A method and system for determining river bottom reference elevation based on large-section survey data

Abstract

The invention discloses a method of determining a datum elevation of a river bottom based on large-section measurement data and a system thereof. The method comprises the following steps that a uniform large-section data model is established by combining a database; a large-section data measurement result standard format and a data structure specification are formulated; whether a large-section data measurement result meets a requirement and a specification is verified; and the river bottom datum elevation is calculated according to the large-section data meeting the requirement; and the riverbottom average elevation, a river bottom width, a river bottom area, a river bottom average elevation change rate and a river bottom area change rate are calculated on the basis of the river bottom datum elevation datum elevation. According to the method, the river bottom datum elevation is automatically calculated and identified based on the inflection point recognition algorithm by utilizing the large-section measurement data of a river channel, so that the inconsistency and randomness brought by manual operation are reduced; the average elevation of the river bottom is, and the accuracy ofcalculating the characteristic values such as the river bottom average elevation, the average river bottom width and the like are guaranteed, and the influence of a river bottom flushing change is faded caused by a non-river bottom characteristic value obtained by participating in calculating a non-river bottom part riverbed elevation section is eliminated.

Description

technical field [0001] The invention relates to the technical field of sediment data processing, in particular to a method and system for determining a river bottom reference elevation based on large-section measurement data. Background technique [0002] The determination of the river bottom reference elevation of a section is of great significance for analyzing the erosion and deposition changes of a reservoir section over time. The average river bottom elevation of each section can be directly calculated according to the large-section measurement data and the river bottom reference elevation of the section. It has two meanings: on the one hand, the time change of the average river bottom elevation directly reflects the erosion and deposition changes of the section; Above this elevation, the change of sediment erosion and silting in the reservoir area is not obvious, and the shape of the cross-section is basically stable, but below this elevation, affected by the movement ...

AI Technical Summary

Problems solved by technology

[0022] In order to solve the deficiencies in the prior art, the present invention provides a method and system for determining the river bottom reference elevation based on large-section measurement data, which solves the problem of uncertainty caused by relying on manual experience to confirm the river bottom reference elevation

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