Underwater terrain erosion and deposition evolution analysis method and device for navigation channel

Abstract

The invention discloses an underwater terrain erosion and deposition evolution analysis method for a channel. The method comprises the following steps: acquiring a data map layer of a channel surveying and mapping map; a water depth map layer is screened out according to the data elements of all the data map layers, and point elements of water depth points in the water depth map layer are exported as GIS format data; generating a digital elevation model according to the GIS format data through an interpolation algorithm, wherein the digital elevation model is generated by delimiting an actual water area of the digital elevation model through a maximum marginal value; and carrying out subtraction calculation on the digital elevation models at different times to obtain an erosion and deposition evolution result. According to the method, the erosion and deposition evolution result is obtained through subtraction of different time digital elevation models, and the channel underwater terrain erosion and deposition condition and the erosion and deposition amount can be accurately described.

Description

technical field [0001] The present application relates to a channel underwater terrain analysis technology, in particular to a channel underwater terrain erosion and silting evolution analysis method. The present application also relates to a device for analyzing the erosion and siltation evolution of the underwater topography of the waterway. Background technique [0002] For a certain river section, if the amount of sediment transported from the upstream is greater than the sediment-carrying capacity of the river section, the excess sediment will be deposited, which is siltation. If the amount of sediment transported from the upstream is less than the sediment-carrying capacity of the river section, the sediment in the river section will be washed away, which is called scouring. [0003] For rivers navigable by ships, it can accurately analyze the sedimentation and scour results of the underwater terrain, effectively judge the evolution direction of the waterway, provide ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the underwater terrain analysis of the channel is not comprehensive enough in the prior art, this application provides a method for analyzing the erosion and silting evolution of the underwater terrain of the channel

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