KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Comparison and Analysis of Observation Data of Rainfall Sensor for Vehicle and Rainfall Station

차량용 강우센서와 강우관측소 관측자료 비교분석

  • 이충대 (한국수자원조사연구원 영산강조사실) ;
  • 이병현 (국립강원대학교 도시환경.재난관리 전공) ;
  • 조형제 (한국수자원조사연구원 영산강조사실) ;
  • 김병식 (국립강원대학교 도시환경.재난관리 전공)
  • Received : 2018.10.01
  • Accepted : 2018.11.05
  • Published : 2018.12.01
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Abstract

The biased estimation of low density rainfall network and radar rainfall has limited application to extreme rainfall in a small area. To improve this, more rainfall information needs to be produced. In this study, we analyzed the applicability of the vehicle rainfall sensor developed and used recently. The developed rainfall sensor was attached to the vehicle to observe the rainfall according to the movement of the vehicle. The analytical method used time series and average rainfall values for observations of rainfall sensors and nearby rainfall stations. The results show that the trend of observed values according to rainfall events shows a certain pattern. It is analyzed that it is caused by various causes such as the difference between the observation position of the rainfall sensor and the nearby rainfall station, the moving speed of the vehicle, and the rainfall observation method. This result shows the possibility of rainfall observation using a rainfall sensor for a vehicle, and it is possible to observe rainfall more precisely through experiments and improvement of rainfall sensors in various conditions in the future.

낮은 밀도의 강우관측망과 레이더 강우의 편향적인 추정은 좁은 지역에서 발생하는 돌발홍수에 대한 적용에는 한계가 있다. 이를 개선하기 위해서는 더 많은 강우정보의 생산이 필요하다. 본 연구에서는 최근에 개발되어 활용되고 있는 차량용 강우센서를 이용하여 적용성을 분석하였다. 개발된 강우센서를 차량에 부착하여 차량의 이동에 따른 강우 관측을 수행하였다. 분석 방법은 강우센서와 인근 강우관측소의 관측값에 대하여 시계열 및 평균 강수량을 이용하였다. 차량별로 부착된 센서(1~10번)의 관측 강우를 분석한 결과 전체적으로 센서별로 상대적으로 차이가 발생하고 있으나 강우 사상에 따른 관측값의 경향은 일정한 패턴을 나타내고 있는 것을 알 수 있었다. 이는 강우센서의 관측위치와 인근 강우관측소와의 거리 차이, 차량의 이동 속도, 강우관측 방법 등 다양한 원인에 의해 발생하는 것으로 분석되었다. 이 결과는 차량용 강우센서를 이용한 강우관측의 가능성을 보여주었으며 향후 다양한 조건에서의 실험 및 강우센서 개선을 통하여 보다 정밀한 강우관측이 가능할 것으로 검토되었다.

Keywords

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Fig. 1. Study Area and Sites Using This Study

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Fig. 2. Operating Principle of Vehicle Rain Sensor

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Fig. 3. Observation Radar Image by Rain Sensor

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Fig 4. Rain Sensor and Station Rainfall Comparison

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Fig 4. Rain Sensor and Station Rainfall Comparison (Continue)

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Fig 4. Rain Sensor and Station Rainfall Comparison (Continue)

Table 1. Comparison of Existing Rainfall Sensor and Developed Rainfall Sensor

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Table 2. Receiver Operating Characteristic Method

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Table 3. Results of Receivers Operating Characteristic

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Table 4. Result of Receiver Operating Characteristic

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