HSSPL maps what lies beneath — reservoir beds, river channels and barrage ponds — using single-beam and multi-beam echo sounders with RTK-DGPS positioning. From the Chamera-I reservoir for NHPC to the Pashulok Barrage for IIT Roorkee, we deliver the capacity curves, sedimentation volumes and bed contour charts that dam operators and engineers build decisions on.
Gross and live storage assessment, capacity-elevation and area-elevation curves, and sediment volume computation against original survey data — the core inputs for dam operation and life assessment.
River cross-sections and longitudinal sections for hydropower intakes, barrages, bridges, flood studies and sediment replenishment analysis — including fast-flowing Himalayan reaches.
Bed-level mapping near dam toes, intake structures and tailraces; pre-feasibility bathymetry for pumped-storage and new hydro projects.
Reservoir bathymetry surveys for capacity and sedimentation assessment of two operating NHPC hydropower reservoirs.
Reservoir capacity survey of the Pashulok Barrage pond near Rishikesh for the Indian Institute of Technology Roorkee.
River bathymetry and cross-sections supporting a sediment replenishment study of the Subarnarekha river.
A bathymetric survey maps the underwater bed of a reservoir, river or lake using echo sounders positioned by DGPS. The output is a bed-level contour chart, capacity-elevation curve or sedimentation estimate used by dam operators, engineers and researchers.
With RTK-corrected DGPS positioning and a calibrated echo sounder, horizontal accuracy of ±5 cm is achievable, with depth accuracy of roughly 0.1% of depth plus sensor tolerance. Every HSSPL survey is checked against established ground control before handover.
A small barrage pond can be sounded in 2–4 days; a large hydropower reservoir typically takes 2–4 weeks including mobilisation, control establishment, sounding runs and processing — depending on area, access and weather window.
Bed-level contour charts, capacity-elevation and area-elevation curves, sediment volume computation, river cross-sections and L-sections, GIS-ready shapefiles, CAD drawings (DWG/DXF) and a survey report with control-point records and accuracy statement.
Yes — this is our specialty. Our crews mobilise inflatable vessels and echo sounders to remote, high-altitude sites with limited road access, where conventional survey boats cannot be transported.
Tell us the site and the question you need answered — a surveyor will respond with a method, timeline and quote within one working day.
Get a survey quote Call +91 88947 33124