A Method for Establishing Adaptive Channel Section Model

Abstract

A method for establishing a cross-section model adapted to a river course, including generating interpolation points, performing linear interpolation according to node coordinates, and using interpolation points to approximate the replacement of curves; section line selection, evenly taking points X1 to XN on the left water edge line, and taking points X1 to XN evenly on the left water edge line, and Take points Y1 to YN evenly on the sideline, make a vertical line from X2 to the center line and intersect the right water side line as the X2 reference section line, make a perpendicular line from Y2 to the center line and intersect the left water side line to be the Y2 reference section line, and from X2 to the reference section line , Y2 reference cross-section lines, the one whose two ends do not exceed the channel section is selected as the first survey cross-section line; the cross-section line is optimized, the distance LN between adjacent survey cross-section lines is measured, and if LN is less than the set value, it is a dense area. Expand both ends of the dense area into the optimal area. The invention independently generates each section line according to the given waterside and the center line of the river channel, so that the section line can not only adapt to the waterside, but also ensure that the section lines are evenly distributed in the river channel.

Description

technical field [0001] The invention relates to a method for establishing a section model, in particular to a method for establishing a section model adapted to a river course. Background technique [0002] Channel section line is the necessary data for water channel topographic survey. The current section layout algorithms mainly include interpolation method, center line method, and parallel line method. For straight rivers, these algorithms have little difference and can achieve better section layout effects, but for curved rivers, the effect is less Unsatisfactory. The interpolation method requires a lot of manual intervention to achieve better results, the centerline algorithm cannot strictly control the distance between the edges of the section, and the parallel line algorithm is not applicable at all. [0003] The layout of channel section lines has always been a basic subject of channel research. At present, the topographic survey of waterways basically adopts the ...

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Problems solved by technology

It works well in straight rivers, but not in continuous curved rivers

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