A portable groundwater depth-fixed sampling device, sampling system and sampling method

Abstract

The portable groundwater depth-determining sampling device, sampling system and sampling method of the present invention belong to the field of site pollution investigation and risk assessment. By setting a movable barrier air bag, the stagnant water located at the upper and lower ends of the groundwater sampling probe in the well pipe is effectively blocked. It can accurately collect groundwater samples at the depth where the sampling probe is located, avoiding the problem of sample dilution caused by the mixing of upper and lower water samples in the well pipe during the traditional method of well cleaning and sampling, and improving the accuracy of concentration detection. The invention can accurately collect groundwater samples at different depths in the same monitoring well, realize fixed-depth sampling, and significantly reduce costs. In addition, the present invention effectively blocks stagnant water in the upper and lower layers of the groundwater sampling probe in the well pipe, which can reduce the volume of well washing before sampling, save sampling time, improve sampling efficiency, reduce the production of well washing waste water, and further reduce sampling costs. Reduce the disturbance to the groundwater in the well pipe and ensure the accuracy of the detected concentration.

Description

technical field [0001] The invention belongs to the field of site pollution investigation and risk assessment, and specifically relates to a portable groundwater depth-fixed sampling device, a sampling system and a sampling method. Background technique [0002] According to the laws and regulations of our country, before redevelopment and utilization of the land used by industrial enterprises left after the closure and relocation, it is necessary to conduct soil and groundwater pollution investigations in accordance with relevant national technical specifications, and carry out risk assessment in combination with the future land use planning of the site. Among them, for the investigation of groundwater pollution status, at present, it is mainly to collect typical groundwater samples for pollutant detection to characterize its pollution status. Due to the anisotropic spatial heterogeneity of site hydrogeology, the vertical distribution of pollutants in groundwater is generall...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a portable groundwater fixed-depth sampling device, sampling system and sampling method to solve the traditional method of collecting typical samples of groundwater at different depths, which requires the construction of group wells, and there is a technical problem that the cost of drilling and building wells is relatively high

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