Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Development of a disaster index for quantifying damages to wastewater treatment systems by natural disasters

하수처리시설의 자연 재해 영향 정량화 지수 개발 연구

  • Park, Jungsu (Department of Civil and Environmental engineering, Hanbat National University) ;
  • Park, Jae-Hyeoung (GNC ENVIRONMENTAL SOLUTION) ;
  • Choi, June-Seok (Department of Land, Water and Environment Research, Korea Istitute of Civil Engineering and Building Technology) ;
  • Heo, Tae-Young (Department of Information & Statistics, Chungbuk National University)
  • 박정수 (국립한밭대학교 건설환경공학과) ;
  • 박재형 (지엔씨환경솔루션) ;
  • 최준석 (한국건설기술연구원 국토보전연구본부) ;
  • 허태영 (충북대학교 정보통계학과)
  • Received : 2020.11.26
  • Accepted : 2020.12.24
  • Published : 2021.02.15
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Abstract

The quantified analysis of damages to wastewater treatment plants by natural disasters is essential to maintain the stability of wastewater treatment systems. However, studies on the quantified analysis of natural disaster effects on wastewater treatment systems are very rare. In this study, a total disaster index (DI) was developed to quantify the various damages to wastewater treatment systems from natural disasters using two statistical methods (i.e., AHP: analytic hierarchy process and PCA: principal component analysis). Typhoons, heavy rain, and earthquakes are considered as three major natural disasters for the development of the DI. A total of 15 input variables from public open-source data (e.g., statistical yearbook of wastewater treatment system, meteorological data and financial status in local governments) were used for the development of a DI for 199 wastewater treatment plants in Korea. The total DI was calculated from the weighted sum of the disaster indices of the three natural disasters (i.e., TI for typhoon, RI for heavy rain, and EI for earthquake). The three disaster indices of each natural disaster were determined from four components, such as possibility of occurrence and expected damages. The relative weights of the four components to calculate the disaster indices (TI, RI and EI) for each of the three natural disasters were also determined from AHP. PCA was used to determine the relative weights of the input variables to calculate the four components. The relative weights of TI, RI and EI to calculate total DI were determined as 0.547, 0.306, and 0.147 respectively.

Keywords

Acknowledgement

본 결과물은 환경부의재원으로 한국환경산업기술원의 환경시설 재난재해 대응기술 개발사업의 지원을 받아 연구되었습니다.(2019002870001)

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