Combined control device for groundwater mining amount and groundwater level in well irrigation area

Abstract

The invention discloses a combined control device for groundwater mining amount and groundwater level in a well irrigation area. The combined control device comprises a water level monitoring device,a water pumping well pipe and a water quantity monitoring device, wherein the water level monitoring device is arranged at one side of the water pumping well pipe, the water quantity monitoring deviceis arranged on a pipe wall of the top of the water pumping well pipe, the water pumping well pipe is provided with a water outlet at one end close to the water quantity monitoring device, an electromagnetic control valve is arranged at one side, close to the water outlet, of the water quantity monitoring device, and the electromagnetic control valve is arranged on the pipe wall of the water pumping well pipe. The invention achieves the beneficial effects that the combined control device for the groundwater mining amount and groundwater level in the well irrigation area is especially applicable to a liquid-solid two phase fluid, such as high-salinity water and muddy water, of solid particles as a measurement channel is a smooth straight pipe and can not be blocked; no pressure loss is produced, and energy-saving effect is good; the combined control device is not influenced by humidity, density, viscosity, pressure and electrical conductivity change of the fluid; and a flow range is large, and a caliber range is wide.

Description

technical field [0001] The invention relates to a combined control device for groundwater exploitation volume and groundwater level in well irrigation areas, and belongs to the technical field of groundwater exploitation implementation monitoring and dynamic management. Background technique [0002] At present, the overexploitation control and water level control of groundwater in agricultural irrigation areas are mainly based on post-event management, or separate monitoring and control methods for extraction volume and water level. The more advanced groundwater depth sounder known at present is to put a probe into the logging well with a wire. The wire is marked with a scale. The rear end of the wire is connected to the receiver. The scale on the wire is the height from the water surface to the ground, that is, the buried depth. But its problem is that the thermal expansion and contraction coefficient of the wire is large, and the measurement accuracy is affected to a cert...

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Problems solved by technology

But its problem is that the thermal expansion and cold contraction coefficient of the wire is large, because the logging must be measured in winter and summer, which has a certain impact on the measurement accuracy

Moreover, the scale on the wire is only accurate to 5 cm and the measurement requirement is accurate to 1 cm, so the accuracy is not enough

The wire is easy to stretch after being retracted and unwound many times, and it is easy to break the wire from the inside, causing the instrument to be scrapped, and the instrument is very expensive

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