Estimation of distributed flow resistance in vegetated rivers using airborne topo-bathymetric LiDAR and its application to risk management tasks for Asahi River flooding
Estimation of distributed flow resistance in vegetated rivers using airborne topo-bathymetric LiDAR and its application to risk management tasks for Asahi River flooding
复制标题
使用机载地形测深激光雷达估计植被河流的分布式流阻及其在旭河洪水风险管理任务中的应用
DOI：
10.1111/jfr3.12584
复制
发表时间：
2020
影响因子：
4.1
通讯作者：
Koji Mano and Shinya Nigo
中科院分区：
文献类型：
--
作者：
Keisuke Yoshida;Shiro Maeno;Shuhei Ogawa;Koji Mano and Shinya Nigo
本报告描述了一种使用机载激光雷达与近红外和绿色脉冲激光提取植被状况和河流地形水深数据的方法。流阻相关的参数归因于河流中的植被发现使用点云数据的激光雷达与监督分类的支持。从模拟和观测获得的数据的比较被用来评估所提出的方法的适用性，在2011年9月发生在日本的朝日河下游洪水检查。结果表明，本文使用的方法可以估计流阻参数化的植被分布在河段尺度上。本研究还使用数值试验，以阐明建立植被防洪在朝日河下游分叉点使用历史上重要的固定堰的影响。这些数值试验的结果表明，该方法可以阐明有效的手段，管理分歧点周围的植被清除。
This report describes a method of extracting vegetation conditions and topo‐bathymetric data of rivers using airborne LiDAR with near‐infrared and green pulsed lasers. Parameters related to flow resistance attributable to vegetation in rivers were found using point cloud data of LiDAR with support from supervised classification. Comparison of data obtained from simulations and observations was used to assess the applicability of the proposed method for examination of lower Asahi River flooding that occurred in Japan in September 2011. Results demonstrated that the methodology used herein can estimate flow resistance parameterisation of vegetation distributed on a reach scale. This study also used numerical tests to elucidate effects of established vegetation for flood control at the lower Asahi River bifurcation point using a historically important fixed weir. Results of these numerical tests demonstrated that the method can elucidate effective means of managing vegetation removal around the bifurcation point.