Multi-layered aquifer underground flow system-based underground water pollution simulator

Abstract

The invention provides a multi-layered aquifer underground flow system-based underground water pollution simulator, which comprises a simulation groove, a pressure measurement device, water head adjustment devices and a rainfall device, wherein the simulation groove comprises a seepage groove, an upstream water tank and a downstream water tank which are positioned on two sides of the seepage groove; front and back sides of the seepage groove are respectively provided with uniformly distributed sampling holes and pressure measurement holes, and the pressure measurement holes are connected with the pressure measurement device; two water head adjustment devices correspond to the upstream water tank and the downstream water tank respectively, and each water head adjustment device comprises a bracket, an overflow box, a water pipe and a lift rod; the rainfall device is positioned above the seepage groove, rainfall holes are uniformly distributed on a pipeline of the rainfall device; and one end of the pipeline is sealed, and the other end of the pipeline is connected with a water source. The multi-layered aquifer underground flow system-based underground water pollution simulator can simulate an underground waterflow system of a plurality of aquifers and aquitards, is convenient in measurement, and has small error.

Description

technical field [0001] The invention provides a groundwater pollution simulation device based on the groundwater flow system of a multilayer aquifer, which is mainly used for simulating solute migration in the groundwater flow system and belongs to the field of hydrogeological research. Background technique [0002] With the over-exploitation of groundwater, human activities are intensifying, and the groundwater pollution caused by factors such as seawater intrusion, garbage seepage, intrusion of upper saline water into lower freshwater, and sewage recharge are becoming more and more serious. The prediction and prevention of groundwater pollution is particularly important. important. As an important research method for such problems, the indoor physical simulator has many advantages. As the main tool for physical simulation, the groundwater simulation device affects the development of the field of physical simulation research. In recent years, a large number of such devices ...

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Problems solved by technology

[0003] For example, the two-dimensional hydrodynamic dispersion tank developed by predecessors can simulate the convective dispersion of pollutants in the aquifer and can measure the diffusion coefficient, but the instrument can only simulate a single aquifer; Groundwater pollution simulation tank, the device can simulate multiple aquifers, but cannot individually adjust the hydrodynamic conditions of each aquifer

[0004] According to previous studies, the current groundwater pollution simulator has the following defects: First, in terms of simulating the field aquifer, the physical simulation device used at this stage can only adjust one aquifer or cannot control the hydrodynamic conditions alone However, most of the field conditions are multi-layer aquifer systems, so that the experimental results are difficult to match with the field conditions; secondly, all the sand tank models at this stage are planar models similar to seawater intrusion, and lack the ability to study vertical intrusion. seepage simulator

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