What are the basic principles of an urban stormwater drainage network flow monitoring system?

　　Urban drainage Pipeline Network Flow Monitoring It is part of a city’s “smart city” initiative. By monitoring flow rates in the sewer network, relevant authorities can promptly determine whether roads are flooded, drainage is functioning normally, or pipes are blocked, thereby enhancing the management of urban stormwater and wastewater systems. This approach helps reduce the occurrence of emergencies and prevents loss of life and property. The urban sewage‑network flow‑monitoring system is an integrated, online automated monitoring platform that combines flow‑measurement instruments, advanced sensing technologies, automatic measurement and control systems, computer applications, specialized analytical software, and communication networks. It enables real-time monitoring of underground sewage flow within the urban network, with the collected data supporting the management and maintenance of the sewer infrastructure. Below, we will introduce the basic principles of pipeline‑flow monitoring:

　　I. Composition of Pipeline Network Flow Monitoring Equipment

　　The drainage network flow monitoring system is responsible for measuring flow rate, flow velocity, water level, and water temperature during the drainage process, and it also allows users to customize parameters such as pH, electrical conductivity, and turbidity. The system comprises the following major components:

　　1. Velocity and flow measurement sensors: typically ultrasonic Doppler velocity and flow meters.

　　2. Network‑node host: Its functions include providing long‑term power supply, managing the power of sensors, and achieving low power consumption.

3. Data conversion and transmission from industrial buses to Ethernet.

　　4. Cloud Platform: Provides on-site project management, receives monitoring data, and enables data storage, visualization, and download.

　　5. Installation accessories: dedicated flowmeter mounting bracket, pipeline network host mounting bracket, flow meter card, and accompanying commissioning tools, etc.

　　II. Functions of the Urban Drainage Network Flow Monitoring System

　　1. Monitor key nodes in the urban pipe network to promptly detect urban flooding.

　　2. Provide timely early-warning information on pipeline network operations to support decision-making for emergency flood‑control efforts.

　　3. Identify bottleneck segments in the drainage pipeline network to provide a basis for network renovation.

　　4. Provide analytical data to assess the drainage capacity of low-lying, flood-prone areas.

　　5. Trace the operational history of the pipeline network to support accident analysis.

　　III. Characteristics of the Urban Drainage Network Flow Monitoring System

　　1. Device: Waterproof, battery-powered, and operates at ultra-low power.

　　2. Versatile functionality: Functions can be flexibly customized to meet specific requirements, and the system can monitor water flow rate, flow velocity, water level, and temperature.

　　3. High compatibility: It can be integrated with a wide range of monitoring instruments and sensing devices. It can also connect to other application platforms via databases and other interfaces.

　　4. Convenient maintenance: The pipeline network monitoring system supports remote parameter configuration and remote equipment maintenance.

　　IV. Installation Method

　　The Doppler ultrasonic flowmeter is mounted at the lower end of the pipeline using an easily removable mounting bracket. The radar water level sensor and its lithium‑battery power system are installed at the wellhead, directly beneath the manhole cover. The radar water level sensor monitors the water level inside the inspection well and allows for straightforward battery replacement during communication and subsequent maintenance. The mounting bracket is made of stainless steel, features a modular design, and is easy to assemble, expand, and disassemble.

　　City Pipeline Network Flow Monitoring It undertakes the critical functions of urban flood control and drainage, as well as sewage collection and transportation, making it one of the essential components of urban infrastructure. It is vital to the stable development of the socio‑economic system and the well‑being of the population, playing a key role in ensuring the sustainable growth and safe operation of cities.