Dam safety & Safety Devices - Vivek Kapadia

1. DAM SAFETY AND SAFETY DEVICES VIVEK P. KAPADIA Sardar Sarovar Narmada Nigam Limited

2. Components of Dam Earthen Dam with Ungated Spillway

3. Components of Dam Dam with Power House

4. Components of Dam Gravity Dam

5. Components of Dam Earthen Dam with Gated Spillway

6. Components of Dam Buttress Dam

8. Structure of Dam Surveillance System Level Responsibility Activities Reports 1 Owner (dam safety engineer, technical staff) Regular inspection of condition (by visual observations) and behaviour (by measurements). Tests of spillway and bottom outlet gates. Monitoring records and test protocols 2 Experienced engineer (civil engineer) Analysis of the measured data and observations. Annual inspection of the dam. Yearly report on condition and on measured behaviour. 3 Experts (civil engineer and geologist) Inspection and appraisal of the dam safety every five years. Report on condition and long-term behaviour. Analysis of special safety related questions. 4 Dam Safety Authority On-site inspection. Review of the annual reports and the expert’s appraisal. Verification of the implementation of the necessary measures. Interventions if measures have to be implemented.

15. Definition of danger levels of flood waves (h: water depth; v: flow velocity) Danger levels and intensity of flooding Dam safety regulations apply if danger levels are exceeded High danger h > 2 m or v·h > 2 m 2 /sec People inside massive buildings, in railway coaches, in passenger cars, or on camping sites are in danger. Medium danger 2 m ≥ h > 1 m or 2 m 2 /sec ≥ v·h > 1 m 2 /sec People inside buildings, in passenger cars or on camping sites are in danger. Moderate danger 1 m ≥ h > 0.5 m or 1 m 2 /sec ≥ v·h > 0.5 m 2 /sec People in passenger cars and on camping sites are in danger. Low danger h ≤ 0.5 m or v·h ≤ 0.5 m 2 /sec The regulations do not apply.

17. Common Maintenance Items

19. Piezometers

20. Piezometers

28. Inclinometer

36. Automated Data Acquisition System

44. THANKS TO ALL