Author(s): Suvashree Das; Mery Biswas
Linked Author(s):
Keywords: Complex system; Tectonics; Remote sensing; Debris flow
Abstract: Abstract. The Kameng watershed located in the westernmost side of the Arunachal Himalaya represents a highly complex and dynamic mountain watershed system. In this region, the geomorphic processes are affected by active tectonics, which results in the watershed’s hydrological response in a complex manner. This study integrates remote sensing-based morphometric and hypsometric analysis to identify spatial patterns of tectonic induced deformation and their effects on the sub-watershed’s behaviour. The earthquake forecasting model has been used for calculating return periods to understand the long-term effect of complex mountain water systems. The results of Multi Criteria Decision Making (MCDM) model and hypsometric analysis reveal pronounced tectonic instability in the north-western side of the Kameng watershed. Hypsometric trends confirm higher uplift in the Tethyan and Greater Himalayan segments, especially those areas traversed by the Main Central Thrust (MCT) and South Tibetan Detachment System (STDS). Geomorphic and seismic analysis together provide a comprehensive understanding of the coupled tectonic-hydrological evolution of the Kameng watershed. This work highlights the importance for regional hazard assessment and sustainable water-system management.
Year: 2026