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1st Int. Transborder Conf. of the Timor Island: Timor %u2013 Science without borderDili, 7-8 May 2025174Assessment of Hydro-Geomorphological Processes Using Remote Sensing and Sedimentation Rate Measurements, Hera Sub-Basin Watershed, Dili- Timor LesteOsvaldo da Cruz Sarmento1*, Benjamin H. Martins2, Apolinario E. Alves1and Gabriel G. de Oliveira11 Geology and Petroleum Department, National University of Timor Lorosa%u2019e, Timor Leste2 Civil Engineering Department, National University of Timor Lorosa%u2019e, Timor Leste*Corresponding author: osvaldosarmento1512@gmail.comAbstractHydro-geomorphological processes play a crucial role in shaping landforms and influencing sediment transport, erosion, and watershed dynamics. This study assesses these processes in the Hera Sub-Basin Watershed using remote sensing techniques, Electrical Resistivity Tomography (ERT), and sedimentation rate measurements. By integrating satellite imagery analysis, digital elevation models (DEM), and field-based sediment sampling, we evaluate key geomorphological changes, hydrological dynamics, and subsurface geological conditions within the watershed. The methodology includes GIS-based terrain analysis, land cover classification, GNSS surveys, and ERT to quantify sediment deposition, identify erosion-prone areas, and analyze sediment transport patterns. The results reveal spatial variations in sedimentation rates, the impact of hydrological processes on landscape stability, and the influence of anthropogenic activities on watershed geomorphology. Findings from this study provide critical insights for sustainable watershed management, erosion control strategies, flood risk assessments, river dynamics, and environmental planning in Timor-Leste%u2019s vulnerable catchment areas. The integration of remote sensing and in-situ measurements significantly enhances the understanding of sediment dynamics, offering a valuable framework for future hydro-geomorphological assessments in similar environments.Keywords: Hydro-geomorphological, Remote sensing, Sedimentation rate measurements.