Study Area:

The Arun River and its tributaries, located within the Sankhuwasava District, are crucial hydrological systems that play a significant role in local agriculture, hydropower development, and riverine ecosystems. The rugged topography of this region, combined with varying river flow dynamics, presented unique challenges for conducting precise surveys. This project aimed to provide detailed data on the river’s cross-sections and topography, allowing for comprehensive hydrological analysis and future planning for flood control, hydropower, and water resource management.

Using UAV (Unmanned Aerial Vehicle) technology for aerial data acquisition, the project covered expansive river sections and their surrounding landscapes. UAVs were deployed to capture high-resolution images and collect precise geographical data from hard-to-reach areas, especially in the steep valleys and remote parts of the district. This data enabled the generation of accurate topographic maps and hydrological models essential for infrastructure planning and environmental monitoring.

 Deliverables:

– Ortho Photos: Generated high-resolution ortho photos provided detailed imagery, allowing for precise visual interpretation of the project area.

– Contour Maps: Produced contour maps that detailed the area’s elevation changes, aiding in terrain analysis and flood risk assessments.

– Digital Surface Models (DSM): DSMs represented the Earth’s surface, including all natural and man-made features, offering a complete view of the topography.

– Digital Terrain Models (DTM): DTMs highlighted the bare earth surface, excluding vegetation and man-made structures, which was critical for hydrological modeling.

– Topographical Maps: Comprehensive topographical maps that combined all datasets, providing essential tools for engineers, hydrologists, and planners for riverine analysis and management.