A device for simulating in-situ sediment resuspension in a reciprocating channel and its simulation process

Abstract

The invention relates to a device for simulating reciprocating flow riverway in-situ bottom mud resuspension and a simulation technology thereof. According to the device for simulating the reciprocating flow riverway in-situ bottom mud resuspension, an upstream flow water level control device comprises a first water inlet pipe, an upstream water level control water tank, an upstream backflow simulation water tank, a first siphon backflow pipe and a first water outlet pipe; a water tank device comprises a water tank body, a bottom mud tank, a flow velocity gauge, a turbidity meter and at least two sampling ports; a downstream tide simulation control device comprises a tide water level control tank, a second siphon backflow pipe, a tide backflow simulation water tank, a backflow water tank, an overflow pipe, a variable frequency water pump and a second water outlet pipe; an experiment platform automatic control device comprises a first resistance-type liquid level meter, a second resistance-type liquid level meter, a first pulling line, a second pulling line, a first direct current brushless motor, a second direct current brushless motor, a first movable pulling plate and a second movable pulling plate. The simulation technology comprises the steps of bottom mud preparing, overlying water preparing, flow velocity gauge and turbidity meter installing, unidirectional flow simulating, tide reciprocating flow simulating and water sample measuring. The simulation accuracy is high, and the device for simulating the reciprocating flow riverway in-situ bottom mud resuspension and the simulation technology thereof can be popularized.

Description

Technical field [0001] The invention belongs to the technical field of water body ecological environment, and relates to a reciprocating flow channel simulation device, in particular to a device for simulating the in-situ sediment resuspension of a reciprocating flow channel and a simulation process thereof. Background technique [0002] Estuary is the confluence area between river and ocean, and it is also the most valuable ecosystem with human activities. With the rapid growth of my country's population and rapid economic development, water quality and eutrophication problems in estuaries have become increasingly prominent, as well as heavy metals and organic pollutants in river sediments in certain estuaries. In recent years, the implementation of water transfer projects, reservoir projects, and river improvement projects has reduced the discharge of rivers and directly caused the increase in the upstream distance of tidal seawater. At the same time, it has also caused an incr...

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Problems solved by technology

However, there are still the following deficiencies. First, the flow field generated under the regulation of the pump station and the solenoid valve cannot truly simulate the actual flow field of the river tide (especially in the estuary area), and the complex flow field cannot be simulated well due to the different state of the flow field. Second, the water tank adopts vertical grooves. In the test, the flow field changes after the sediment at the edge of the groove is washed, which destroys the layered result of the sediment and affects the simulation results of sediment resuspension.

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