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Sediment dynamic particle size calculation method considering different sediment sources for distributed water-sediment model

A computing method and distributed technology, applied in computing, computer-aided design, design optimization/simulation, etc., to achieve the effect of improving the ability to describe, improve the accuracy of simulation, and improve the accuracy of simulation

Active Publication Date: 2021-03-30
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a distributed water-sediment model considering the sediment dynamic particle size calculation method of different sediment sources, thereby solving the aforementioned problems existing in the prior art

Method used

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  • Sediment dynamic particle size calculation method considering different sediment sources for distributed water-sediment model
  • Sediment dynamic particle size calculation method considering different sediment sources for distributed water-sediment model
  • Sediment dynamic particle size calculation method considering different sediment sources for distributed water-sediment model

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Embodiment 1

[0039] like figure 1 As shown, in this embodiment, a distributed water-sediment model is provided to consider the sediment dynamic particle size calculation method of different sediment sources, including the following steps,

[0040] S1. Based on the distributed water-sediment model WEP-SED with the three-level confluence structure of slope, channel and river, the initial sediment particle size is used to calculate the sediment yield and transport of the slope, channel and river links of the target watershed respectively ;

[0041] S2. Combining with the calculation results of the channel link sediment yield calculated in S1, according to the sediment yield and sediment particle size on the slope entering the channel link and the erosion sediment yield and sediment particle size of the channel link , calculate the number of sediment particles from the slope of the channel link and the sediment produced by the channel link, and use this as the weight, combined with the corres...

Embodiment 2

[0065] like Figure 2 to Figure 6 As shown, in the present embodiment, the control area ( figure 2 ) from 1956 to 2018 as an example, using the distributed water-sediment model WEP-SED model with a three-level confluence structure ( image 3 ), detail the specific implementation steps of the sediment dynamic particle size calculation method provided by the present invention. Specifically, it includes five steps, which are as follows:

[0066] 1. Calculation of sand production and transportation,

[0067] Based on the distributed water-sediment model WEP-SED with the three-level confluence structure of slope, channel and channel, the initial sediment particle size is used to analyze the slope, channel Calculation of sediment production and transport in links and river links. (This process is to use the distributed water-sediment model WEP-SED to calculate the sediment production and transportation of each link in the target watershed, including slopes, ditches, and rivers....

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Abstract

The invention discloses a sediment dynamic particle size calculation method considering different sediment sources for a distributed water-sediment model, and the method comprises the steps: in the distributed water-sediment model with a slope, a channel and a riverway, according to the different sediment sources in a sediment production and transportation process, performing weighted average calculation of the comprehensive particle size of the sediment through the number of the sediment particles from each source, and finally obtaining the sediment production and transportation capacity of the slope, the channel and the riverway link of the target drainage basin under the simulation of the distributed water-sediment model. The method has the advantages that dynamic change calculation ofthe sediment particle size is achieved by considering the sediment source, the method is suitable for basin distributed water and sediment models of various scales, the sediment particle size of the model can achieve dynamic change on different space-time scales, then the depicting capacity of the model on reality is improved, and the simulation precision of the distributed water and sediment model is effectively improved.

Description

technical field [0001] The invention relates to the technical field of distributed water-sediment model simulation calculations, in particular to a method for calculating the dynamic particle size of sediment in consideration of different sediment sources in a distributed water-sediment model. Background technique [0002] In recent years, with the continuous improvement of measurement methods for the underlying surface and meteorological elements, various water-sediment models have continued to develop and innovate. In the sand particle movement model, when simulating and calculating sediment production and transportation, it is often based on some formulas with physical mechanisms to calculate the sinking velocity and sand-carrying force, etc., so as to simulate the sediment transportation process in detail. In the water-sediment model, the sediment particle size is a key parameter that directly affects the simulation calculation process of the model. However, when domest...

Claims

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Application Information

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IPC IPC(8): G06F30/28G06F113/08G06F119/14
CPCG06F30/28G06F2113/08G06F2119/14
Inventor 周祖昊徐东坡刘佳嘉蔡静雅严子奇王浩贾仰文
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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