Water-sand interface pollutant transport experiment device and implementation method thereof

Abstract

The invention discloses a water-sand interface pollutant transport experiment device and an implementation method thereof. The experimental device comprises: an experimental solution tank connected with a water tank main body; a multi-pump linkage system formed by connecting five groups of centrifugal pumps and valves in parallel; an upstream pool located at the front end of the water tank; a simulation river bed water tank main body and a sediment retaining pool; a multi-frequency water level control system comprising a drive system, a transmission system and a water level control valve; anda tail pool arranged at the tail end of the water tank. The experiment method mainly comprises the steps of: establishing an indoor circulating water tank and an experimental sand slope, and regulating the circular flow and the size and frequency of the water depth to simulate the transport of the pollutants at a water-sand interface under the duration drive of different flood peaks and flood. Theexperiment data and the related parameters are collected to simulate the transport of the pollutants at the water-sand interface under the multi-frequency flood drive to reflect the influences of different-parameter floods of the river on the transport of the pollutants at the water-sand interface and the phreatic zone, the experiment device can change a plurality of flood parameters such as theflow, the flow change frequency, the water level and the water level change frequency, and therefore, the experiment is convenient, and the achievement is intuitive.

Description

technical field [0001] The invention belongs to the field of water conservancy engineering, in particular to an experimental device for transporting pollutants at the water-sand interface and an implementation method thereof. Background technique [0002] In recent years, with the rapid development of social economy, a large amount of industrial and agricultural wastewater has been discharged into the surface water body, which has a huge impact on the ecological health of the river. Groundwater enters the hyporheic zone, which has a huge impact on the ecological cycle in the hyporheic zone. However, floods in the flood season strengthen the turbulence of the surface water body, increase the exchange of subsurface currents, and increase the intensity of pollutants entering and leaving the water-sand interface. However, there are still many mechanism issues for pollutant transport under the action of multi-frequency floods. At the same time, specific issues such as the impact...

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Problems solved by technology

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an experimental device for transporting pollutants at the water-sand interface and its implementation method, which can solve the problem of different flow velocities, water depths, and flood frequencies in simulated river water-sand interfaces and subsurface flow zones. The transport of pollutants under various parameters such as , flood peak size, etc.

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