River historic morphology digital recovery method

Abstract

The invention provides a river historic morphology digital recovery method. The method comprises the steps of on the basis of selecting a river section in which the development of an alluvial stream and terraces is complete, selecting a representative cross section of a river section which is planned to be recovered, conducting sediment cylindrical sample drilling, conducting layering according to sediment physical characteristics, recording three-dimensional space coordinates of each layer, then performing age determination on each settled layer, finally conducting line connecting on the three-dimensional space coordinates of the settled layers with an identical age in different sediment columns on the same cross section in general drawing software, wherein obtained cross section morphology is river historic morphology under the age, and conducting line connecting on the coordinates of all ages in sequence, that is, morphology recovery of the whole cross section in all history ages is completed, and the historic morphology recovery of the whole river section is completed after multiple cross sections are recovered. According to the river historic morphology digital recovery method, a geology age measuring technology and a river dynamics cross section molding principle are cross, and the method can be applied to most alluvial river historic morphology recovery, and has important practical value for study of a river landform evolutionary process.

Description

technical field [0001] The invention relates to the field of river geomorphology, in particular to a digital restoration method for river historical forms. Background technique [0002] The historical evolution of rivers is a key issue in understanding the dynamic process of river geomorphology, and it is also the basis for mastering the law of large-scale evolution of rivers. Different from the analysis of the recent evolution of rivers, there are relatively sufficient measured data, and the historical evolution of rivers usually lacks reliable information and data. According to the "Code for Investigation and Investigation of River Channel Evolution (SL383-2007)", for a long time, the historical evolution data of rivers have been obtained mainly from river historical textual research, regional structural background investigation, paleochannel investigation and crevasse alluvial fan investigation. Textual research relies on historical documents; regional tectonic backgroun...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a digital restoration method for the historical form of rivers. On the basis of the principle of cross-section modeling and the layering of sediment ages, the OSL dating technology is introduced into the acquisition of river historical evolution data to solve the problem of vertical sedimentation. The problem of avoiding light layering and digital restoration of cross-section shape during the acquisition process

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