The method for determining the potential erosion resistance to melt the soil taking into account infiltration

 

(57) Abstract:

The invention relates to agriculture, in particular to the study of erosion processes occurring on the surface of the soil from runoff, snowmelt, rain and irrigation water. Simulated erosion process in hydrolock the flow of water. Take into account the energy consumption for destruction of a unit mass of the sample by measuring the height of the water flow before and after interaction with a sample of soil and flow of the suspension and the amount of water that leaked through the sample. Erosion resistance of the soil is determined from the above description of the expression. 2 Il.

The invention relates to agriculture, in particular to methods for the study of erosion processes occurring on the surface of the soil from runoff, snowmelt, rain and irrigation water, and can be used in soil science, land reclamation and hydrology.

Known methods for determining the erosion resistance of soils, consisting in the determination of scour velocity stream of water sample of soil is placed in the camera hydrolock and located in it its the surface above the bottom of the tray 1-2 mm.

The main deficiencies the current of water with a projecting part of the sample of soil above the bottom of the tray; the bias and the complexity of determining the beginning of the movement of the destroyed particles of soil water flow; determined to lose water flow rate has the dimension of m/s and does not reflect the physical nature and magnitude of potential erosion resistance of soils.

The purpose of the invention is to improve the accuracy of modeling the erosion process with regard to infiltration.

For this purpose, in a known way to determine the potential erosion resistance of soils, including the modeling of the erosion process in hydrolock the flow of water, the energy consumption for destruction of a unit mass of the sample by measuring the height of the water flow before and after interaction with the sample and the flow rate of the suspension according to the invention to measure the amount of water percolating through the sample, and the potential erosion resistance of the soil is determined from the expression

= - + -

In Fig. 1 shows a diagram of the method of Fig. 2 - section a-a in Fig. 1.

In the diagram, the method indicated an inclined chute 1, removable camera 2 for a sample of soil that is installed in the working side of the tray 1, the perforated partition 3 for the Department of water percolating through the sample, the micro is x walls, system 6 power supply constant pressure, the damper 7 and the clamp Hoffmann 8.

The method is implemented as follows. Before the beginning of experiments instead of the removable camera 2 in tray 1 is set precision engineered cover (not shown), which is along the line of junction with the bottom from the bottom side hydroisolyatsia. Then use system 6 constant head is set to the specified water flow rate Qin. Opens the clip Hoffman 8 and using 4 micrometer with gauge needle 5 measured the height of the water flow in the head hB1and the output hB2the parts of the tray. The results obtained are recorded in the log of observations. Is determined by the bulk sample of soilp. Then replace the cover to the tray 1 is mounted camera 2 with a test specimen of soil. Junctions also waterproofed. Opens the clip Hoffman 8 and at equal intervals of time by means of 4 micrometers with measuring needle 5 is determined and recorded in the log of the observations of the height of the flow of water (h1in the head (as a result of research it was found that hB1= = h1so h1not measured) and the height of the flow of suspensions of h2the output of the tray 1. At the same time samples are collected suspensus in the formula

= - + -

where Qin, Qc, QVI- consumption of water, the suspension and the amount of water percolating through the sample, m3;

In - the width of the tray, m;

in,p, 'inrespectively the volumetric weight of water, soil and infiltrirovanii water, kg/m3;

hB2h2- the height of the flow of water and the suspension on the output side of the tray defined respectively before experience without sample and in the process experience a sample of soil, m

An example implementation of the method is given in the table.

Feasibility advantage of the proposed method is to improve the accuracy of modeling the erosion process methods of thermodynamics. This eliminates the need for a detailed study of a very complex, multifactorial mechanisms of fracture water flow specific soils in all their diversity, uncertainty and variability in space and in time. The method allows to create a single, objective, integral criterion for assessing erosion resistance of soils.

The method can be used in research and industrial organizations involved in the design of erosion control measures is MINUTE TO MELT the SOIL taking into ACCOUNT INFILTRATION, which consists in modeling the erosion process in hydrolock the flow of water, the energy consumption for destruction of a unit mass of the sample by measuring the height of the water flow before and after interaction with the sample and the flow rate of the suspension, wherein the first measured quantity of water, proschivaem through the sample, and then determine the potential erosion resistance of soils from

< / BR>
where Qin, Qwith, Qinn- consumption of water, the suspension and the amount of water proschivaem through the sample, m3;

b - width of the tray, m;

in,p,1inrespectively the volumetric weight of water, soil and infiltrating water, kg/m3;

- the height of the flow of water and the suspension on the output side of the tray defined respectively before experience without sample and in the process experience a sample of soil, m

 

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