Experimental device and method for simulating influence of external pollutants on sediment incipient motion and deposition

Abstract

The invention relates to an experimental device and an experimental method for simulating the influence of external pollutants on sediment incipient motion and deposition. The device comprises an annular water tank, a sampling unit, a control unit, a measuring unit and a shooting unit, wherein the sampling unit is used for injecting quantitative sand samples and external pollutants into the annular water tank; the control unit comprises a control host as well as a temperature control unit, a flow speed and flow quantity control unit which are connected with the control host; the measuring unitcomprises a pH value measuring unit, a suspended material concentration measuring unit, a water level measuring unit and a sampling unit; the sampling unit is used for extracting sediment water withdifferent water levels to measure sand content; and the shooting unit is used for shooting bed sand form in the annular water tank. The influence of the external pollutants on sediment incipient motion and deposition under different conditions is considered, positive significance in promoting sediment motion mechanics theory research and development is achieved, and important parameters are provided for research on riverway treatment, hydraulic engineering construction, shipping lane design, biological habitats and the like.

Description

technical field [0001] The invention relates to the field of sediment dynamics and environmental science and technology, in particular to an experimental device and method for simulating the influence of exogenous pollutants on sediment start-up and settlement. Background technique [0002] Sediment initiation and settlement is one of the basic problems in the study of sediment movement mechanics. The movement of sediment particles in the fluid is not only dependent on the flow characteristics, but also related to the hydrochemical conditions of the water body. With the deteriorating water environment, the chemical conditions of river water are also quietly changing. The traditional sediment start-up and settlement experiment device only focuses on the interaction between the characteristics of the sediment itself and the water flow, and does not consider the influence of multi-parameters of water quality in the actual environment, so there is a slight deviation from the ac...

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the traditional sediment start-up and sedimentation experimental devices only focus on the characteristics of the sediment itself and the interaction between the water flow, without considering the influence of water quality. So far, no patent has been found to study the effect of exogenous pollutants on sediment initiation and hydrodynamic settlement

Most of the relevant patents use open water tanks, which require manual sanding or manual injection of a certain amount of pollutants during use, which is extremely time-consuming and energy-intensive.

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