What role does waterlogging point monitoring play?

　　 Waterlogging Point Monitoring What role does it play?

　　When heavy rainfall strikes, vehicles stranded in floodwaters are submerged by sudden accumulations beneath tunnels and sunken roadways. The water often fails to drain quickly, increasing the risk of fatal incidents in which occupants are unable to escape in time. Consequently, monitoring and early warning for inundation hotspots at underpasses and sunken roadways have become pressing and urgent issues.

　　Flood‑prone point monitoring integrates underpass and depressed‑road flood‑water level monitoring with traffic guidance. At tunnel entrances, localized warning systems such as LED guidance displays and warning lights are deployed to alert drivers to proceed with caution when water levels reach the alert threshold; when water levels reach a hazardous threshold, vehicles are advised to detour. This approach can directly reduce fatalities caused by vehicle submersion.

　　Real-time data from flood‑monitoring stations along relevant road segments will be integrated into the traffic command system, enabling authorities to promptly track water‑accumulation conditions. When water levels exceed critical thresholds, traffic safety will be ensured through measures such as coordinated control of intersection traffic signals, alerts on dynamic message signs, on‑site traffic management, and public‑address broadcasts. Meanwhile, urban‑flood warning data can be linked with map‑navigation apps to help route planners and real‑time navigation systems avoid flooded areas, allowing users to proactively steer clear of hazards and travel safely.

　　The system is equipped with water‑logging point monitoring, powered by a high‑capacity battery and installed at the lowest elevation within the tunnel. The terminal continuously tracks water levels using three-tiered alarm thresholds—50 mm, 150 mm, and 250 mm. Under normal conditions, it automatically collects rainfall and water‑level data every three minutes and transmits safety‑related information hourly, ensuring low‑power operation. When standing water is detected, the station switches to continuous water‑level monitoring every ten seconds, simultaneously broadcasting the data to relevant traffic‑guidance displays and activating alarms in the event of a disaster. The traffic‑guidance screens display red alert messages, while warning lights and audible alarms are triggered to capture drivers’ attention and direct them around flooded sections.

　　Monitoring of urban tunnel flooding hotspots; water-level early warning for stormwater, sewage, and power‑line manholes; water-level early warning for rivers, lakes, reservoirs, and other water bodies; and flash‑flood early warning for key areas such as scenic spots, tourist zones, warehouses, electrical distribution rooms, garages, and basements.

　　LED display screens, warning lights, and solar power systems have been installed at the road junctions near tunnel entrances.

　　The station communicates with the central station every 15 seconds, receiving commands to activate or deactivate alarms and displaying any text messages from the central station on its LED screen, such as weather updates or preconfigured alarm notifications. When the LED display shows an alarm message, a warning light is activated. Upon receiving the corresponding… Waterlogging Point Monitoring Upon receiving water-level alarm information, the system automatically switches to a red alarm state and activates the rotating warning light to guide drivers around flooded road sections.