Coastal aquifer layered variable-density water body underground water flow simulation device and use method thereof

Abstract

The invention relates to a coastal aquifer layered variable-density water body underground water flow simulation device which comprises a main body box, two water-permeable baffle plates with a plurality of water-permeable holes are fixed in the main box body and are oppositely arranged, the main box body is divided into a first cavity, a second cavity and a third cavity by the two water-permeablebaffle plates, the first cavity, the second cavity and the third cavity are sequentially communicated, and the second cavity is filled with a porous medium. The device further comprises a fresh watersystem and at least two saline water systems, the at least two saline water systems are sequentially distributed from the top to bottom, each saline water system comprises a saline water outlet system which communicates with the first cavity and a communication part is in an upper part, each saline water system further comprises a saline water inlet system which communicates with the first cavityand a communication part is in a lower part, and the fresh water system comprises a fresh water inlet system and a fresh water outlet system which communicate with the third cavity.

Description

Technical field [0001] The invention relates to the field of freshwater resource research, in particular to a groundwater flow simulation device and a use method for a stratified variable density water body in coastal aquifers. Background technique [0002] The brackish water interface is a common phenomenon in coastal aquifers. Understanding the structure of the brackish and fresh water interface in the coastal aquifer and the universal flow pattern is very important for water resources management and planning. Numerical simulation is used to predict the location and migration process of the brackish-fresh water interface, support and correct field observations, and simulate the movement of the brackish-fresh water interface under the conditions of sea level or water level changes. However, indoor physical simulation experiments are usually quantified by numerical simulation. Although the variable-density groundwater flow-solute transport model has been relatively common in th...

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Problems solved by technology

Although the variable-density groundwater flow-solute transport model has been relatively common in the field of seawater intrusion research, most of the existing studies have not considered the layered variable-density flow distribution, especially in the complex hydrogeological conditions in the field. Difficult, it is necessary to consider the effects of saltwater intrusion into freshwater aquifers of different densities under unsteady conditions from the perspective of physical simulation, and a more accurate conceptual model can be obtained

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