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2025 Vol.58, Issue 12S-4 Preview Page

Special Issue: Blue-Green-Grey 도시홍수 방어

Experimental study on the effects of grate shape on flow characteristics

빗물받이 형상에 따른 흐름 특성에 관한 실험적 연구

Hyojung Leea
,
Sanghwa Jungb
,
Jongmin Kimc*
이 효정a
,
정 상화b
,
김 종민c*
aStudent Researcher, Department of Hydro Science and Engineering Research River Experiment Center, Korea Institute of Civil Engineering and Building Technology, Andong, Korea
bResearch Fellow, Department of Hydro Science and Engineering Research River Experiment Center, Korea Institute of Civil Engineering and Building Technology, Andong, Korea
cResearch Specialist, Department of Hydro Science and Engineering Research River Experiment Center, Korea Institute of Civil Engineering and Building Technology, Andong, Korea
a한국건설기술연구원 수자원하천연구본부 하천실험센터 학생연구원
b한국건설기술연구원 수자원하천연구본부 하천실험센터 센터장
c한국건설기술연구원 수자원하천연구본부 하천실험센터 전임연구원
*Corresponding Author
31 December 2025. pp. 1605-1615
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Abstract

With the increasing frequency of extreme rainfall events due to climate change, urban flooding has become a growing concern, especially on impervious road surfaces where inundation can directly result in property damage and threats to human life. This study experimentally investigated the hydraulic performance of four types of stormwater inlets—standard, aesthetic, filter, and flap-lid types—by analyzing changes in water depth, flow velocity, and discharge. The results showed that the standard inlet (General) demonstrated the most effective performance in terms of both inflow and drainage capacity, while the aesthetic inlet (Design) exhibited the lowest performance due to limited inflow and reduced flow velocity. Additionally, a third-degree polynomial equation was derived to represent the correlation between the permeable surface area and the discharge through the inlets, which may serve as a useful reference for future inlet design. This study emphasizes that stormwater inlet design should not rely solely on visual or aesthetic considerations but must comprehensively address inflow efficiency, flow stability, and the long-term hydraulic safety of the structure. The findings are expected to contribute to the improvement of technical standards and design practices for urban drainage systems. However, this study was limited to four representative inlet types; thus, further experiments involving a wider range of inlet shapes and structures installed in Korea are needed to establish more generalized correlations.

Keywords
Grate shape
Hydraulic Experiment
Water depth
Velocity
Discharge

최근 기후변화로 인한 극한강우 발생 빈도의 증가로 도시 내 침수 문제가 심화되고 있으며, 특히 불투수면적이 넓은 도로에서의 침수는 재산 및 인명피해로 이어질 수 있어 효과적인 배수 대책 마련이 요구된다. 이에 본 연구는 도시 침수 저감을 위한 배수 성능 개선을 목적으로, 일반형, 디자인형, 필터형, 개폐형 등 4가지 빗물받이 형상을 대상으로 수심, 유속, 유량의 변화 특성을 실험적으로 분석하였다. 실험 결과, 일반형은 가장 우수한 유입 및 배수 성능을 보였으며, 디자인형은 차집량 부족과 유속 저하 등으로 가장 낮은 성능을 나타냈다. 또한, 측구 차집 유량과 투수면적 간 상관관계를 분석하여 선형 관계식을 도출하였으며, 이는 향후 빗물받이 설계 시 활용 가능한 기초자료로 활용될 수 있다. 본 연구는 빗물받이 설계 시 단순한 미관 중심의 접근에서 벗어나, 수리적 성능을 종합적으로 고려해야 함을 강조하며, 도시 배수 계획 및 시설물 설계 기준 개선에 기여할 수 있을 것으로 기대된다. 다만, 본 연구는 4가지 형상에 한정된 실험으로 이루어졌으며, 향후에는 다양한 형상을 대상으로 한 추가 연구를 통해 보다 정교한 상관관계를 제시할 필요가 있다.

키워드
빗물받이 형상
수리실험
수심
유속
유량
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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 : 58
  • No :12
  • Pages :1605-1615
  • Received Date : 2025-07-30
  • Revised Date : 2025-11-12
  • Accepted Date : 2025-11-18
  • DOI :https://doi.org/10.3741/JKWRA.2025.58.S-4.1605
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