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Analysis method, device, medium and equipment for original river channel gradient of ancient river deposition

An analysis method and technology of river channels, applied in particle and sedimentation analysis, measuring device, particle size analysis, etc., can solve problems such as inability to directly measure

Active Publication Date: 2021-08-10
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

However, the ancient strata usually experienced complex tectonic movements, and the 'primitive channel gradient' cannot be directly measured; and there is no similar calculation method for the 'primitive channel gradient' of ancient rivers, so it is urgent to propose a method to calculate the 'prime channel gradient' of ancient rivers. A New Method of River Slope

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  • Analysis method, device, medium and equipment for original river channel gradient of ancient river deposition
  • Analysis method, device, medium and equipment for original river channel gradient of ancient river deposition
  • Analysis method, device, medium and equipment for original river channel gradient of ancient river deposition

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Embodiment Construction

[0044] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention are clearly and completely described below. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without making creative efforts belong to the protection scope of the present invention.

[0045] "Original channel gradient" in the present invention refers to the average slope gradient of the channel when the ancient channel was formed and deposited; that is, during the deposition period, the ratio of the elevation drop of the centerline of the riverbed at both ends of the channel section to the distance of the channel section was measured. For ancient fluvial deposits, such as common fluvial facies outcrops, the sediment grain size, sediment density, and channe...

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Abstract

The invention relates to an original river channel gradient analysis method, device, medium and equipment for ancient river deposition. The method comprises the following steps of a, selecting a completely stored river channel, and measuring the sediment density, the sediment particle size median, the river water density and the river channel full bank depth on a riverbed; b, calculating effective relative density of the sediment based on the sediment density and the river water density; c, calculating the particle Reynolds number of the sediments under the full-bank water depth condition based on the effective relative density of the sediments and the particle size median of the sediments; d, calculating the critical starting stress of the sediment on the basis of the particle Reynolds number of the sediment under the full-bank water depth condition; e, calculating a riverbed critical water flow velocity based on the critical starting stress of the sediment; f, based on the riverbed critical water flow velocity and the riverway full bank depth in the step a, calculating the average water flow velocity of the cross section of the riverway; and g, on the basis of the average water flow speed of the cross section of the river channel in the step f and the river channel full bank depth in the step a, calculating an original river channel gradient.

Description

technical field [0001] The invention relates to an analysis method, device, medium and equipment for calculating the 'primitive river gradient' of ancient river deposits, and belongs to the technical field of ancient river geological structure and geomorphology. Background technique [0002] Fluvial sediments are the most important type of continental sediments, widely distributed in various parts of sedimentary basins, and are the most important component of continental sedimentary strata. The sedimentological and morphological characteristics of ancient rivers can be used as important indicator parameters of paleogeography, which is crucial for restoring paleoenvironment and paleogeomorphology. Among them, the 'primitive channel gradient' can effectively reflect the characteristics of paleostructure (such as terrain slope) and paleogeomorphology (such as river type), which is of great significance for the study of paleoenvironment and paleogeography. However, the ancient ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V9/00G01N15/02G01N9/00G01B21/08G01D21/02
CPCG01V9/00G01N15/02G01N9/00G01B21/08G01D21/02
Inventor 李伟岳大力王武荣
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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