Surveys & Investigations
Delivering field-based surveys and technical investigations that generate the ground-truth data behind sound engineering and planning decisions spanning topographic survey, bathymetric survey, drone-based LiDAR survey, hydrological monitoring, sediment monitoring, and geological and geotechnical explorations, alongside enumeration, baseline, and participatory surveys that capture socio-economic and community-level data for project design and impact assessment.
Topographic Surveys
High-precision topographic data acquisition using total station, GNSS, drone photogrammetry and terrestrial LiDAR- producing DEMs, contour maps and engineering survey outputs for infrastructure design, floodplain mapping and terrain analysis across mountain, hill and river corridor environments.
DEM/ DTMTotal stationGNSSEngineering surveyTerrain analysisCheck surveyControl point network
View Projects Bathymetric Survey
High-resolution riverbed and lake bottom mapping using single-beam and multi-beam echo sounders combined with GNSS positioning — producing bathymetric charts, channel cross-sections and sediment volume data for hydropower intakes, reservoir sedimentation studies and river navigation planning.
Echo-sounder3D modellingRiver-bed mappingReservoir sedimentationADCPChannel cross-section
View Projects Aerial Survey (Drone & LiDAR)
Acquiring ultra-high-resolution 3D point cloud data and digital terrain models using drone-mounted LiDAR and photogrammetric systems- enabling precise bare-earth surface modelling, vegetation canopy analysis and change detection for flood mapping, infrastructure survey and natural resource assessment across complex terrain.
Drone LiDARPoint cloudDTM/DSMPhotogrammetryUAC surveyProject planningChange detectionHazard analysis
View Projects Hydrological Monitoring
Designing, installing and operating hydrological monitoring networks for rivers, lakes, glaciers and springs- measuring water levels, discharge, sediment concentration and snow conditions through field campaigns and automated telemetry stations, generating the long-term datasets that underpin water resource planning and early warning systems.
Stream gaugeDischarge measurementReal-time observationPeak-flowRating curveWater level
View Projects Sediment Monitoring
Characterising suspended sediment loads, bedload transport rates and sedimentation patterns in Himalayan rivers and reservoirs- combining field sampling, laboratory analysis and acoustic measurement methods to quantify sediment budgets for hydropower design, reservoir management and river morphology studies.
Suspended sedimentBed loadReservoir trap efficiencyTurbiditySediment budgetHimalayan rivers
View Projects Geological & Geotechnical Explorations
Conducting surface and subsurface geological and geotechnical investigations for infrastructure siting, slope stability assessment and foundation design- combining engineering geology mapping, borehole drilling, in-situ testing and laboratory analysis to characterise ground conditions for informed engineering decisions in complex mountain geology.
Engineering geologyRock mechanicsSlope stabilityGeological mappingCore-drillingGeo-hazard assessment
View Projects Enumeration & Baseline Surveys
Conducting systematic quantitative enumeration surveys and household-level baseline data collection for infrastructure projects, livelihood programmes and environmental assessments using structured questionnaires, GPS-tagged asset inventories and statistical sampling to generate reliable baseline datasets for project design and evaluation.
Household surveyAsset inventoryPrimary dataSocio-economic baselineGPS inventoryCAPI tools
View Projects Participatory Surveys
Facilitating community-centred data collection and participatory mapping processes that integrate local knowledge with technical survey methods- generating community risk maps, resource inventories and hazard perception data that enhance technical assessments and strengthen community ownership of DRR and development planning outcomes.
Community mappingLocal knowledgeFGDs/ KIIsCommunity engagementRisk mapping
View Projects Interested in Surveys & Investigations?
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info@ies.com.np · +977-1-5269776