Author(s): Gwangmin Ok; Hosoo Lee; Yeonghwa Gwon; Dongsu Kim; Young Do Kim
Linked Author(s): Dongsu Kim, Yeonghwa Gwon, Young C. Kim, YongDo Kim
Keywords: Spectral Data Sewer Pipe Water Depth OBRA Light Source Light Intensity
Abstract: River depth measurement through direct underwater surveys involves relatively high risks, time, and costs. Consequently, various studies have been conducted on techniques utilizing remote sensing. Among these, the method of monitoring water depth using spectral data has been continuously researched and employed from the past to the present. While studies in natural light environments of rivers are ongoing, there is a lack of research in environments such as indoor flume experiments and sewers where specific light sources are absent. This study investigated light sources and illuminance for acquiring accurate spectral data through indoor flume experiments. To minimize the influence of external conditions, experiments were conducted in a dark room setting. Depth estimation was performed by extracting optimal band ratios for each depth using the OBRA (Optimal Band Ratio Analysis) technique, and R2 values of depth according to band ratios were compared and analyzed.
Year: 2025