A Preliminary Study for Predicting a Damage Range of Pyroclastic Flows, Lahars, and Volcanic Flood caused by Mt. Baekdusan Eruption

Abstract

Products of the eruption of Mt. Baekdusan are identified as volcanic materials at the estuaries of the Songhuagang river to north, the Dumangang river to east and the Amnokgang river to west. More speficially, pyroclastic flows, lahars and volcanic floods can affect an area of 400km in radius, centering around Lake Cheonji caldera. However, unlike the millenium eruption, the flow situation has been changed. Because multi-purpose dams and reserviors with a combined pondage of mora than 2 billion tons of water have been built in the rivers of which sources are originated from Lake Cheonji caldera. In addition, the flow of fluids expected to take place when the volcano has erupted is thought to be affected by artificial constructions in both direct and indirect ways. This study calculates the direction of fluids flow by using numerical analyses of pyroclastic flows, lahars and volcanic floods that can occur when the volcano of Mt. Baekdusan has erupted. We also estimate the scope of damages by pyroclastic flows, lahars, volcanic flooding caused by the pondage of the dams and water storages in and around Mt. Baekdusan. Pyroclastic flows transported over the steep slopes at the early times of eruptions move over the mountain slopes, affecting airplanes, and lahars due to leaks of Lake Cheonji could reach as far as major rivers and streams near Mt. Baekdusan. Unlike historical accounts, volcanic flood is expected to be limited in its scope of influence to reservoirs bigger than Lake Cheonji in pondage.

Fragility Assessment of Vinyl Greenhouses and Livestock Sheds Subjected to Volcanic Ash Fall Hazards

“…Baekdu, an active volcano under which a magma chamber sits, last erupted in A.D. 946-947, shaping the mountain into its current form. It was one of the most violent volcanic eruptions of the past 2,000 years (Kim et al, 2013). If the mountain erupts again in the future, the related damage will be severe.…”

The Cheonji Lake GeoAI Dataset based in Optical Satellite Imagery: Landsat-5/-7/-8 and Sentinel-2

“…이에 따라 본 논문에서는 백두산 천지의 수체 면적 및 수위 변화를 모니터링하기 위해, 다종 광학 위성영상을 활용 하여 천지 수체 면적에 대한 AI 학습 데이터셋을 구축하였다. 은 약 1,340 mm에 달한다 (Kim et al, 2013)…”