A water-sand interface water sampling system and sampling method thereof

Abstract

The invention discloses a water-sand interface water sampling system and a sampling method thereof, comprising a surface water body sampling device and a shallow pore water sampling device. The surface water sampling device includes a vacuum sampling tube for collecting surface water samples, a filter screen for filtering impurities at the head of the sampling tube, a retractable needle connected to the sampling tube, the needle is fixed on an upright iron rod, and the top and middle of the iron rod are connected to a Strong rubber band and compressed spring, the end of the sampling tube has a closed and stable vertically distributed vacuum sampling tube plug and wooden rod, a pair of welded electromagnets on the base and top of the surface water sampling device, and a rubber material next to the electromagnet A cylindrical mold that is open at both ends. The present invention combines the principle of mechanical automation and realizes simultaneous sampling of water-sand interface water samples (surface water, shallow pore water) through reasonable structural design. It is widely used, highly automated, and economical, and can greatly save labor sampling costs.

Description

technical field [0001] The invention relates to the field of water body monitoring, in particular to a water-sand interface water sampling system and a sampling method thereof. Background technique [0002] For a long time, my country's river water pollution problem has been very serious. Every year, a large amount of industrial wastewater and domestic sewage are directly discharged into surface water without treatment, resulting in a very rapid deterioration of water quality. In addition to surface water, shallow groundwater (pore water) is also one of the important water sources for society due to its special distribution characteristics. According to survey data released by various agencies in recent years, more and more groundwater has also been polluted to varying degrees. However, the current treatment of rivers still only stays in surface water, and cannot fundamentally restore the ecological health of rivers. Sediment, as a member of the river ecosystem, has a stron...

AI Technical Summary

Problems solved by technology

However, the current sampling method for the water body near the water-sand interface has been difficult to capture due to technical difficulties. The accuracy of the water depth (difficult to be accurate to the centimeter level) is very high, and it is difficult to locate this position.

Capturing this vertical gradient of pollutant concentration requires specially designed high-resolution sensors and samplers at high cost

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