Dam & Safety ›› 2026, Vol. 0 ›› Issue (5): 56-.

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Study on underwater topography modeling method for river channels based on spatial correlation

YE Yanping   

  1. Zhejiang Huadong Mapping and Engineering Safety Technology Co., Ltd.
  • Received:2025-03-11 Online:2026-10-08 Published:2026-10-28

基于空间相关性的河道水下地形建模方法研究

叶燕萍   

  1. 浙江华东测绘与工程安全技术有限公司，浙江  杭州，310014
  • 作者简介:叶燕萍（1985— ），女，浙江东阳人，高级工程师，研究方向为地理信息系统、航空摄影与遥感。

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Abstract:

The spatial correlation-based underwater topography modeling method utilizes data such as forward- and backward-looking stereo image pairs from the Gaofen-7 satellite, panchromatic and multi-spectral images from the Gaofen-7 satellite, and SRTM-DEM (Shuttle Radar Topography Mission-Digital Elevation Model) as its basis. Combined with data such as water edge lines and ridgelines, the method establishes underwater topography by leveraging the morphological similarity and topographic continuity between surrounding measurable terrain and unknown underwater terrain. The applicability of this modeling method is assessed by analyzing the relative errors and mean errors between measured underwater elevation points and the calculated underwater topographic elevations. The results show that the modeling method is suitable for the inversion of underwater topography of river channels and can provide valuable reference for large-scale underwater topography modeling.

Key words: underwater topography modeling, Gaofen-7 satellite, spatial correlation, digital elevation model, digital surface model

摘要：

基于空间相关性的水下地形建模方法以高分七号卫星前视/后视立体像对、高分七号卫星全色/多光谱影像、SRTM-DEM（Shuttle Radar Topography Mission-Digital Elevation Model）等为基础数据，结合水涯线、山脊线等数据，利用周边可测地形和水下未知地形的地貌相似性和地形连续性建立。通过对实测水下高程点与水下地形高程计算结果进行相对误差和中误差结果分析，判断此建模方法的适用性。结果表明，此建模方法适用于河道水下地形反演，对大范围的水下地形建模具有一定参考价值。

关键词: 水下地形建模, 高分七号卫星, 空间相关性, 数字高程模型, 数字表面模型

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