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2024 Vol.57, Issue 12S Preview Page

Research Article

Water depth monitoring method for stormwater and sewer pipes using spectral data

분광정보를 활용한 우수관 및 하수관 수심 모니터링 방안

Hosoo Leea
,
Gwangmin Okb
,
Yeounghwa Gwonc
,
Dongsu Kimd
,
Young Do Kime*
이 호수a
,
옥 광민b
,
권 영화c
,
김 동수d
,
김 영도e*
aPh.D. Course, Department of Civil and Environmental Engineering, Myongji University, Yongin, Korea
bMaster Course, Department of Civil and Environmental Engineering, Myongji University, Yongin, Korea
cPh.D. Course, Department of Civil and Environmental Engineering, Dankook University, Yongin, Korea
dProfessor, Department of Civil and Environmental Engineering, Dankook University, Yongin, Korea
eProfessor, Department of Civil and Environmental Engineering, Myongji University, Yongin, Korea
a명지대학교 토목환경공학과 박사과정
b명지대학교 토목환경공학과 석사과정
c단국대학교 토목환경공학과 박사과정
d단국대학교 토목환경공학과 교수
e명지대학교 토목환경공학과 교수
*Corresponding Author
31 December 2024. pp. 1177-1185
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Abstract

This study aims to develop flow monitoring technology for urban flood defense in sewer and stormwater drainage systems. As urban flooding damage increases due to rapid climate change and intense rainfall, the importance of monitoring existing sewer and stormwater drainage systems is becoming more critical. Traditional measurement methods based on water level-discharge relationship curves through water level gauges suffer from reduced accuracy due to sediment accumulation and variations in internal pipe flow, which limits the performance evaluation of flood defense infrastructure. To overcome these limitations, this study proposes a contactless monitoring approach that measures depth rather than water level within sewer pipes by utilizing spectral data. A method to measure the depth in sewer and stormwater pipes using the OBRA technique with multispectral sensors was developed. Experiments were conducted under various light source and illumination conditions using a monitoring chamber to ensure accurate data collection and analysis. Additionally, an algorithm was implemented using Python's OpenCV library to correct positional errors that may occur during multispectral image analysis, enhancing measurement accuracy. The disparity correction using tracking points minimized discrepancies between images, enabling the collection of reliable data. Furthermore, based on experimental results, the effects of light source types and illumination changes on depth measurements were analyzed. Subsequently, the study evaluated the accuracy of the proposed depth measurement approach by comparing and analyzing flow estimation methods based on depth assessment using spectral data against supply flow data. This study presents a novel methodology to address the limitations of existing sewer and stormwater monitoring technologies and is expected to contribute to the enhancement of real-time monitoring technology in urban flood response systems.

Keywords
Spectral data
Sewer pipes
Stormwater pipes
Water depth
Light source
Non-contact
OBRA
Monitoring chamber

본 연구는 기존의 하수관 및 우수관 모니터링 기술이 가지는 한계를 극복하기 위한 새로운 방법론을 제시하며, 도시 홍수 대응 시스템의 실시간 모니터링 기술 향상에 기여할 수 있을 것으로 기대된다. 본 연구는 도시 홍수 방어를 위한 하수관 및 우수관의 유량 모니터링 기술 개발을 목표로 한다. 최근 급격한 기후 변화와 집중호우로 인한 도시 내 침수 피해가 증가하면서 기존 하수 및 우수 관거 시스템에 대한 모니터링의 중요성이 더욱 강조되고 있다. 기존 수위계를 통한 수위-유량 관계곡선 기반 측정 방식은 퇴적물 발생과 관 내부 흐름 변화 등으로 인해 정확도가 저하되며, 이로 인해 홍수 방어 인프라의 성능 평가에 한계가 발생한다. 본 연구에서는 이러한 한계를 극복하기 위해 비접촉식 분광 정보를 활용하여 하수관 내 수위가 아닌 수심을 모니터링할 수 있는 방안을 제시한다. 다분광 센서를 이용한 OBRA 기법을 통해 하수 및 우수관의 수심을 측정하는 방법을 개발하였으며, 모니터링 챔버를 활용하여 다양한 광원과 조도 조건 하에서 실험을 진행하여 정확한 데이터 수집과 분석을 수행하였다. 또한, 파이썬의 OpenCV 라이브러리를 이용하여 다분광 이미지 분석 중 발생할 수 있는 위치 오차를 보정하는 알고리즘을 도입하여 측정의 정확성을 향상시켰다. 추적점을 이용한 간격 보정 작업은 이미지 간 불일치를 최소화하여 신뢰성 있는 데이터 확보를 가능하게 했다. 실험 결과를 바탕으로 광원 종류와 조도 변화가 수심 측정에 미치는 영향을 분석하고, 이를 바탕으로 공급유량과 분광 정보를 이용한 수심 산정 기반 유량 측정 기법을 비교·분석하여 본 연구의 수심 측정 방법의 정확도를 평가하였다. 본 연구는 기존 하수관 및 우수관 모니터링 기술의 한계를 극복하기 위한 새로운 방법론을 제시하며, 도시 홍수 대응 시스템의 실시간 모니터링 기술 향상에 기여할 수 있을 것으로 기대된다.

키워드
분광 정보
하수관
우수관
수심
광원
비접촉식
OBRA
모니터링 챔버
References
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10.22761/GD.2023.0033
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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 : 57
  • No :12
  • Pages :1177-1185
  • Received Date : 2024-10-15
  • Revised Date : 2024-11-11
  • Accepted Date : 2024-11-15
  • DOI :https://doi.org/10.3741/JKWRA.2024.57.S-1.1177
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