SL/Z 720-2015 in English
VALIDGuidelines for emergency preparedness plan of reservoir dam safety management
- Issued on:2015-09-22
- Implemented on:2015-12-22
- File Format:PDF
- Delivery:Via email within 1~3 business days
$262.00
Introduction
Standard Background and Scope of Application
This standard was issued by the Ministry of Water Resources in 2015. It aims to standardize the preparation process of emergency response plans for reservoir and dam safety management. It is applicable to large and medium-sized reservoirs, and can be used as a reference for small reservoirs. Its technical content is based on the "Regulations on the Preparation of Water Conservancy Technical Standards" (SL 1-2014), integrating domestic and foreign reservoir safety management practices.
Core content analysis
1. Emergency classification standards
| Level | Engineering hazard characteristics | Loss of life/economic loss | Social and environmental impact |
|---|---|---|---|
| Grade I (Extremely Serious) | Water level reaches the verified flood level or the dam is very likely to burst | ≥30 people or ≥100 million yuan | Extremely serious |
| Grade II (Serious) | Serious hazard occurs but is basically controllable | 10-30 people or 50-100 million yuan | Serious |
| Grade III (major) | Major danger and good rescue conditions | 3-10 people or 10-50 million yuan | Major |
| Grade IV (general) | General danger is completely controllable | <3 people or <10 million yuan | General |
Case: A reservoir dam leaked due to an excessive flood, which was identified as a Grade II event. After the orange warning was activated, the dam burst was avoided through flood discharge scheduling.
2. Emergency organization system architecture
- Command organization: Led by local government, coordinated by water conservancy departments
- Expert group: composed of hydraulic engineering, geology, hydrology and other professionals
- Rescue team: including engineering rescue and personnel rescue systems
Note: It should be seamlessly connected with the local government emergency management system, and the responsible parties in each link should be clearly defined.
3. Key technical requirements
3.1 Dam failure analysis
The gradual failure model (such as BREACH) is used for earth-rock dams, and the instantaneous failure model is used for concrete dams. Need to calculate:
- Breach flow (simplified formula or hydraulic model)
- Flood evolution parameters (MIKE, HEC-RAS and other software)
- Inundation range (based on 1:10000 topographic map)
3.2 Estimation of life loss
The Li-Zhou method is recommended, considering four key factors:
| Population at risk (PAR) | Static/dynamic statistical method |
| Flood severity (Sf) | Dv=water depth×flow velocity classification |
| Alarm time (WT) | ≥1 hour is sufficient warning |
| Public awareness (Uf) | Clear/fuzzy |
Implementation suggestions
1. Preparation process optimization
Use FMEA/FMECA analysis method to identify key risk points, and give priority to damage modes with hazard index>15.
2. Dynamic management mechanism
It is recommended to revise the plan every three years and update it immediately in the following situations:
- After the project is de-risked and reinforced
- Major changes in downstream population distribution
- Update of emergency technical standards
3. Drill points
Carry out at different levels:
- Desktop exercise (once a year)
- Special exercises (such as personnel transfer)
- Comprehensive exercise (once every three years)
Appendix Application Guide
Appendix D provides a detailed parameter table for estimating the loss of life in dam break, with the lower limit taken on sunny days in summer and the upper limit taken on rainy nights in winter.
Appendix F The social environmental impact index (TSE) needs to be evaluated mainly:
- Urban coefficient (county town=5, prefecture-level city=10)
- Cultural relics (provincial level=5, national level=10)
- Polluting enterprises (medium-sized=5, large-sized=10)
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
SL 275-2001 in English
Field test methods for nuclear density-moisture gauges
2002-01-28 -
SL 319-2018 in English
Design specification for concrete gravity dams
2018-07-17 -
SL 19-2001 in English
Compilation rules of final account for completion of water capital construction project
2001-02-08
