Real-time automatic monitoring method and real-time automatic monitoring system for underground light non-aqueous phase liquid pollutant dispersion

Abstract

The invention provides a real-time automatic monitoring method and a real-time automatic monitoring system for underground light non-aqueous phase liquid pollutant dispersion. The method comprises the following steps: taking a monitoring point location; obtaining a resistance variation range E after characteristic LNAPLs pollutant and characteristic LNAPLs pollution is caused at the monitoring point location; determining the length of a resistance probe; determining a distance between electrode rings; hanging one set of resistance monitoring device in a monitoring well according to an underground water flow direction; respectively injecting at least one set of resistance monitoring device at monitoring point locations upstream and downstream underground water; setting collecting parameters; transmitting monitoring data in real time; and automatically alarming when the resistance reaches the lower limit of the E. The real-time automatic monitoring method provided by the invention has the advantages of simple operation, accurate measurement and reliable operation; data can be monitored in real time and wirelessly transmitted; the diffusion process of the LNAPLs after leaking can be dynamically monitored in real time; the redistribution process of the LNAPLs can be also monitored during extracting rainfall or underground water; and the real-time automatic monitoring method provided by the invention can be widely applied to dynamic monitoring of underground pollution after the LNAPLs is leaked in large-scale petrochemical enterprises, gas stations and so on.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, in particular to a real-time automatic monitoring method and system for the diffusion of underground light non-aqueous liquid pollutants (LNAPLs). Background technique [0002] Groundwater is an important part of water resources. Due to its stable water quantity and good water quality, it is one of the important water sources for agricultural irrigation, industrial mines and cities. However, with the continuous and vigorous development of industry, groundwater is facing a serious pollution crisis. At present, the underground pollution of organic pollutants has been paid more and more attention in the world. The solubility of most organic pollutants in water is very small, and they are incompatible with water and air underground and exist in the form of liquid phase. In research, such pollutants are generally called non-aqueous phase liquids, namely NAPLs (non- Aqueous phase liqu...

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Problems solved by technology

[0005] In order to solve the problems of high cost, complicated operation, and inability to monitor in real time in the existing monitoring methods, the present invention provides a real-time automatic monitoring method and system for the diffusion of underground light non-aqueous liquid pollutants, which can monitor the diffusion of LNAPLs after leakage in real time process and redistribution of LNAPLs during rainfall or groundwater abstraction

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