Page - 1311 - in Book of Full Papers - Symposium Hydro Engineering

REFERENCES [1] Dunnicliff, John (1988). Geotechnical Instrumentation for monitoring field performance, A Wiley-Interscience publication, USA, pp 199-292; 417- 435. [2] Website of Dam Rehabilitation and Improvement Project: https://www.damsafety.in SUMMARY For control and mitigation of disastrous consequences caused by the failure of an ageing dam, it is essential not only to take preemptive corrective action at the site by strengthening and rehabilitating it but also by implementing a good monitoring and forewarning system. The latter is vital for identification of hazardous conditions or developments well before a catastrophic failure takes place and alert personnel with authority to take remedial measures as early as possible. This paper describes advanced instrumentation for dam safety monitoring comprising of field-proven and rugged geotechnical instruments, advanced automatic surveying techniques and public cloud-based web database management system. The field sensors for measuring parameters such as surface and subsurface deformations, porewater pressure, anchor load, rainfall etc. are connected to the field dataloggers either through an SDI-12 bus or through RF signals thus minimizing the cabling costs and increasing system's reliability. Deployment of the robotic total station to automatically monitor 3D prisms at critical locations adds to the comprehensiveness of the data collected and system's integrity. The data collected by the field instruments and sensors, transmitted using GSM/GPRS network, is readily available in real time to the different stakeholders, who may be located in any part of the world. Automatic notification of alarm conditions through e-mail or SMS is realized by the system. The dam safety monitoring network is cost-effective and value-wise is just a small fraction of what is spent later on in repair and rehabilitation. RÉSUMÉ Pour maîtriser et atténuer les conséquences désastreuses de la défaillance d'un barrage vieillissant, il est essentiel non seulement de prendre des mesures 1311