SU1543303A1 - Device for determining magnitude of vertical water-exchange through low-permeable layer - Google Patents

Abstract

The invention relates to engineering and geological research. The purpose of the invention is to improve the accuracy of determining the magnitude of the vertical water exchange by directly measuring the amount of water passing through the low permeable layer. The device is a perforated tube with a filter divided into a receiving and separating compartments, in one of which (measuring) there is a floating tank with a float chamber having a lifting force equal to the mass of the tank. The receiving compartment is crushed into a low-permeable layer at the bottom of the well into which the device is placed. Water passing through the low-permeable layer from the receiving compartment through the tube into the floating tank. The change in the level in the floating tank for a specific period of time determines the amount of vertical water exchange. 1 il.

Description

The invention relates to engineering and geological research and is intended to determine the magnitude of the vertical water exchange between aquifers through a low-permeable separation layer.

The purpose of the invention is to improve the accuracy of determining the magnitude of the vertical water exchange by directly measuring the amount of water passing through the low permeable layer.

The drawing shows a diagram of the proposed device. The device includes a low-permeable layer 1, separating the horizon of pressure 2 and ground water 3 (arrows show

flow 4 of water through the low permeable layer), well 5, pipe 6 with perforation holes 7, protected by filter 8, divided by partition 9 into water receiving 10 and measuring 11 compartments, with hole 12, tube 13 and fitting 14 out of it,

a rubber hose 15 connected to a floating tank, divided by a hermetic partition 17 into two chambers: a hermetically sealed float chamber 18 and a chamber 19 connected to the rubber hose 15.

Level 20 of pressurized water is set above groundwater level 21, to measure water layer 22, postSD

4 CO CO

ABOUT

with

who drank into the tank 16, serves as a hole 23.

The determination of the magnitude of the vertical water exchange using the proposed device is carried out as follows.

In the well 5, drilled to the low permeable layer 1, the metal pipe 6 is pushed and the water intake compartment 10 is pressed into the low permeable layer 1. Water through the filter 8 through the perforations 7 enters the pipe 6 and is set at 21 of the ground water. Water intake compartment 10 intercepts part of flow 4, filtering through low-permeable layer 1, and through hole 12 goes to tube 13, from which through nozzle 14 through hose 15 enters the floating tank 16. According to the difference in the measurement of water level in measuring tank 16, the amount water from the low-permeable layer 1 to the receiving compartment 10 for a specific period of time t. The calculation is made according to the formula

V S-h,

where V is the volume of water entering the tank 16 during time t;

cross-sectional area of the floating tank 16; water bed height 22, post

S h

five

0

five

0

five

who drank into the tank 16

during t.

The height of the water layer, N (mm), which entered the receiving compartment 10 from the low permeable layer 1, is determined by the formula

4 v

TJ -TV

11 - w

where D is the internal diameter of the receiver pipe.

Formula of invention

A device for determining the magnitude of vertical water exchange through a low-permeable layer comprising a perforated pipe with a filter located around it, characterized in that, in order to improve the accuracy of determining the magnitude of vertical water exchange by directly measuring the amount of water passing through the low-permeable layer, the perforated pipe is divided into

I

The receiving and measuring compartments have a horizontal partition, in the hole of which a vertical tube is hermetically installed, while in the measuring compartment there is a floating tank with a float chamber with a lifting force equal to the weight of the tank and connected with a flexible connection to the vertical tube of the receiving chamber.

10 9 11

Claims (1)

Claim A device for determining the magnitude of vertical water exchange through a poorly permeable layer, including a perforated pipe with a filter located around it, characterized in that, in order to increase the accuracy of determining the magnitude of vertical water exchange by directly measuring the amount of water passing through a poorly permeable layer, the perforated pipe is divided into I receiving and measuring compartments with a horizontal partition, in the opening of which a vertical tube is hermetically installed, while a floating tank with a float chamber with a lifting force equal to the weight of the tank and connected by a flexible connection to the vertical tube of the receiving chamber is placed in the measuring compartment.