Environmental Flows Monitoring System: The Core of Open Channel Flow Measurement

In fields such as water conservancy projects, urban water supply and drainage, and industrial wastewater discharge monitoring, accurate measurement of open channel flow is of crucial importance, and the Environmental Flows Monitoring System plays a key role.

Its working principle is based on the difference in the propagation speed of ultrasonic waves in water in the downstream and upstream directions. Ultrasonic transducers are installed on both sides of the open channel, with one transmitting ultrasonic waves and the other receiving. When flowing downstream, the propagation speed of ultrasonic waves is the sum of the speed of sound in water and the water flow speed, and when flowing upstream, it is the difference between the speed of sound in water and the water flow speed. By accurately measuring the propagation time in the downstream and upstream directions and using a specific formula, the water flow speed is calculated, and then combined with the cross-sectional area of the channel to obtain the flow rate.

This system has remarkable advantages. High-precision measurement can ensure the accuracy of flow rate calculation. As long as the installation and calibration are correct, the error is relatively small. Non-contact measurement avoids interference with the water flow and at the same time reduces the risk of equipment damage by impurities in the water. The real-time monitoring function enables it to assist in reservoir flood discharge and irrigation control in water conservancy projects; in urban water supply and drainage systems, it can monitor sewage and rainwater discharge to prevent waterlogging and ensure sewage treatment; when monitoring industrial wastewater discharge, it helps regulatory authorities supervise enterprises and prevent pollution.

The Environmental Flows Monitoring System has an accurate measurement principle, a complete system composition, significant technical advantages, and a wide range of application scenarios. It occupies an important position in flow monitoring and management in multiple fields and provides strong technical support and guarantee for related work.