Telangana Launches Aerial Survey for Srisailam Canal Completion

Chief Minister A Revanth Reddy recently led an inspection of the aerial electromagnetic survey initiated for the Srisailam Left Bank Canal (SLBC) project. Accompanied by Ministers Uttam Kumar Reddy and Komatireddy Venkat Reddy, the team observed the crucial heli-borne magnetic survey designed to collect geological data up to a depth of 1,000 metres. This survey is essential for understanding underground shear zones and water flow patterns, both vital for the effective planning and execution of the SLBC tunnel works.

The survey employs a Canadian-made system called VTEM Plus, operated by the National Geophysical Research Institute (NGRI). The technology involves a large transmitter loop suspended 100–150 feet beneath the helicopter, emitting electromagnetic pulses into the ground. Sensors detect the reflected signals, providing insights into rock structure, water flow, and mineral composition. As the Chief Minister and Ministers observed from their helicopter, the aerial survey flew in parallel with the survey helicopter for several kilometres.

Uttam Reddy stated that Telangana is embracing a new era of science-led irrigation management with this advanced survey method. He emphasized that the precision data gathered would enable the safe completion of the remaining works within a two-year timeframe, ultimately delivering water to millions of residents in the Nalgonda and Mahabubnagar districts.

The three-day survey covers a total alignment of 44 kilometres, with each flight path being meticulously planned and repeated as necessary for verification. The data collected will lead to the creation of detailed three-dimensional maps that will inform engineers about tunnel alignment, reinforcement, and drainage strategies.

Processing of the field data will take place in Hyderabad, where NGRI scientists will utilize specialized software to develop a comprehensive geological model of the SLBC corridor. “The combination of aerial precision and scientific analysis will give a complete picture of subsurface conditions and guarantee the safety of future tunnelling,” Uttam Reddy noted.

To ensure rigorous technical oversight, the government has engaged senior engineers from the Indian Army’s Corps of Engineers. Lt. Gen. Harpal Singh (retired), the former Engineer-in-Chief of the Indian Army, has been appointed as an advisor for the project. Furthermore, Col. Parikshit Mehra, who supervised significant tunnelling projects under the Brahmaputra River and at Rohtang Pass, has been assigned to oversee the execution of the SLBC works.

The integration of advanced technology and expert supervision highlights the government’s commitment to enhancing irrigation infrastructure, promising significant benefits for the region’s agricultural productivity and water management.