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System and method for measuring flow velocity and flow in slope soil

A flow measurement and measurement system technology, which is applied in measurement devices, soil material testing, instruments, etc., can solve the problems of inability to realize and difficult to monitor the flow velocity in the soil, and achieve the effect of being easy to carry.

Inactive Publication Date: 2016-10-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a system and method for measuring the flow velocity and flow rate in the slope soil; A complete combined monitoring system and method for flow velocity and flow rate in slope soil

Method used

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  • System and method for measuring flow velocity and flow in slope soil
  • System and method for measuring flow velocity and flow in slope soil
  • System and method for measuring flow velocity and flow in slope soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Build slope runoff plots on the slope along the trend of the slope from top to bottom. The standard runoff slope is 15 degrees, and the slope range designed for general tests is 10-24 degrees.

[0052] Set sealing baffles on the left and right boundaries of the slope runoff plot and the upper boundary of the high terrain respectively. The depth of the sealing baffles inserted into the slope is generally 200mm-300mm; the height of the sealing baffles above the ground is generally 100mm- 200mm; the sealing baffle is a steel plate or cement board; relying on the above three sealing baffles (that is, the sealing baffles set on the left and right boundaries of the slope runoff plot and the upper boundary of the high terrain) to make the runoff of the plot and the two sides and the upper slope runoff isolation.

[0053] The soil inflow collection facility 2 is arranged at the lower boundary of the low terrain of the slope runoff plot, thereby forming a slope runoff plot compo...

Embodiment approach 1

[0063] Implementation Mode 1: Measurement of soil flow velocity and dynamic calculation of soil flow in the case of natural rainfall

[0064] first step. According to the test requirements, as mentioned above, firstly, a slope runoff zone with a specific slope and independent water system is built on the slope to ensure that the soil layer on the slope does not interfere; The width of the plot is consistent and the depth reaches the vertical section of the parent material layer, and the soil flow collection facility 2 is installed in the excavated section. Soil middle flow collection device 2 adopts layered design, each layer is designed according to 150mm, generally designed with 4-5 layers, the number of layers can be adjusted according to the depth of the excavated section; Agent delivery facility 1. According to the requirements of the test design, the tracer injection facilities should be placed on the slope at a certain depth, generally 50mm-100mm (see figure 1 ).

...

Embodiment approach 2

[0073] Implementation Mode 2: Measurement of soil flow velocity and calculation of soil flow dynamics under artificially simulated rainfall conditions

[0074] Because the intensity of natural rainfall is easy to fluctuate and difficult to control, the duration of rainfall will also change, sometimes for a long time, sometimes for a short time. Therefore, for decades, the study of the hydrodynamic process of slope runoff in this research field has generally been carried out by artificially simulating rainfall.

[0075] first step. Ditto.

[0076] second step. After the construction and installation of the slope runoff plot and the related tracer delivery facility 1 and soil midflow collection facility 2, firstly, 4 (2 on each side) pressure-controlled, two-way Side spray, portable simulated rainfall device (conventional use). According to the test design, the rain intensity is controlled through the pressure and nozzle aperture size, and a certain duration of rainfall is s...

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Abstract

The invention discloses a system for measuring flow speed and flow of slope surface interflow. The system for measuring the flow speed and flow of slope surface interflow comprises a tracer agent feed facility arranged at the upper end of a slope surface runoff plot and an interflow collecting facility arranged at the lower end of the slope surface runoff plot. The invention further discloses the method for measuring the flow speed and flow of slope surface interflow through the system for measuring the flow speed and flow of slope surface interflow. The method comprises the steps that the tracer agent feed facility is arranged on the inner side of the boundary at the upper end of the slope surface runoff plot, a section with the width consistent with that of the plot and the depth reaching a parent material layer is dug in the lower end of the slope surface runoff plot, then the interflow collecting facility is mounted in the dug section, and the interflow of the whole runoff plot is collected and measured; the flow speed of the interflow is calculated according to the time from feeding of a tracer agent to first appearing in the collecting facility; the flow speed of slope interflow and the dynamic law of the slope surface interflow are revealed.

Description

technical field [0001] The invention belongs to the technical fields of soil hydrodynamics, slope hydrology, water and soil conservation and agricultural non-point source pollution prevention and control, and relates to a system and method for measuring the flow velocity and flow rate in slope soil, which can be used for natural and artificial slope soil flow velocity and carrying Experimental monitoring of nutrient transport dynamics. Background technique [0002] Soil interflow is an important part of slope runoff, which mainly occurs on the discontinuous interface of soil at different levels, and is a water flow movement in porous media. In some watersheds in southern China, the mid-soil flow accounts for a large proportion of the runoff, and sometimes the mid-soil flow accounts for more than 85% of the total runoff. Such as the small watershed of Gaowuxi in Jiangwan, Zhejiang Province. Soil midflow has an important impact on watershed runoff generation and nutrient los...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24G01D21/02
Inventor 张丽萍张锐波陈儒章
Owner ZHEJIANG UNIV
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