Analysis of the Applicability of Damage Assessment Methods for Downstream Impact Based on Probable Maximum Flood Design in Agricultural Reservoir

Donghyuk Joo; Ra Na; Ha-Young Kim; Uigeon So; Inhong Song; Sunghack Lee; Gilchai Shin; Kyuhyun Shim; Gun Heo; Seung-Hwan Yoo

doi:10.5389/KSAE.2025.67.3.059

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Analysis of the Applicability of Damage Assessment Methods for Downstream Impact Based on Probable Maximum Flood Design in Agricultural Reservoir 농업용 저수지의 가능최대홍수량 설계를 위한 하류부 피해 산정 방안 적용성 분석

2025. pp. 59-70

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Abstract

The Korean Rural Community Corporation (KRC) classifies Ⅰ reservoirs as those with storage capacities of 300,000 m³ or more, requiring safety inspections, detailed diagnostics, and seismic performance evaluations. Despite these standards, Typhoon Hinnamnor in 2022 caused slope collapses in Wangsin Reservoir (1.83 million m³), triggering emergency evacuations downstream. Revised 2023 design standards mandate the design flood as the maximum of 200-year probability flood, historical maximum flood, or regional maximum flood, with adjustments for fill dams and areas with severe potential damage. However, application methodologies and foundational data remain insufficient, especially for assessing human and material damage. This study analyzed floodplain maps from Emergency Action Plan for 242 reservoirs, using K-FRM to estimate damages by human, urban, agricultural, and public categories. Correlation analyses indicated limited relationships between reservoir specifications and damages, suggesting external factors like urbanization and soil conditions play significant roles. Evaluation of fatalities revealed inconsistencies in reservoir classification based on statistical criteria. Adopting international standards, such as applying PMF for cases with fatalities, could enhance practicality and ensure policy alignment. The study emphasizes fatalities and injuruies as a primary metric for PMF application, supported by material damage as a supplementary factor, providing a basis for revising guidelines and improving agricultural reservoir resilience.

Keywords

PMF

K-FRM

downstream damage

design standandards

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Information

Publisher :The Korean Society of Agricultural Engineers
Publisher(Ko) :한국농공학회
Journal Title :Journal of Korean Society of Agricultural Engineers
Journal Title(Ko) :한국농공학회논문집
Volume : 67
No :3
Pages :59-70
Received Date : 2024-12-18
Revised Date : 2025-03-05
Accepted Date : 2025-03-10
DOI :https://doi.org/10.5389/KSAE.2025.67.3.059

Journal of Korean Society of Agricultural Engineers ISSN:1738-3692(Print) 2093-7709(Online) 한국농공학회논문집

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