Device and method for groundwater level measurement and sampling at fixed depth

Abstract

The invention relates to a device and a method for groundwater level measurement and sampling at fixed depth and belongs to the technical field of underground water monitoring. The technical scheme isthat the device is lowered to a deep well or a drilling hole, and when a measuring cup (3) touches the surface of the water and sends out a colliding sound, the depth of the water level is recorded;the device continues to descend to a preset sampling depth, at this time, an adjustable sampling bottle cap (4) is pressed and opened in response to water pressure. Water enters the sampling bottle through a bottle mouth (8), and when the sampling bottle is filled with water, a measuring rope (1) is pulled. When no pressure difference exists between the inside and outside of the sampling bottle, the adjustable sampling bottle cap is moved upwards by the rebound hinge (10) until a bottle mouth cap cover card (12) blocks the adjustable sampling bottle cap. The adjustable sampling bottle cap is reset. The device has an advantage of low price and can be used for drilling and in various groundwater deep wells such as drill-and-excavation-combined wells and monitoring wells. The sampling processis simple, and the device is convenient to carry and maintain.

Description

technical field [0001] The invention relates to a device and method for groundwater level measurement and depth-fixed sampling, and belongs to the technical field of groundwater monitoring. Background technique [0002] Hebei Province is one of the areas with the highest groundwater utilization rate in my country. Various geological environmental problems caused by groundwater exploitation, such as land subsidence, groundwater pollution, soil salinization, and seawater intrusion, are very prominent. In order to better monitor groundwater levels, Due to dynamic changes such as water quality, national and provincial departments have built various groundwater monitoring stations, and the land department alone has reached more than 3,000. Due to the large number of groundwater monitoring points, the selection of sampling equipment is appropriate and other issues are related to the quality and efficiency of groundwater quality testing results. [0003] At present, there are many ...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many kinds of known groundwater samplers. Under different purposes and conditions, the structure and working principle of groundwater samplers are different, which causes certain restrictions on the use conditions of different samplers.

For example, at present, bucket samplers are commonly used as sampling tools. This method is simple to operate, but it can only sample surface water and cannot meet the requirements of taking water samples at different depths.

In addition, sampling methods such as high-pressure pumps and submersible pumps are also common, but corresponding electrical equipment is required, and the cost is high and maintenance costs are high. In some remote areas, it is often impossible to implement, which brings troubles to the sampling work.

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