Real-time monitoring device and method for sediment transport rates of suspended load and bed load

Abstract

The invention discloses a real-time monitoring device and method for sediment transport rates of suspended load and bed load. The device comprises an eccentric funnel with the edge flush with the riverbed surface, a transmission shaft driven by a first motor is arranged at the bottom of the eccentric funnel, and a sand weighing vessel is fixedly installed at the position, right opposite to an opening in the lower end of the eccentric funnel, of the transmission shaft. A pressure sensor is arranged at the bottom of the sand weighing vessel, a funnel-shaped sand storage chamber is arranged below the transmission shaft, a lower end opening of the sand storage chamber is connected with a bottom sand inlet of a sand conveying pipe inclining upwards, a spiral blade extending from the bottom sand inlet to an upper sand outlet is arranged in the sand conveying pipe, and the spiral blade is driven by a second motor. The device disclosed by the invention can effectively measure the sediment transport rates of the suspended load and the bed load of the river channel on the same cross section, is simple and convenient to operate, and has small disturbance to water flow conditions. The lifting device can be used for measuring the sediment transport rate of the suspended load at different heights of the same flow cross section, which is of great significance to laboratory simulation experiments.

Description

technical field [0001] The invention belongs to the field of river channel sediment transport rate measurement, in particular to a real-time monitoring device and method for river channel suspended and transported mass sediment transport rates in the field. Background technique [0002] The determination of river sediment transport rate is one of the important contents in the study of river sediment movement. Accurate and timely grasp of the sediment transport rate of the river channel is of great significance to the dredging of river reservoirs, river channel evolution, soil erosion control, flood peak capacity prediction, hydropower station protection, and even dam structure design. Although there are already many semi-theoretical and semi-empirical formulas for the calculation of sediment transport rate, very accurate results cannot be obtained yet. One of the most important reasons why the research on the sediment transport rate of suspended and moving mass is still not...

AI Technical Summary

Problems solved by technology

Although there are already many semi-theoretical and semi-empirical formulas for the calculation of the sediment transport rate, very accurate results cannot be obtained yet.

One of the most important reasons why the research on the sediment transport rate of suspended and transported mass is still not thorough is the lack of devices that can accurately detect the sediment transport rate.

Existing instruments for measuring the sediment transport rate of drifting mass are mainly based on sampling measurement. By collecting and drying the drifting mass, there are problems such as long measurement time, large disturbance to the water body, complicated operation, and limited measurement range.

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