SU1422069A1 - Apparatus for sampling ground water - Google Patents

Abstract

The invention relates to the technique of monitoring the state of groundwater and can be used in hydrogeology, land reclamation, soil science and environmental protection from / 7 / /// /// 7 // // / gr. The purpose of the invention is to simplify the design and expand the scope. The device contains a pipe 1 vertically installed in the ground with a closed lower end located with an annular gap in the vessel 2 open from above. The annular gap between the pipe 1 and the vessel 2 is filled with filter material 3. At the upper end of pipe 1 a cap 4 is installed. In the vertical pipe 1, the height of the vessel 2 must be greater than the height of the water head formed by the forces of the capillary pressure of the soil. The device allows water to be taken from the zone of incomplete water saturation of soils and soils. 1 il. and Y / // 7/7 777, 77 4 b oe

Description

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The invention relates to the technique of csntrol of the state of groundwater and can be used in hydrogeology, melioration, soil science, and in the protection of the environment from pollution.

The aim of the invention is to simplify the design and expand the scope.

 jThe drawing shows the proposed device, a longitudinal section.

 The device includes a vertical pipe 1 installed with an annular intake in an open vessel 2 from above. The lower end of pipe 1 is closed, made perforated and rests on the bottom of vessel 2. Filter material 3 is located in the annular gap between pipe 1 and side walls of the vessel 2. apply sand fraction exceeding the diameter of the perforated holes of the pipe 1. At the upper end of the pipe 1 there is a cap 4. The filter material 3 is saturated with water.

The device works as follows.

After installing the device in the soil in the pre-water-saturated filter material 3 in the lower perforated part of the vertical pipe 1 placed in the vessel 2, there is a drop in water levels H – H, where H is the water level in the filter mat 3, on the surface of which there is a capillary pn is the ground pressure ;.Н -: water level in a vertical pipe., 1 ,,. on the surface of which atmospheric pressure acts. When water is sampled from a vertical pipe 1, its level in the filter material 3 drops, as a result, an additional negative pressure is formed above it, under the influence of which a new portion of water enters the device. To form a water layer in the vertical pipe 1, the height of the vessel 2 must be chosen more than the high water pressure (H – H) generated by the capillary pressure of the soil, protecting the vertical pipe 1 from being exposed to moisture, its upper part is equipped with a cap four.

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The device allows for the removal of water from the zone of incomplete watering;

Claims (1)

Shadow Formula A soil water sampling device, including a pipe vertically installed in the ground with a closed lower end, a filter with filter material at the lower end and a cap at the upper end, which is designed to simplify the design and expand the scope. closed bottom vessel installed with an annular gap 35 at the lower end of the pipe, and the annular gap is filled with filter material, the lower end of the pipe is made perforated. The device allows for the removal of water from the zone of incomplete watering; Shadow Formula