水土保持研究2025，Vol.32Issue(5)：48-58,11.DOI:10.13869/j.cnki.rswc.2025.05.041
基于无人机影像和三维曲面模拟的淤地坝泥沙量估算
Sediment volume estimation for check dams based on UAV imagery and three-dimensional surface simulation
摘要
Abstract
[Objective]Check dams are essential soil and water conservation engineering measures on the Loess Plateau.Accurate estimation of sediment deposition volume in check dams is important for the scientific evaluation of their soil-water conservation benefits and dynamic safety.[Methods]This study proposed a sediment estimation method for check dams based on high-resolution unmanned aerial vehicle(UAV)imagery and three-dimensional surface reconstruction technology.Taking the Jiuyuangou watershed as an example,UAV imagery was utilized to extract the terrain surface model of check dams,and 30 empty gullies were randomly selected to establish virtual dams.Four methods(second-order polynomial,third-order polynomial,smoothing spline,and binomial index)were employed to simulate the longitudinal valley lines and transverse gully slope lines of the virtual dams.The reliability of these methods was verified using empty gully topographic data.A digital terrain network based on the optimal reconstructed characteristic lines was established,and spatial interpolation was performed with the Hutchinson algorithm to generate the original surface of the check dams.Using the reconstructed check dam surface and actual dam parameters as references,the sediment deposition volume was estimated through 3D analyst model.[Results](1)among the four methods,the binomial index model achieved the highest accuracy,with root mean square errors(RMSE)of 1.305 m and 2.958 m for the simulated longitudinal and transverse gully slope lines,respectively.Additionally,R² values exceeded 0.994 and 0.967,respectively.(2)The three-dimensional surfaces of 30 virtual dams simulated using the Hutchinson spatial interpolation method had an RMSE of 1.03 m compared to the actual terrain,with R² exceeding 0.998.(3)The proposed model estimated sediment volume for the 30 virtual dams with an average error rate of 6.54%.[Conclusion]The proposed method demonstrates high accuracy and reliability,enabling rapid and accurate estimation of sediment deposition in single-gully check dams on the Loess Plateau.关键词
淤地坝/三维曲面/无人机/泥沙体积估算Key words
check dam/three-dimensional surface/unmanned aerial vehicle/sediment volume estimation分类
天文与地球科学引用本文复制引用
张晨,常潇笛,赵建林,汪珍亮,杨节..基于无人机影像和三维曲面模拟的淤地坝泥沙量估算[J].水土保持研究,2025,32(5):48-58,11.基金项目
陕西林业科技创新重点专项(SXLK2023-02-15) （SXLK2023-02-15）
国家自然科学基金(41907048) （41907048）
中央高校基本科研费专项资金(300102260206) （300102260206）
