基于正交曲线网格的河道地形插值方法及应用  

Channel Terrain Interpolation Method and Its Application Based on Orthogonal Curve Grid

作　　者：郑军[1] 张辛[1] 刘清兰 凡姚申 窦身堂[1] 于守兵[1] ZHENG Jun;ZHANG Xin;LIU Qingan;FAN Yaoshen;DOU Shentang;YU Shoubing(Key Laboratory of Yellow River Sediment,Ministry of Water Resources,Yellow River Institute of Hydraulic Research,Zhengzhou 450003,China;State Key Laboratory of Estuarine and Coastal Science,East China Normal University,Shanghai 200241,China)

机构地区：[1]黄河水利科学研究院水利部黄河下游河道与河口治理重点实验室,河南郑州450003 [2]华东师范大学河口海岸学国家重点实验室,上海200241

出　　处：《人民黄河》2023年第7期62-67,共6页Yellow River

基　　金：国家自然科学基金资助项目(52079056,U2243207);中央级科研院所基本业务费专项(HKY-JBYW-2022-06/11)。

摘　　要：传统的插值方法在采样河道地形横断面分布稀疏情况下,无法有效获得弯曲河道高精度插值结果,亟须研究有效的弯曲河道地形插值新方法,对河道演变及其规律进行定量分析。为此,提出了一种基于正交曲线网格的河道地形插值方法(OCGI),首先沿横断面进行线性插值,然后沿纵向网格线进行插值,弥补了纵向采样点空间分布不足的缺陷,且考虑了河势变化,将插值范围控制在网格分布的区域。应用实例表明:该方法比反距离加权法(IDW)和普通克里金法(KG)能得出更合理的结果,可应用于黄河口尾闾等弯曲河道的地形插值。The traditional interpolation method can’t effectively obtain the high-precision interpolation results of curved channel when the sampling channel topographic cross⁃section is sparse.It is urgent to study an effective new method of curved channel topographic interpolation to quantitatively analyze the channel evolution and its law.In this paper,a channel terrain interpolation method(OCGI)based on orthogonal curve grid was proposed.This method firstly performed linear interpolation along the transverse direction,and then interpolated along the lon⁃gitudinal grid line,which made up for the defect of insufficient spatial distribution of longitudinal sampling points.Considering the change of river regime,the interpolation range was controlled in the area of grid distribution.The application shows that this method can give more rea⁃sonable results than that of IDW and KG methods in cross⁃section sampling data,and can be applied to topographic interpolation of curved channels such as the tail of the Yellow River estuary.

关 键 词：弯曲河道 地形插值 正交曲线网格 断面高程 

分 类 号：P333[天文地球—水文科学] TV882.1[水利工程—水文学及水资源]