Development of an imagery-based monitoring system for nearshore bathymetry by using wave breaking density
Development of an imagery-based monitoring system for nearshore bathymetry by using wave breaking density
复制标题
利用破波密度开发基于图像的近岸测深监测系统
DOI：
10.1080/21664250.2019.1588522
复制
发表时间：
2019
影响因子：
2.4
通讯作者：
Shinji Sato & Yusuke Yamanaka
中科院分区：
文献类型：
--
作者：
Naohiro Hattori;Shinji Sato & Yusuke Yamanaka
开发了一种基于图像的近岸地形监测系统。该系统基于陆基相机观测到的破波密度，并使用深度控制破波模型计算水深。该系统应用于静冈县福冈-浅叶海岸，该地区管道绕砂出口附近的地形变化很快。通过与测深数据的对比，验证了系统的有效性。观测结果表明，该系统能够成功地捕捉到台风引起的近岸水深变化。研究还表明，精度对入射波的特性很敏感，因此可以通过引入选择性平均来提高精度，在选择性平均中，根据目标深度区只使用适当的图像进行深度估计。
An imagery-based monitoring system was developed for nearshore topography. The system was based on the wave breaking density observed using a land-based camera and calculated the bathymetry using a depth-controlled breaking wave model. The system was applied to the Fukude-Asaba Coast, Shizuoka Prefecture, where rapid topography change was expected around the outlet of pipeline-based sand bypassing. The validity of the system was verified through comparisons with bathymetry survey data. It is observed that the system can successfully capture the nearshore bathymetry change owing to a typhoon. It is also suggested that the accuracy is sensitive to the incident wave properties and therefore can be improved by introducing selective averaging in which only appropriate imageries were used for the depth estimation depending on the target depth zones.