Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. XIV
Written by Simion BRUMA, Catalin-Stefanel SABOU, Ioana POP, Florica MATEI, Paul SESTRAS, Mircea NAP, Elemer-Emanuel SUBA, Tudor SALAGEAN
The comprehensive mapping and inspection of both underground and above-ground terrain in mountainous environments pose significant challenges for engineering projects, particularly those involving legacy infrastructure. This study presents an integrated geospatial methodology for the rehabilitation and modernization of the Tomesti micro-hydropower station in Timiș County, Romania. By combining GNSS-based control networks, UAV photogrammetry, airborne LiDAR, and handheld SLAM scanning, the project achieved high-resolution data acquisition across complex topographies and inaccessible subsurface structures. Ground control points were established using total stations to ensure millimetric precision and consistent georeferencing of all datasets. The workflow delivered orthophotos, digital surface and terrain models, detailed topographic plans, and 3D reconstructions of the interior hydro-technical gallery. These outputs formed the foundation for updated technical documentation and supported engineering analyses for structural rehabilitation and eco-friendly water intake systems. The results confirm that modern geomatics, when anchored in classical surveying practices, provides a robust framework for accurate assessment, design, and environmental integration. This case study underscores the value of multi-sensor approaches in repurposing abandoned infrastructure for sustainable energy production and demonstrates their practical relevance in mountainous terrain.
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