Furthering the project for the introduction of bullet trains, the National High-Speed Rail Corporation Limited (NHSRCL) on Friday initiated an aerial LiDAR inspection for Mumbai-Nagpur High-Speed Rail Corridor. Being conducted on the proposed stretch of 736 Km, the aerial study shall aid in the preparation of the detailed project report, as stated by sources. The expected corridor will connect Mumbai to towns like Nagpur, Khapri Deport, Karanjalad, Shirdi, Nashik, Igatpuri and Shahapur amongst other places.
Advanced technology to collect all necessary data in 3-4 months
As per reports, the representative from NHSRCL, Sushma Gaur asserted that the examination is being held with the help of an aeroplane that is equipped with advanced LiDAR and imagery sensors. On Friday, the aircraft undertook its first flight and collected information and data related to the ground inspection.
Being deployed by NHSRCL, the latest light detection and ranging survey (LiDAR) technology will collect and record all the necessary data within 3 to 4 months. This is almost one-third of the 11-12 months usually taken for conducting an inspection of the same scale. The NHSRCL is in the process of filing DPRs for seven high-speed rail corridors and the LiDAR technique is the best alternative for the study.
Flight parameters, laser and GPS data & much more!
The NHSRCL spokesperson was quoted as saying, "During the aerial LiDAR survey, 150m of area around the proposed alignment is being captured for the survey purpose. After the collection of data, three dimensional (3D) topographical maps of the corridor of the proposed alignment on a scale of 1:2500 will be available for designing the vertical and horizontal alignment, structures, location of the stations and depots, land requirement for the corridor, identification of project affected plots/structures, right of way etc."
She further added that the ground inspection shall help in the linear infrastructure project by providing accurate details of areas around the alignment. The new technology amalgamates laser data, GPS data, flight parameters and actual photographs to provide exact and efficient information via the survey. In order to provide clear and enhanced pictures of the structures, examine the flora and other minute ground details, the LiDAR survey has put to use 100-megapixel cameras.
Seven high-speed rail corridors proposed across the country
The ambitious High-Speed Rail Corridor is currently proposed for 7 routes. As per reports, the current proposals include Delhi-Noida-Agra-Kanpur-Lucknow-Varanasi, Delhi-Jaipur-Udaipur-Ahmedabad, Mumbai-Nasik-Nagpur, Mumbai-Pune-Hyderabad, Chennai-Bangalore-Mysore, Delhi-Chandigarh-Ludhiana-Jalandhar-Amritsar and Varanasi-Patna-Howrah.
It is to be noted that the final decision for sanctioning the HSR projects depends on the details incorporated in the DPR. This covers techno-economic viability, availability of resources and financing options. Once the details are finalised, the government intends to start the project based on the public-private partnership model.