SL/T 34-2023 in English
VALIDTechnical regulations for hydrologic network design
- Issued on:2023-10-24
- Implemented on:2024-01-24
- File Format:PDF
- Delivery:Via email within 5 business days
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Introduction
Core changes in the standard revision
| Revision dimensions | SL34-2013 | SL/T34-2023 | Technological breakthroughs |
|---|---|---|---|
| Monitoring elements | 8 types of station networks | 3 new types of water ecological station networks, rainfall radar stations, and remote sensing monitoring points | Expanded to 11 types of monitoring systems |
| Technical architecture | Mainly ground monitoring | Integrated air-ground monitoring | Multi-dimensional coordination of radar + satellite + ground stations |
| Evaluation mechanism | No special regulations | New Chapter 18 Station Network Evaluation | Establish a quantitative evaluation index system |
Key technological innovations
1. Hierarchical control of flow station network
A three-level control system is adopted:
- Large river control station: arid area> 5000km², humid area> 3000km², with an allowable error of 5-15%
- Regional representative station: it is necessary to verify that the hydrological zoning qualification rate is ≥70%
- Small river station: arid area<500km², humid area<200km²
Example: According to the new standard, the number of control stations in the Yangtze River Basin needs to be increased by 12%
2. Water Ecological Monitoring Specifications
For the first time, the definition of water ecological stations is clarified, and the following requirements are required:
- Comparison stations are required in rapid/slow flow areas of rivers
- Lake reservoirs are arranged according to the ratio of deep water area: shallow water area=1:2
- Biological indicators are collected synchronously with multi-parameter water quality monitoring instruments
Solutions to implementation difficulties
| Problem type | Standard clause | Countermeasures |
|---|---|---|
| Impact of water-related projects | 19.3.4 | Establish a three-level impact assessment mechanism (<10% slight, 10-50% moderate, >50% severe) |
| Plain river network monitoring | 5.3.7 | Adopt the water balance perimeter method in combination with ADCP navigation measurement |
| Data-scarce areas | 4.3.3c | Combined zoning of geographical landscape method + storm flood parameter method |
Typical application scenarios
Water network monitoring in the Guangdong-Hong Kong-Macao Greater Bay Area
According to clause 6.3.2 of the standard:
- Deploy 7 tide station clusters
- Use radar water level gauge + video surveillance dual redundancy
- Station spacing ≤15km to meet tidal process control
Recommendations for standard implementation
- Phase-based transformation: Prioritize the completion of large river control stations and ecologically sensitive area stations
- Intelligent monitoring: Configure Internet of Things telemetry terminals at newly built stations
- Dynamic evaluation: Conduct station network function evaluation every 5 years (refer to Appendix A indicators)
Sample only — not a preview of SL/T 34-2023
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