landslides and flash flood events caused widespread death and destruction. Many hill slopes and steep river banks had developed fractures and fissures indicative of landslides and one such scarp was observed at Kunjethi (Kalimath) village on satellite images during routine analysis. Rainfall threshold analysis for years 2012, 2013, 2014 and 2015 has confirmed that it was the main triggering factor which happened due to extreme precipitation in June 2013 leading to scarp development and initiation of landslide. In order to characterize the landslide and get subsurface information, two highly cost-effective and fast non-invasive geophysical techniques, electrical resistivity tomography (ERT) and ground penetrating radar (GPR), were used. Four ERT profiles and one GPR radargram profile were used to determine the approximate depth to slip surface, which is inferred around 15-19 m. Integration of satellite remote sensing, geophysical studies and field observations have been used to demarcate the maximum possible slide zone. This study reiterates that earth observation tools in integration with faster, non-invasive and cost-effective geophysical techniques can establish the slip surface, which is an essential information required for landslide hazard mitigation measures.

Crop Type and Land Cover Mapping in Northern Malawi Using the Integration of Sentinel-1, Sentinel-2, and PlanetScope Satellite Data

“…Wang, Azzari, and Lobell [26] used Landsat data to map crop types in the US Midwest. In terms of land cover type mapping, Kaplan and Avdan [27] fused Sentinel-1 and Sentinel-2 data to map wetlands in Turkey while Slagter et al [28] fused Sentinel-1 and Sentinel-2 data to map wetlands in South Africa. Kannaujiya et al [29] integrated electrical resistivity tomography and ground-penetrating radar to map landslides in Kunjethi, while Yan et al [30] integrated Landsat-8 optical data and Sentinel-1A to detect underground coal fires in China.…”

Pile‐Spacing Calculation of Anti‐Slide Pile Based on Soil Arching Effect

“…Many people worldwide suffer from serious destructions caused by landslides annually [1][2][3][4]. In landslide control, anti-slide piles are regarded as essential [5][6][7].…”

From Its Core to the Niche: Insights from GPR Applications

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