Work

Analysis of the Impact of Rainfall in Mountainous Areas of Jeju Island on Stream Flood Discharge

Year: 2024

Type: article

Abstract: Jeju Island frequently suffers significant damage from streams and inland flooding during extreme rainfall events. However, disaster-prevention performance targets, often set using ASOS data from low-lying coastal areas, fail to adequately reflect regional characteristics. To address this issue, this study categorized Jeju Island into coastal, mid-mountain, and mountainous zones based on elevation and conducted a comparative analysis of probable rainfall amounts for streams across these regions. Additionally, the impact of rainfall was examined by comparing flood volumes between adjacent streams originating from different source locations. The analysis revealed that rainfall amounts exceeded disaster prevention performance targets by 24.4% to 64.0%, with rainfall in mountainous areas having the greatest impact on flood volumes in downstream regions. These findings underscore the importance of developing rational solutions through economic and other evaluations when implementing disaster prevention projects and setting disaster response performance targets.

Source: Korean Society of Hazard Mitigation

DOI: 10.9798/kosham.2024.24.6.155

Authors: Boseong Kang, Soohwan Ahn

Institution: Jeju National University

Language: English

Topic: Flood Risk Assessment and Management

Subfield: Global and Planetary Change

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Climate action, Sustainable cities and communities

Open Access status: diamond

Funder: Ministry of the Interior and Safety