Device for simulating reciprocating flow riverway in-situ bottom mud resuspension and simulation technology thereof

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 in-situ sediment resuspension in a reciprocating flow channel and a simulation process thereof. Background technique [0002] The estuary is the confluence area between the river and the ocean, and it is also the most valuable ecosystem related to human activities. With the rapid growth of population and rapid economic development in our country, the problems of water quality and eutrophication in estuary areas have become increasingly prominent, and pollutants such as heavy metals and organic matter in river sediments in some estuary areas have exceeded the standard. In recent years, the implementation of water diversion projects, reservoir projects, and river regulation projects has resulted in a decrease in the discharge of rivers, which directly increases the ups...

AI Technical Summary

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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