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2026 Vol.59, Issue 9
Conceptualization and framework of spatial flood retention technology for urban flood management: Focusing on limitations of conventional systems

도시홍수 대응을 위한 공간저류기술의 개념 정립과 프레임워크: 기존 대응 체계의 한계 분석을 중심으로

Hoje Seonga*
,
Dong-Sop Rheeb
성 호제a*
,
이 동섭b
aSenior Researcher, Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology, Goyang, Korea
bSenior Research Fellow, Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology, Goyang, Korea
a한국건설기술연구원 수자원하천연구본부 수석연구원
b한국건설기술연구원 수자원하천연구본부 연구위원
*Corresponding Author
30 September 2026. pp. 957-970
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Abstract

Urban flood management has traditionally relied on the centralized Collect–Transport–Discharge (CTD) paradigm, which rapidly collects, conveys, and discharges stormwater through drainage infrastructure. However, climate-change-driven extreme rainfall and expanding impervious surfaces have exposed its structural limitations under design-exceedance conditions, as system performance rapidly degrades and runoff becomes concentrated at specific locations. This study reviews the types, research trends, and limitations of existing urban flood management technologies and reinterprets representative international cases, including Room for the River, Floodable Parks, and Water Squares, together with domestic urban retention and inundation mitigation cases, to establish the concept of Spatial Flood Retention Technology (SFRT). SFRT is defined as an approach that controls the spatial distribution of surface runoff and redistributes concentrated flow into designated flood-accommodating spaces, thereby reducing inundation depth and damage intensity. Based on runoff concentration mechanisms and nonlinear flood damage characteristics, this study proposes a conceptual framework that includes applicable urban space types, drainage linkage and recovery conditions, and design principles. SFRT complements conventional technologies by extending the control target from runoff volume and discharge capacity to runoff distribution. Further studies are required to verify the concept through numerical modeling, empirical analysis, safety criteria development, and drainage-system linkage assessment.

Keywords
Urban flood
Spatial flood retention technology
Flow dispersion
Flood-accommodating design
Multifunctional urban space
Conceptual framework

도시홍수 대응 체계는 우수관거, 유수지, 빗물펌프장 등 배수 인프라를 통해 강우 유출을 신속히 수집·이송·배제하는 집중형 배제(Collect–Transport–Discharge, CTD) 방식에 기반하여 발전해왔다. 그러나 기후변화에 따른 극한 강우 증가와 불투수면 확대는 설계 기준을 초과하는 조건에서 기존 체계의 구조적 한계를 드러내고 있으며, 이때 배수 성능은 급격히 저하되고 유출은 특정 지점으로 집중되는 경향을 보인다. 본 연구는 기존 도시홍수 대응 기술의 유형, 연구동향 및 한계를 검토하고, Room for the River, Floodable Parks, Water Squares 등 국외 사례와 국내 도시 저류 및 침수 저감 사례를 재해석하여 공간저류기술(Spatial Flood Retention Technology, SFRT)의 개념을 정립하였다. SFRT는 지표유출의 공간적 분포를 제어하고 집중된 유출을 계획된 침수 허용 공간으로 재분배함으로써 침수심과 피해 강도를 저감하는 접근으로 정의된다. 또한 본 연구는 유출 집중 메커니즘과 침수 피해의 비선형 특성을 바탕으로 적용 가능한 도시 공간 유형, 배수체계 연계 및 기능 회복 조건, 설계 원칙을 포함하는 개념적 프레임워크를 제시하였다. SFRT는 기존 기술을 대체하는 것이 아니라, 유출량 및 배제 용량 중심의 대응을 유출 분포 제어로 확장함으로써 기존 기술을 보완하는 개념이다. 향후 수치모형, 실증 분석, 안전 기준 개발 및 배수체계 연계성 평가를 통해 제안 개념의 타당성을 검증할 필요가 있다.

키워드
도시홍수
공간저류기술
흐름 분산
침수 수용 설계
다기능 도시공간
개념적 프레임워크
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Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 59
  • No :9
  • Pages :957-970
  • Received Date : 2026-04-14
  • Revised Date : 2026-05-19
  • Accepted Date : 2026-06-18
  • DOI :https://doi.org/10.3741/JKWRA.2026.59.9.957
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