1. Project Background
During flood season, water levels in rivers and reservoirs can change rapidly due to continuous rainfall. If water level changes are not detected in time, flooding risks increase significantly.
Traditional manual inspections are slow, data is not continuous, and inspections during heavy rain pose safety risks. To improve monitoring efficiency and safety, an unattended water level monitoring system based on radar level sensors, 4G wireless transmission, and a cloud platform was implemented.
The solution enables continuous water level monitoring, real-time data upload, and automatic early warning without on-site personnel.
2. Measurement Challenges
Flood-season water level monitoring mainly faces the following issues:
| Challenge | Description |
|---|---|
| Rapid level changes | Water level can rise sharply within a short time |
| Harsh environment | Rain, fog, foam, dust, and extreme temperatures |
| Remote locations | No grid power or wired communication |
| Safety risks | Manual inspection during storms is dangerous |
3. Solution
The system adopts a simple three-layer structure: Radar Sensor + 4G DTU + Cloud Platform, forming a complete unattended monitoring solution.
3.1 Equipment Configuration
| Layer | Device | Function |
|---|---|---|
| Perception | Radar level sensor | Non-contact water level measurement |
| Transmission | 4G DTU | Wireless data upload |
| Platform | Cloud platform | Monitoring, alarm, data storage |
3.2 Implementation Process
- Install the radar level sensor above the water surface (bridge, reservoir wall, or bracket).
- Connect the sensor to the 4G DTU via RS485 and supply power using battery or solar power.
- Register the device on the cloud platform and verify data transmission.
- Set reporting interval and alarm thresholds remotely.
- Start long-term unattended operation.
No complex wiring or frequent maintenance is required.
4. Project Results
After deployment, the system achieved stable operation during the flood season:
- Continuous 24/7 water level monitoring
- Real-time data upload with stable 4G communication
- Alarm response time ≤10 seconds after threshold is exceeded
- Manual inspections greatly reduced
- Personnel safety significantly improved
The radar measurement remains stable even in rain, fog, and foam conditions.
5. Conclusion
This unattended water level monitoring solution meets the key flood control requirements of accuracy, real-time response, and safety. By combining radar level measurement, wireless transmission, and cloud-based early warning, flood monitoring shifts from manual inspection to automatic early warning.
The solution is suitable for rivers, reservoirs, flood channels, and urban drainage systems, and can be quickly deployed for long-term operation. With reliable data support and minimal maintenance, it provides practical value for flood prevention and water level management.
For more technical details, wiring diagrams, or model selection guidance, please click here to learn more or contact our technical team.
