摘要
Abstract
To improve the efficiency of calculating river channel erosion and sedimentation and address the issues of large errors in manual estimation,time-consuming and labor-intensive field measurements,and the inability to perform large-scale operations,a fast calculation and statistical model was developed.This model,based on optical satellite remote sensing data and airborne LiDAR data,was applied to Men-tougou District and Fangshan District,where severely impacted by the"23·7"catastrophic flood.By us-ing remote sensing and GIS techniques,the rapid extraction and calculation of river channel erosion and deposition were achieved.The results showed that for the 8 key river channels in the study area,the flood scar area,sedimentation area,and erosion area were 5,276.67,3.545.34 and 1,731.33 million square me-ters,respectively,with sedimentation and erosion volumes of 3,535.86 and 3,106.79 million cubic me-ters.For the 103 mountain flood channels,the flood scar area,sedimentation area,and erosion area were 3,301.66,1,567.51 and 1,734.18 million square meters,respectively,with sedimentation and erosion volumes of 1,513.70 and 1,896.05 million cubic meters.The overall root mean square error was 0.226.This research provides valuable data support for the dredging and management of disaster-stricken rivers.关键词
河道冲淤/快速计算/海河"23·7"流域性特大洪水/激光雷达Key words
river erosion and sedimentation/rapid calculation/Haihe River"23·7"catastrophic flood/LiDAR分类
水利科学
