Circulating water test device for particulate matrix river channel

Abstract

The invention relates to a circulating water test device for a particulate matrix river channel. The circulating water test device comprises a main tank, an upstream collecting tank , a downstream collecting tank, a particulate matrix layer, a pressure measuring pipe, a multi-parameter water quality monitor, a sand trap, a submersible pump, a flow regulating valve, a water return pipe and a movable sampling ladder, wherein the main tank is connected with the upstream connecting tank through an upstream water passing tank, the main tank is connected with the downstream collecting tank through adownstream water passing tank, the sand trap is arranged at the downstream water passing tank, the multi-parameter water quality monitor and the submersible pump are arranged in the downstream connecting tank, the water outlet of the submersible pump is connected with the flow regulating valve, and the flow regulating valve is connected with the upstream collecting tank by a hose. The particulatematrix required for the test is paved in the main tank, and different types of river systems are established according to the needs. According to the invention, the test device can establish different types of channel models composed of various matrixes, and simulate the state of the river after long-term operation, and relatively complete equipment is provided for the study of the influence mechanism of the river morphology on the self-purification ability of the river.

Description

technical field [0001] The invention relates to a test device for circulating water of a granular matrix river course, which belongs to the technical field of river water research. Background technique [0002] River water pollution is one of the most serious environmental problems in my country. In the process of urbanization, there are often phenomena of river reconstruction such as competition for land with water, filling of river courses, and straightening of bends. Changes in water quality are closely related. For example, changes in the ecological type and distribution characteristics of plants brought about by changes in the topography of rivers, differences in ecological functions and bank stability brought about by changes in the matrix of river bank slopes, changes in the habitats of river banks lead to different microbial functions, Changes to the curvature of the river lead to changes in the flow regime of overlying water and pore water, all of which have varying...

AI Technical Summary

Problems solved by technology

However, due to the uncontrollability of natural conditions, it is difficult to accurately control variable conditions

Moreover, there are limitations in field monitoring, and effective hydraulic tests cannot be carried out. Therefore, it is necessary to conduct research on the relationship between river morphology and water self-purification capacity in a controlled environment in the laboratory.

Most of the existing circulating water test models are fixed-bed channel models, which can only simulate the flow conditions of simple lining channels, but cannot simulate the flow conditions of different forms of channels on sand, gravel, stone, soil and other loose materials, nor can they simulate the flow conditions of rivers. It is difficult to explore the influence mechanism of river form on water quality in a deeper level because it is difficult to accurately measure indicators such as the degree of scour, the intensity of subsurface flow exchange, and the quality of pore water in the bank slope matrix.

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