A detection method for hyperpycnal flow in muddy water with high sand content

Abstract

The invention relates to a high-sand-content turbid water density current detection method. Density current data information is detected by a high-sand-content turbid water density current detection system. The method comprises the following steps that (a) a motor runs through a turntable to drive a measurement support rod to move up and down to detect data signals of different water depths in a reservoir; (b) a data processing module and a single-chip microcomputer control module process the data signals, and judge the formation of density current by margin calculation; (c) the single-chip microcomputer control module transmits a data signal result to an upper computer monitoring system through wireless GPRS (general packet radio service), and displays the data signal result in real time; (d) back-washing is performed after detection. According to the method, a four-beam technology and an ultrasonic beam area ratio method are used for detecting the sand content of water in the reservoir, and the ultrasonic speed CS, the sand content VC and the ambient temperature T are subjected to data fusion processing, so that measured data is accurate and high in reliability.

Description

technical field [0001] The invention relates to the field of detection of highly sandy and muddy water, in particular to a detection method for hyperpycnal flow of highly sandy and muddy water. Background technique [0002] my country is a country with serious flood disasters, and building reservoirs is an important engineering measure for human beings to reduce flood disasters. However, when reservoirs are built on rivers, especially sandy rivers, due to the water retaining effect of the dam, the flow velocity of the water flow decreases, and the sedimentation rate of the upstream sand in the reservoir area increases, resulting in a decrease in effective storage capacity and shortening the life of the reservoir. After the flood with a large amount of fine sediment in the reservoir enters the backwater area of ​​the reservoir, the coarse sediment in the muddy water cannot continue to be carried by the water flow, and deposits at the inlet of the reservoir. The clear water i...

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Problems solved by technology

However, due to the small range of the photoelectric sensor to measure the sediment concentration, this method can only measure the critical value of the sediment concentration in clear and muddy water, and cannot continuously measure the high sediment concentration and its vertical distribution.

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