Straight circulation water tank device for simulating resuspension of sediment under action of reversing currents

Abstract

The invention relates to a straight circulation water tank device for simulating resuspension of bottom mud sediment under the action of reversing currents. The straight circulation water tank device comprises a long and straight water tank, a bidirectional water supplying and discharging pipeline system, a water current power and control device and a flowing speed measuring and sampling device, wherein the long and straight water tank is connected with the water current power and control device through the bidirectional water supplying and discharging pipeline system, and the flowing speed measuring and sampling device is fixedly installed on the edge of the wall of the long and straight water tank, the water current power and control device provides power for water currents and controls the flowing speed and the flowing direction, the reversing currents are provided for the long and straight water tank through the bidirectional water supplying and discharging pipeline system, and thus resuspension of the sediment is achieved. The straight circulation water tank device has the advantages that the ups and downs and the resuspension of bottom mud under the action of the tide reversing currents in tidal reach can be simulated truly, and water samples at different depths can be collected under a certain hydraulic condition. The straight circulation water tank device is suitable for studying of quantitative relation among water, sediment and pollutants and is an effective device for studying the resuspension release effect of bottom mud pollutants in a river mouth area.

Description

technical field [0001] The invention relates to a circulating straight water tank device for simulating sediment resuspension under the action of reciprocating flow, which belongs to the technical field of water conservancy engineering and environmental engineering, and specifically relates to the simulation of resuspension and release of sediment pollutants in water environment under hydrodynamic disturbance. Especially in the reciprocating flow of the estuary affected by the tide, the resuspension of polluted sediments under different flow rates and different periodic disturbances simulates the circulating straight water tank device. Background technique [0002] Bottom sediment in the estuary area is generally viscous fine-grained sediment, which is the main carrier of pollutants such as heavy metals and organic matter. With the long-term input of exogenous pollutants, sediments have become an important destination and main reservoir of pollutants. The sediment-water int...

AI Technical Summary

Problems solved by technology

The triangular bottle type and the straight pipe type have considerable limitations due to their limited volume, and their hydrodynamic disturbance mechanism is quite different from the actual situation, and cannot reflect the flow field of the real water body and the resuspension and release of sediment pollutants. Therefore, the quantitative relationship between hydrodynamics-sediment resuspension-pollutant release cannot be studied

The simulated environment of straight trough is close to that of natural water body, but it generally flows in one direction, which cannot be realized in the hydrodynamic environment of tidal reciprocating flow.

The annular water tank converts the length of the straight tank into a time scale, and can change the direction of rotation and speed arbitrarily, but its water flow movement is closed, there is no flow condition, and the device will generate tangential force and centrifugal force when it moves, changing the water flow. The field structure makes the hydrodynamic conditions of sediment resuspension quite complicated

None of the current indoor simulation methods can simulate sediment resuspension under tidal reciprocating flow conditions

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