A Study of Disaster Prevention and Characteristics of Landslides Triggered by the 2019 Typhoon Mitag in Samcheok

Abstract

Close on the heels of the East Coast Forest Fires (ECFF) in April 2000, Samcheok in the region witnessed landslides in October 2019. Therefore, it is imperative to understand the association between forest fire and slope stability. Accordingly, survey plots were set up around the site of the landslide to investigate micro-topography, forest structure, and growth environment. The results revealed that B plots scored high on appearance and the density of trees, while A plots had high values on the H/D ratio. Further, it is important to control tree density in the restored forests because the H/D ratio, which induces slope stability, exceeds suitable values at both A and B plots, resulting in intense competition among the trees growing in the affected sites. The findings are useful for proposing a mountain management project to prevent sediment-related disasters. Moreover, they would aid in evaluating the root cohesion of trees contributing to slope stability on the east coast region of Gangwon-do, which is prone to disasters such as large-scale forest fires, heavy rains, and landslides.

Two approaches to prepare cationic lignin‐based adsorbents for efficient removal of phosphate ion from wastewater

“…7,8 The adsorption method has been extensively investigated, owing to its favorable properties, including high adsorption capacity, easy operation procedure, environmentally friendly, and low cost. 9,10 Adsorbents with cationic groups or porous structure, for example, biochar, 11 layered double hydroxides, 12 metal-organic frameworks, 13 biomass-based materials, 14 clay minerals, 15 and zeolites, 16 have been confirmed to perform a critical function in the elimination of phosphate ion from wastewater. Among these adsorbents, biomass-based materials from lignin, cellulose, and so forth, have been attracting extensive interest from researchers due to the abundant, environmental-friendly, and biodegradable properties of biomass.…”

“…However, the application of biological or chemical methods is restricted by their complex operational process, high production costs, and secondary pollution 7,8 . The adsorption method has been extensively investigated, owing to its favorable properties, including high adsorption capacity, easy operation procedure, environmentally friendly, and low cost 9,10 . Adsorbents with cationic groups or porous structure, for example, biochar, 11 layered double hydroxides, 12 metal–organic frameworks, 13 biomass‐based materials, 14 clay minerals, 15 and zeolites, 16 have been confirmed to perform a critical function in the elimination of phosphate ion from wastewater.…”

New Evacuation Management Criteria for Potential Landslides Based on Experimental Studies

“…Various studies have been conducted to respond to increasing landslide damage including studies related to the cause and characteristics of landslides (Song and Hong, 2007;Choi et al, 2011), the evaluation of vulnerabilities to landslide damage (Kang and Kim, 2015;Kim et al, 2019), landslide prevention and restoration measures (Lee et al, 2018;Jang et al, 2020), and the establishment and operation of evacuation management criteria to reduce human casualties from landslides (Park et al, 2018).…”