Hydropower Station Ecological Flow Monitoring System Solution
The ecological flow monitoring system for hydropower stations addresses the regulatory needs of water resources and environmental protection authorities regarding the minimum ecological discharge from hydropower stations. By deploying Doppler radar flow meters and radar water level gauges at the discharge outlets of hydropower stations, along with visual monitoring cameras, the system monitors the discharge flow in real time and compares it with the approved minimum ecological flow value. Data is automatically reported to the provincial regulatory platform via RTU terminals. The system supports automatic alerts for insufficient flow, video evidence collection of the discharge process, and statistical analysis of historical data, ensuring that hydropower stations release ecological flow in compliance with laws and regulations to maintain the health of river ecosystems.
Overview
Summary
The ecological flow monitoring system for hydropower stations addresses the regulatory needs of water resources and environmental protection authorities regarding the minimum ecological discharge from hydropower stations. By deploying Doppler radar flow meters and radar water level gauges at the discharge outlets of hydropower stations, along with visual monitoring cameras, the system monitors the discharge flow in real time and compares it with the approved minimum ecological flow value. Data is automatically reported to the provincial regulatory platform via RTU terminals. The system supports automatic alerts for insufficient flow, video evidence collection of the discharge process, and statistical analysis of historical data, ensuring that hydropower stations release ecological flow in compliance with laws and regulations to maintain the health of river ecosystems.
Key Advantages
Challenges
- Among the 47,000 small hydropower stations nationwide, a significant number experience reduced water flow or complete diversion, leading to downstream river channels drying up and severely impacting the ecological environment.
- Traditional manual flow measurement methods are inefficient, costly, and difficult to achieve continuous, all-weather monitoring.
- Some hydropower stations engage in the practice of surreptitiously reducing discharge flow during nighttime or dry seasons, and there is a lack of effective technical supervision measures.
- The water conservancy and environmental protection departments require real-time online data integration, as traditional offline monitoring cannot meet the data reporting requirements of the regulatory platform.
Results
- A Provincial Small Hydropower Ecological Flow Monitoring Project: Installed radar flow meters and video surveillance for 386 hydropower stations, increasing the real-time platform compliance rate from 62% to 97%, and restoring perennial flow to 56 water-reduced river sections.
- A water power station rectification project in a national-level nature reserve: 12 diversion-type power stations have been equipped with non-contact monitoring devices, with 24-hour video playback capability at discharge outlets. The compliance rate for ecological flow has reached 100%, and the project has successfully passed the environmental inspection and acceptance.
- Interconnected Supervision of Hydropower Stations in a River Basin: Covers 78 power stations across 3 rivers, with data uniformly integrated into the river basin management bureau's platform, enabling cross-regional ecological flow coordination and dispatch.
Solution Details
Hydropower Station Ecological Flow Monitoring System Solution
The Hydropower Station Ecological Flow Monitoring System is a comprehensive solution that utilizes Doppler radar flow meters, radar water level gauges, and visual monitoring equipment to achieve non-contact, continuous monitoring and video evidence collection of discharge flow at hydropower station outlets. This system provides critical technical assurance for compliant ecological flow management and the protection of river ecosystems by reporting data in real-time to water resources and environmental protection regulatory platforms.
Policy Background for Ecological Flow Compliance
National laws including the "Yangtze River Protection Law" and the "Yellow River Protection Law" explicitly mandate that hydropower stations must ensure the release of ecological flow. The Ministry of Water Resources has further issued notices requiring small hydropower stations to install online monitoring facilities, with data connected to provincial platforms.
With tens of thousands of small hydropower stations nationwide, issues like reduced or interrupted flow can lead to dried-up river channels and degraded ecosystems. Consequently, ecological flow compliance has become a key focus for central environmental protection inspections and large-scale provincial rectification projects.
System Architecture & Core Functions
Flow Monitoring with Doppler Radar
The Doppler radar flow meter measures surface velocity at the outlet. It calculates the flow rate by combining this velocity data with known cross-section parameters such as width and depth.
Water Level Monitoring & Verification
A radar water level gauge monitors the downstream river water level. This data is used for cross-validation with established stage-discharge curves, enhancing overall measurement reliability.
Video Surveillance for Evidence
A visual radar high-definition camera provides 24-hour live recording of the discharge outlet. Critical data like flow and water level is overlaid directly onto the video feed for a complete evidence record.
Secure Data Transmission & Reporting
An RTU terminal transmits data via 4G or BeiDou satellite. It reports to regulatory platforms using dual SZY206 and HJ 212 protocols to meet both water resources and environmental protection requirements.
Key Product Features of the Monitoring System
Non-contact Flow Monitoring Technology
The Doppler radar flowmeter is installed above the discharge outlet, requiring no in-water components that could obstruct flow. This non-contact method offers measurement accuracy of ±5% and is designed to be maintenance-free.
Radar Water Level Auxiliary Verification
The synchronized radar water level gauge monitors the downstream river, enabling cross-validation with the water level–discharge relationship curve. This dual-measurement approach significantly enhances the reliability of the flow data.
Visual Leakage Forensics and Compliance Alarms
High-definition cameras record 24/7 live footage, with data overlaid on the video to serve as enforcement evidence. The system automatically compares measured flow with the approved minimum ecological flow, triggering immediate alarms and recording non-compliant periods.
Multi-standard Protocol Integration and Power Supply
The solution supports dual SZY206 and HJ/T 212 protocols, allowing a single system to report to both Water Resources and Environmental Protection departments. For remote stations, a solar-powered independent supply with ultra-low-power RTUs eliminates the need for external grid power.
Recommended Product Configuration
| Function | Recommended Product | Description |
|---|---|---|
| Discharge Flow | Multi-band Doppler Radar Flow Meter | Non-contact flow measurement, integrates water level, velocity, flow, and camera |
| Water Level Monitoring | Visual Radar Water Level Gauge | Radar + HD camera, displays water level and video on the same screen |
| Auxiliary Water Level | Radar Level Gauge | Supplementary measurement point for the downstream river channel |
| Data Transmission | Hero V9 RTU (EC32 Hydrology Edition) | Dual SZY206+HJ 212 protocols, supports BeiDou+4G transmission |
Solution Advantages for Hydropower Stations
Compliance Assurance
Meets dual regulatory requirements from the Ministry of Water Resources and the Ministry of Ecology and Environment, supporting dual SZY206 and HJ 212 standards.
Complete Evidence Chain
Provides dual evidence of flow data + video footage, meeting stringent requirements for environmental inspections and law enforcement checks.
Easy Installation & Deployment
Non-contact installation does not affect discharge facilities, requires no flow interruption, and can typically be deployed in a single day.
Adapts to Harsh Environments
Features IP68 protection and an operating temperature range of -40~70°C, making it suitable for mountainous areas with high temperature differences and humidity.
Approach
How we implement intelligence into your infrastructure step by step.
Ecological Flow Requirements Assessment
Determine minimum ecological flow discharge standards based on upstream/downstream environmental needs and regulatory requirements
Non-contact Monitoring Deployment
Install Doppler radar flowmeters and visual radar level sensors at discharge points for non-contact synchronized monitoring
Remote Monitoring Platform Setup
Enable real-time data upload via 4G/5G RTU and establish platform integration with water authority supervision systems
Compliance Assurance & Evidence Recording
Configure automatic low-flow alerts and video documentation to ensure ecological flow compliance with evidence retention
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