Riverbed vertical undercurrent switching testing device under driving of pulsating pressure and production method thereof

Abstract

The invention discloses a riverbed vertical undercurrent switching testing device under driving of pulsating pressure and a production method thereof. The riverbed vertical undercurrent switching testing device is characterized in that an earth surface water level is in periodic sinusoidal fluctuation, and pulsating pressure of a riverbed interface is caused; by using an automatic elevating water level control system, a water level simple harmonic vibration control chamber, and a riverbed water trough model, periodic fluctuation of a riverbed earth surface water level similar to a trigonometric function is generated, and the pulsating pressure generated by the water level fluctuation is used to drive an undercurrent switching function in the vertical direction of the riverbed. The riverbed vertical undercurrent switching testing device is advantageous in that the function of the pulsating pressure generated by the water level fluctuation used as a unique driving force of a riverbed undercurrent switching test is realized, and the riverbed vertical undercurrent switching testing device is used to break through limitations of conventional water trough tests only adopting methods of changing of riverbed topography and earth surface water flow velocity. The technological verification of the device is feasible, and an integrated structure has strong coordination performance, and model production and test operation are convenient.

Description

technical field [0001] The invention relates to a test device, in particular to a test device for vertical subsurface flow exchange of a riverbed driven by pulsating pressure. Background technique [0002] Subsurface exchange is the exchange of substances (water, conservative solutes, reactive solutes), particles and colloids between the channel and the saturated sediment near the channel caused by the exchange between surface water and groundwater in the subsurface zone. The process of subsurface exchange is of great significance to the accurate evaluation of water resources in the basin, the ecosystem in the subsurface zone and the health of the river ecosystem. It is the most direct and effective means to study the process and mechanism of subsurface exchange through experiments. [0003] At present, there are mainly two forms of subsurface exchange tests: indoor tank test and field monitoring test. Field monitoring tests usually adopt the form of setting up observation...

AI Technical Summary

Problems solved by technology

These models mainly achieve the pulse effect of floods by changing the shape of the river bed, flow conditions, or using the overall rise and fall of the water level of the tank, and cannot realize the study of the vertical subsurface flow exchange process of the river bed under the action of fluctuating pressure as the only driving force.

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