River silt transport ratio determination method under influence of dam and reservoir water conservancy projects
A technology for sediment transport and water conservancy engineering. It is used in fluid dynamics tests, testing of machine/structural components, and measuring devices. It can solve problems such as the inability to quantify sediment transport ratios, and achieve convenient parameter acquisition and physical significance. Identify and address unquantifiable effects
Active Publication Date: 2019-04-16
XIAN UNIV OF TECH
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[0005] The purpose of the present invention is to provide a method for determining the river sediment transport ratio under the influence of dam and reservoir water conservancy projects, which solves the problem that the river basin sediment transport ratio cannot be quantified due to the influence of check dams and reservoir projects
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[0051] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0052] The invention provides a method for determining the sediment transport ratio of a river under the influence of a dam reservoir water conservancy project, which is specifically implemented according to the following steps:
[0053] Step 1, analyze the basin check dam structure:
[0054] Determine the number (n) and control area (A) of backbone dams, medium dams and small dams in the watershed respectively.
[0055] Step 2, Investigate the total siltation of backbone dams and reservoirs:
[0056] 2.1. According to the investigation results of step 1, draw the dam height (H)-storage capacity (V) curves of the backbone dam and the reservoir respectively, and fit the dam height-storage capacity curves of the backbone dam and the reservoir. After fitting the dam height-storage capacity curves of more than 340 backbone dams and reservoirs in ...
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The invention discloses a river silt transport ratio determination method under influence of dam and reservoir water conservancy projects. The method specifically comprises the following steps that firstly, a warp land dam structure in a drainage basin is surveyed, dam height-reservoir capacity curves of a backbone dam and a reservoir in the drainage basin are fitted, so that the total silting amount of the backbone dam and the reservoir is obtained, and the year-by-year sand blocking amount of the backbone dam and the reservoir is obtained; a warp land dam structure coefficient fs(i) of eachyear is calculated according to the warp land dam structure so as to obtain the total sediment retaining amount BSi of the backbone dam; and then the silt transport ratio is calculated according to asoil erosion sand production quantity balance equation of the drainage basin. According to the method, the physical significance is clear, parameter acquisition is convenient, and the problem that thesilt transport ratio of the drainage basin cannot be quantified due to the influence of the warp land dam and the reservoir projects is solved.
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...
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Login to View More IPC IPC(8): G01M10/00G01N33/24
CPCG01M10/00G01N33/24
Inventor 高海东吴曌杨媛媛王飞超李占斌李鹏王杰李斌斌
Owner XIAN UNIV OF TECH