River historic morphology digital recovery method

A historical and river technology, applied in the field of river geomorphology, which can solve the problems of restoration, light-proof layered section shape number, etc.

Active Publication Date: 2017-06-13
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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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 technolog

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Embodiment Construction

[0017] The present invention divides the river into a plurality of sections according to the principle of modeling of river sections (see "River Engineering Model Test Regulations (SL99-2012)", and sets 7-15 vertical lines on each section to carry out vertical sampling of sediments. The age of each sediment sample judges the historical form of river.Except that the river section model-making principle, the theory that the present invention also relates to has:

[0018] (1) Delamination of alluvial river sediments. Alluvial rivers often deposit part of the sediment in the riverbed during the continuous transport of upstream sediment, and different hydraulic conditions in different ages will bring sediments with different physical properties. Each sedimentary layer is a chronological record of a particular hydrological event;

[0019] (2) Optical Luminescence Dating Technology: Optical Luminescence Dating Technology is a dating method based on the cumulative effect of natural ra...

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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...

Claims

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Application Information

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IPC IPC(8): G06T17/05
CPCG06T17/05Y02A20/402
Inventor 周银军卢金友范北林徐平闫霞李志晶金中武王军代娟陈义武刘小斌张玉琴吴华莉程传国甘军
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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