Real-Time Flood Forecasting by Using a Measured Data Based Nomograph for Small Streams

Tae Sung Cheong; Changwon Choi; Sung Je Yei; Kang Min Koo

doi:10.17820/eri.2023.10.4.116

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Original Article

Real-Time Flood Forecasting by Using a Measured Data Based Nomograph for Small Streams 계측자료 기반 Nomograph를 이용한 실시간 소하천 홍수량 산정 연구

31 December 2023. pp. 116-124

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Abstract

As the flood damage on small streams increase due to the increase in frequency of extreme climate events, the need to measure hydraulic data of them has increased for disaster risk management. National Disaster Management Institute, Ministry of Interior and Safety develops CADMT, a CCTV-based automatic discharge measurement technology, and operates pilot small streams to verify its performance and develop disaster risk management technology. The research selects two small streams such as the Neungmac and the Jungsunpil streams to develop the Nomograph by using the 4-Parameter Logistic method using only the observed rainfall data from the Automatic Weather System operated by the Korea Meteorological Agency closest to the small streams and discharge data collected by using the CADMT. To evaluate developed Nomograph, the research forecasts floods discharges in each small stream and compares the result with the observed discharges. As a result of the evaluations, the forecasted value is found to represent the observed value well, so if more accurate observed data are collected and the Nomograph based on it is developed in the future, the high-accuracy flood prediction and warning will be possible.

Keywords

CADMT

Flood early warning

Nomograph

Small streams

극한호우 발생빈도 증가로 소하천 홍수 피해가 증가하고 있어 소하천 리스크 관리를 위해 유량 계측 요구가 증가하고 있다. 이에 행정안전부 (MOIS) 소속 국립재난안전연구원 (NDMI)은 CCTV 기반 자동유량계측기술 (CCTV based Automatic Discharge Measurement Technology, CADMT)을 개발하고 성능 검증과 재난 리스크 관리기술 개발을 위해 시범소하천을 운영하고 있다. 본 연구는 CADMT가 설치된 능막천과 중선필천 2개 소하천을 선정하고 소하천에 가장 가까운 기상청 Automatic Weather System 강우량 자료와 유량 계측자료를 이용해 4-Parameter Logistic 방법으로 Nomograph를 개발한다. 개발한 Nomograph를 검증하기 위하여 본 연구는 각 소하천에서 홍수량을 예측하고 그 결과를 계측 유량과 비교한다. 검증 결과 예측치는 계측치를 잘 재현하는 것으로 나타나 향후, 보다 정확도 높은 계측자료가 수집되고 이에 기반한 Nomograph가 개발된다면 정확도 높은 홍수 예･경보가 가능할 것으로 판단된다.

키워드

CCTV 기반 자동유량계측기술

홍수 예･경보

Nomograph

소하천

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Information

Publisher :Korean Society of Ecology and Infrastructure Engineering
Publisher(Ko) :응용생태공학회
Journal Title :Ecology and Resilient Infrastructure
Journal Title(Ko) :응용생태공학회 논문집
Volume : 10
No :4
Pages :116-124
Received Date : 2023-12-11
Revised Date : 2023-12-12
Accepted Date : 2023-12-12
An Erratum to this article was published on 31 March 2024.

This article has been updated.
DOI :https://doi.org/10.17820/eri.2023.10.4.116

Ecology and Resilient Infrastructure ISSN:2288-8527(Online) 응용생태공학회 논문집

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