Measurement device for permeability coefficient parameters of low-permeability water-bearing layer and method adopting measurement device

Abstract

The invention discloses a measurement device for permeability coefficient parameters of a low-permeability water-bearing layer and a method adopting the measurement device. The measurement device comprises a siphon, a water level measurement element and a water flow measurement element, wherein a water inlet end of the siphon extends into to-be-measured steady water level, elevation of a water outlet end of the siphon is smaller than that of the to-be-measured steady water level, and the to-be-measured steady water level comprises initial steady water level, steady water level during water extraction measurement and steady water level after measurement; the water level measurement element is arranged at the water inlet end of the siphon to measure steady water level change of the water inlet end of the siphon; the water flow measurement unit is arranged at the water outlet end of the siphon to measure water outflow of the siphon. According to the measurement device for the permeability coefficient parameters of the low-permeability water-bearing layer and the method adopting the measurement device, the operation is simple and convenient, the water outflow is stable, data is accurate and reliable, and experimental period is short.

Description

technical field [0001] The invention relates to the field of measuring hydrogeological environment parameters, in particular to a device and method for measuring permeability coefficient parameters of low-permeability aquifers. Background technique [0002] At present, the conventional test methods used to obtain the parameters of the permeability coefficient include pumping test and water injection test. These two test methods are basically applied to aquifers with relatively high permeability coefficients, such as gravel soil and sand. [0003] The conventional pumping test is to pump groundwater from selected aquifers (groups) in selected boreholes or shafts to form an artificial drawdown field, and use the relationship between water inflow and water level drop over time to measure the richness of the aquifer (group) Tests of water levels and hydrogeological parameters. [0004] The water injection test is to inject water continuously and quantitatively into the borehole...

AI Technical Summary

Problems solved by technology

Although the water lifting test is simple in equipment and easy to operate, it is too much influenced by human factors, the water output is not easy to control, and the measurement of dynamic water level is not accurate, which leads to the low reliability of the obtained permeability coefficient.

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