A Method for Determination of River Sediment Transport Ratio Under the Effect of Dam and Reservoir Water Conservancy Projects

A technology for sediment transport and water conservancy engineering, which is applied in fluid dynamics tests, machine/structural component tests, soil material tests, etc. It can solve the problem that the sediment transport ratio cannot be quantified, and achieves the convenience of parameter acquisition and solution Unquantifiable, physically defined effects
CN109632254BActive Publication Date: 2021-04-06XIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
XIAN UNIV OF TECH
Publication Date
2021-04-06

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Abstract

The invention discloses a method for determining the sediment transport ratio of a river under the influence of a dam-reservoir water conservancy project, specifically: first investigating the structure of a check dam in the watershed, respectively fitting the dam height-storage capacity curves of backbone dams and reservoirs in the watershed, Get the total amount of siltation in the backbone dam and reservoir, so as to obtain the annual sediment retention of the backbone dam and reservoir; calculate the structure coefficient f of the check dam in each year according to the structure of the check dam s(i) , so as to obtain the total sediment retention BS of the backbone dam i ; Then according to the balance equation of soil erosion and sediment yield in the watershed, the sediment transport ratio is calculated. The method of the invention has clear physical meaning and convenient parameter acquisition, and solves the problem that the sediment transport ratio in the watershed cannot be quantified due to the influence of check dams and reservoir projects.
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Description

technical field

[0001] The invention belongs to the technical field of water and soil loss control methods, and relates to a method for determining river sediment transfer ratios under the influence of dam reservoir water conservancy projects. Background technique

[0002] The sediment transport ratio refers to the ratio of the total amount of sediment transported through a certain section of a channel or river to the soil erosion volume above the section within a certain period of time. The sediment transport ratio reflects the sediment transport conditions in the watershed. The sediment transport ratio is related to the erosion and sediment accumulation of the watershed. Sedimentation has a major impact. The Loess Plateau is the main part of the Yellow River Basin, and the soil erosion is serious, making the Yellow River the river with the largest sediment load in my country.

[0003] In order to curb serious soil erosion, the Chinese government has adopted a series of s...

Claims

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