Water body environment terrain construction method based on scatter data

Abstract

The invention provides a water body environment terrain construction method based on scatter data. The water environment terrain construction method comprises the following steps: (1) obtaining terrain scatter data of a target area through field investigation and drawing a CAD graph; (2) extracting transverse distance, longitudinal distance and elevation data of actual measurement points on the cross section of each river channel; (3) carrying out interpolation on each river section by adopting a cubic spline interpolation function; (4) performing linear interpolation on the whole target area through the triangular mesh to obtain a planar topographic map of the target area; (5) converting the planar topographic map of the target area into a riverbed curved surface of the target area; and (6) calculating the thickness of a riverbed movable layer of the target area under the existing hydraulic condition, and vertically stretching the curved surface of the riverbed on the basis of the thickness of the riverbed movable layer so as to complete the construction of the water environment terrain of the target area based on the scatter data. According to the method, the accuracy of the constructed water body environment terrain can be improved, and technical support can be provided for establishing a river flood and sediment transportation and pollutant diffusion model.

Description

technical field [0001] The invention belongs to the field of water body environment topography construction, and relates to a water body environment topography construction method based on scattered point data. Background technique [0002] In recent years, the development and utilization of water resources has become the focus of economic development. In order to better develop water resources, it is necessary to have a comprehensive and clear understanding of the water environment topography. Water environmental topography is an important part of watershed management and development, flood control and drought relief system, and water resource development and utilization. At the same time, water environmental topography is closely related to flood movement trends, sediment transport laws, and water pollutant distribution. [0003] The water body environment is affected by various factors such as river erosion, sediment deposition, and geological structure to form a complex ...

AI Technical Summary

Problems solved by technology

[0004] Water environmental topography is a key part of understanding reservoirs, rivers, watersheds, and oceans. However, due to the complex and changeable water environmental topography and the limitation of the natural environment, the measured data is insufficient, and it is difficult to reflect the complete underwater topography. Movement trends, sediment transport laws, and water pollutant distribution have brought great difficulties

Although the terrain generation method in areas without data can obtain large-scale terrain data, it is difficult to obtain accurate terrain data due to the limitation of resolution, which has greatly affected the numerical simulation process; while the terrain in areas with data Generation methods, such as based on the shape of the channel section, often divide the channel section into U-shaped, V-shaped and flat-shaped structures only through the channel boundary line and deep-flow line, which is difficult to reflect the real topography and diversity of the channel section

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