Rainfall infiltration soil column simulation system and unsatured hydraulic conductivity determination method

A simulation system and soil column technology, applied in the field of unsaturated soil, can solve the problems of difficult installation of soil columns, strong artificiality, large length of single section of soil-loading components, etc.

Inactive Publication Date: 2016-12-07
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No matter what kind of soil column is used for the test, there are still the following problems: ① The length of the single section of the soil-loading component in the soil column experiment is large, and the convenience is poor, so that the installation of the soil column is difficult, which causes inconvenience to the cleaning of the instrument; ② The installation of monitoring equipment is cumbers

Method used

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  • Rainfall infiltration soil column simulation system and unsatured hydraulic conductivity determination method
  • Rainfall infiltration soil column simulation system and unsatured hydraulic conductivity determination method
  • Rainfall infiltration soil column simulation system and unsatured hydraulic conductivity determination method

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0121] Example one

[0122] In this embodiment, the multiple intensity rainfall simulation device used in conjunction with the present invention is a low intensity rainfall total infiltration simulation device (16);

[0123] 1, the low-intensity rainfall total infiltration simulation device (16) includes a water delivery bucket (16-1) with a scale engraved on the outside, and a water delivery pipe (16-12) passes through the bottom of the water delivery bucket (16-1) ) Is connected to the rainfall sprinkler (16-9), the rainfall sprinkler (16-9) is set on the top of the cylindrical member (10) on the upper part of the soil column test standard member (4), and the cylindrical member (10) is higher than the original soil sample (12) ) 2-5 cm of the upper surface is provided with an anti-hydraulic impact plate (A), and the anti-hydraulic impact plate (A) is provided with sieve holes; the U-shaped head control pipe (10-2) is provided with a light The lightweight plastic sheet (16-8) is ...

Example Embodiment

[0172] Example two

[0173] The multi-intensity rainfall simulation device used in conjunction with the present invention in this embodiment is a medium-intensity rainfall and runoff infiltration simulation device (17);

[0174] Referring to Figure 2, the medium-intensity rainfall radial inflow simulation device (17) includes a rainfall container (17-9) arranged in a cylindrical member (10) and a circular rainfall container (17-9) arranged at the bottom The rain hole (17-10), the cylindrical member (10) is higher than the original soil sample (12) 2-5 cm on the upper surface of the water pressure impact plate (A), and the water pressure impact plate (A) is installed There are sieve holes; the top of the rainfall container (17-9) is provided with a pressure control pipe (17-8) in the rainfall container and a water inlet pipe (17-7) connected to an external water source; the water inlet pipe (17-7) ) Is provided with an inlet solenoid valve (17-2), a water inlet pump (17-1) and a fi...

Example Embodiment

[0195] Example three

[0196] The multi-intensity rainfall simulation device used in conjunction with the present invention in this embodiment is a high-intensity rainfall stable infiltration simulation device (14);

[0197] Referring to Figure 3, the high-intensity stable rainfall infiltration simulation device (14) includes a water delivery bucket (14-1) with a scale on the outside, and a water delivery pipe (14-12) passes under the water delivery bucket (14-1). ) Is connected to the rainfall sprinkler (14-9), the rainfall sprinkler (14-9) is set on the top of the cylindrical member (10) on the upper part of the soil column test standard member (4), and the cylindrical member (10) is higher than the original soil sample (12) ) 2-5 cm of the upper surface is provided with an anti-hydraulic impact plate (A), and the anti-hydraulic impact plate (A) is provided with sieve holes; the U-shaped head control pipe (10-2) is provided with a light The lightweight plastic sheet (14-8) is in...

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Abstract

The invention provides a rainfall infiltration soil column simulation system and an unsatured hydraulic conductivity determination method. The simulation system comprises a bottom structural element, one or several soil column experiment standardized structural elements which are connected to the bottom element and are connected in series connection, and an apparatus for simulating rainfalls of a plurality of forms at the top of the soil column experiment standardized structural elements; soil containing structural elements of the simulation system comprise a plurality of standard structural elements and are automatically controlled by a computer, and determination of rainfall infiltration coefficient and unsatured hydraulic conductivity can be realized based on the system; determination steps and computing methods are provided, undistributed soil column of large diameter is used for laboratory experiment during determination, devices for simulating rainfall of a plurality forms are used for simulating four kinds of hydraulic power boundary conditions, which comprise a low intensity rainfall full infiltration boundary condition, a middle intensity rainfall infiltration with runoff boundary condition, a high intensity rainfall stable infiltration boundary condition, and a snow melt infiltration boundary condition. The system and the method have the characteristics of good practicality, good usage effects, as well as promotion and usage convenience.

Description

technical field [0001] The invention belongs to the technical field of unsaturated soil, in particular to a precipitation infiltration soil column simulation system and a method for measuring unsaturated permeability coefficient. Background technique [0002] Precipitation mainly refers to rainfall and snowfall. Moisture reaches the ground from the atmosphere in various forms. Other forms of precipitation include dew, frost, hail, etc. Precipitation is an important part of the hydrological cycle and the basic source of water for human beings. Precipitation data is the basis for analyzing reasonable flood and drought conditions and basin drought conditions, and is also the basis for the planning, design, management and application of water resources development and utilization, such as flood control, power generation, irrigation, etc. The process of precipitation infiltration to recharge groundwater is one of the most basic links in the "three waters" mutual conversion relat...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N5/04
CPCG01N5/045G01N15/08
Inventor 毛正君
Owner XIAN UNIV OF SCI & TECH
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