Definition
Reservoir Rainfall Remote Monitoring and Early Warning refers to setting up rainfall stations in the reservoir area and upstream watershed (commonly tipping-bucket rain gauges, etc.), reporting rainfall intensity, accumulated rainfall, and equipment status according to the agreed business cycle, and integrating this data with water level gauges, seepage pressure, gate openings, and short-term meteorological forecasts. Hydrological or flood control models at the central side then calculate probability risks, trigger threshold alarms, and issue downstream early warnings via broadcast, SMS, or voice linkage.
Flash floods and reservoir safety rely on actual rainfall data to correct forecasts: minute-level or finer upstream data helps improve the timeliness of critical rainfall identification. Points are often located in mountainous areas or around the reservoir, making full coverage with wired private networks difficult. Cellular IoT SIM cards are commonly used as the main channel or private network backup, interfacing with the water information platform and emergency command system.
- Core data: Periodic rainfall, daily rainfall, rainfall intensity, station clock, and communication status.
- Linked objects: Water level process lines, flood release calculations, planned gates, and downstream risk lists.
Technical Features
On-site considerations must also include lightning protection and grounding, wide temperature range, and low power consumption (commonly solar + battery), and adapt to weak coverage in valleys: antenna selection, installation height, and operator frequency testing should be completed during construction. Reporting strategy should differentiate between increased frequency during flood season and reduced frequency in dry season, balancing air interface costs and business timeliness.
SimtoLink IoT SIM cards provide manageable and controllable cellular access for RTU/telemetry terminals, supporting public networks, private network APNs, multiple APNs, and combinations with directional data, facilitating platform-side whitelisting, session auditing, and traffic management. During the joint debugging phase, it is recommended to retain end-to-end samples (dial-up, DNS, TLS, business messages) as a reference for flood season troubleshooting.
- Reliability: Local caching, breakpoint resume, and key alerts can be configured for short-cycle or immediate reporting.
- Consistency: Unified time source (Beidou/NTP) to avoid threshold misjudgments due to cross-system time deviations.
Use Cases
Suitable for flood control, reservoir dispatch, emergency management, and small watershed flash flood warning; also used in urban waterlogging monitoring networks as a rainfall supplement. During large-scale deployment, a site ledger (stake number, coordinates, watershed affiliation, firmware version) should be established and aligned with the full SIM lifecycle (activation, transfer, suspension, cancellation) and change management processes.
From the delivery and acceptance perspective, besides "card online" status, end-to-end parsing success rate, latency percentiles, and cost controllability under flood season traffic models should be verified; sensitive location data and log retention periods should be classified and managed according to industry and local regulations.
Key points for cooperation with IoT SIM cards
Separate acceptance for "dial-up success" and "rainfall message logged successfully": In addition to card status, it is recommended to randomly verify the performance of DNS, TLS, and business platforms under long connections, weak network reconnections, and concentrated heavy rain reporting.
- Data Plan and Reporting Model: Calculate traffic according to the reporting granularity of per minute/5 minutes and the dry and rainy season strategy; during the flood season, temporarily increase the reporting frequency and set pooled threshold alerts to avoid abnormal traffic surges.
- Network and Coverage: Prioritize road testing and frequency band selection in mountainous areas; evaluate NB-IoT/Cat.1 compatibility with power supply and latency targets; when necessary, use dual SIMs with dual carriers or cellular backup for private networks.
- Strategy and Audit: Private network APN, fixed exit IP, roaming, and device-card binding should meet water conservancy platform and MLPS (Multi-Level Protection Scheme) access control requirements; ICCID should be registered with site number and IMEI.
- O&M Closed Loop: Silent SIMs, offline rates, and abnormal traffic enter work orders; preserve ICCID, APN, session, and message timestamp dimensions to facilitate troubleshooting during the flood season.
- Compliance: Collect and retain coordinates and logs according to the minimum necessary principle; contracts should specify cross-border and subcontracting boundaries.