Bathymetry and Hydrographic Surveys
The phrase 'Water is life' is oft-repeated, and it is a fact that we need to conserve water for future generations. Monarch specializes in bathymetry surveys to measure water depths and profile the bed topography of rivers, lakes, reservoirs, estuaries, and coastal zones. Such surveys are vital for bridge and jetty construction, harbour and port development, inland waterways, dredging, flood modelling, reservoir sedimentation studies, and river training works.
Monarch offers a comprehensive range of bathymetric survey services that accurately map and analyse underwater terrain, supporting a wide range of infrastructure, environmental, and hydraulic projects. We employ advanced hydrographic technologies such as Single Beam Echo Sounders (SBES), Multi Beam Echo Sounders (MBES), and Side-Scan Sonar, along with RTK-GPS/GNSS for high-accuracy geolocation.
Monarch’s bathymetric teams chart riverbeds, reservoirs, estuaries, and coastal waters, so designers know exactly how deep, wide, and stable their waterways are before they commit to dredging, piling, or shoreline protection.
Our surveys integrate bathymetric data with aerial LiDAR, topographic surveys, and GIS-based land data to create comprehensive terrain models for both underwater and terrestrial zones. These models are utilized in hydraulic simulations, enabling detailed analyses of flow patterns, flood risks, and sediment transport. For infrastructure such as creek bridges, causeways, and intake/outlet structures, we assess scour, sediment accumulation, and channel stability.
Data processing is accomplished using software, which delivers depth contour maps, 3D bathymetric models, cross-sections, and profiles according to established standards. Our experienced team ensures high-quality outputs recognized for safety, precision, and regulatory compliance.
Where our surveys add value:
Ports, Jetties & Sea Links – berth pockets, navigation channels, scour checks
Coastal-Protection Works – tetrapod and groyne layouts, erosion baselines
Rivers & Inland Waterways – dredging volumes, bridge pier foundations, flood studies
Reservoirs & Dams – storage recalculation, siltation mapping, intake alignment
Urban Drainage & Outfalls – estuary cross sections, discharge dispersion inputs
Hydro-power & Irrigation – tailrace, headrace and diversion tunnel interfaces
How we deliver:
Field crews synchronise differential - GPS positioning with multi frequency soundings and above water LiDAR or drone photogrammetry, fusing the data in a cloud workflow that auto-flags gaps and outliers. QA routines align overlapping swaths to centimetre tolerances; AI classifiers extract breaklines, shoals and sediment types; and open-format outputs flow straight into hydraulic models, dredge-management systems and BIM environments.
Why Monarch has the edge:
Bathymetry, topography, and hydrology are integrated under one roof, so a channel-alignment tweak therefore instantly updates cross sections, dredge quantities, and scour checks. Our integrated workflow has delivered Stage-I clearances for coastal projects without a single regulatory query, and certificates from state harbour and water-resources departments confirm data consistency across 120 km² of mixed tidal and fluvial terrain.
Representative projects:
Mumbai Metropolitan Region Hydrometric Investigation (12 000 km²) – combined bathymetric topographic survey of rivers, creeks and nallas feeding the Mithi & Ulhas catchments, completed on schedule.
Anti-Sea-Erosion Bund, Murugwada – Mirya, Ratnagiri – detailed bathymetry underpinning tetrapod and groyne design for a 3.4 km shoreline protection scheme.
Passenger-Jetty Development, Andhra Pradesh Tourism (APTDC) – bathymetric surveys and tidal observations at five coastal sites to support jetty layout and CWPRS hydraulic modelling.
Monarch’s bathymetric insight turns unseen depths into clear engineering intelligence keeping coastal, river and reservoir projects safe, compliant and on budget.