Seismological and Strong Motion Network Around Tehri Region

Strong Motion Network in Tehri and Koteshwar Dam

Strong Motion instrumentation of dam body is of paramount. Strong Motion instrumentation yields response of the structure and its behaviour during an earthquake. A strong motion instruments network is being operated in Tehri dam, free field and its Power House and Koteshwar dam by THDC. Department of Earthquake Engineering (DEQ), Indian Institute of Technology Roorkee (IITR), is providing guidance as Memorandum Of Understanding (MOU) between the DEQ, IITR and THDC India.

Tehri Dam: 07 SMA Stations

Power House of Tehri Dam: 03 SMA Stations

Koteshwar Dam: 03 SMA Stations

Summary of SMA Deployed in Tehri Dam, Tehri Dam Power House and Koteshwar Dam

Strong Motion Network - Instrumentation

Basalt

Standalone Accelerograph
Bandwidth: DC to 200 Hz
Dynamic Range: 155dB+
4 channel recorders with 24 bit digitizers
Sampling rate 200 samples/sec.

ETNA-2

Standalone Accelerograph
Bandwidth: DC to 200 Hz
Dynamic Range: 155dB+
4 channel recorders with 24 bit digitizers
Sampling rate 200 samples/sec.

Data Acquisition System (DAS)

Granite Digitizer
Channels : 12, 20, 24 or 36
Digitizer: 24 bits
Amplifies, digitizes and filters recorded signal
Sampling rate: 200 samples/sec.

EPI Sensor

24-Hours Emergency Services
FBA ES-T-triaxial Balance Accelerometers
Range: 155dB+; Bandwidth: DC to 200 Hz
Range: ± 0.25g, ± 0.5g, ± 1g, ± 2g, or ± 4g,
Outputs: ± 2.5 V single ended, ± 10 V single ended, ± 5 V differential and ± 20 V differential