Geomorphic signatures in relation to seismo-tectonic studies of Kameng watershed, NE Himalaya
Catena, cilt.271, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 271
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.catena.2026.110251
- Dergi Adı: Catena
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Artic & Antarctic Regions, BIOSIS, Environment Index, Geobase, Academic Search Ultimate (EBSCO)
- Anahtar Kelimeler: Dendrogram, Frequency-magnitude distribution (FMD), Radial expansion model, RDEs/RDEt index, Space-Time-Depth-Magnitude (STDM) analysis
- Karadeniz Teknik Üniversitesi Adresli: Evet
Özet
The tectonic dynamics of the north-eastern Arunachal Himalayas, particularly in relation to the Radial expansion model, present a complex interplay of geomorphological processes. The Kameng watershed, situated in the Arunachal Himalayas, is a tectonically active region characterized by frequent seismic events and intricate geomorphic processes, influenced by its unique geographical position and association with the Radial expansion model. The primary focus is to analyze morphometric parameters, indices, and earthquake data to identify sub-watersheds with significant tectonic activity. Datasets presented here include morphometric analysis (RDEs/RDEt index, and dendrogrm), and seismo-tectonic analysis using the Gutenberg-Richter relationship, and Space-Time Depth Magnitude (STDM). Results indicate pronounced tectonic instability in the North-western sub-watersheds (SW-9, SW-10, and SW-16), characterized by higher seismic activity, concentration of knickpoints, straight channels, and incised meanders and debris flow. These findings suggest that the heightened tectonic activity is not coincidental but is likely linked to the radial expansion model, with ongoing stress accommodation along the STDS and MCT in the hinterland. In contrast, the eastern side of the Kameng watershed exhibits lower seismic activity and reduced tectonic instability, possibly associated with the Assam Gap, where the stress release rate is relatively low compared to the Eastern Himalayan Collision Zone to the north and the Shillong Plateau to the southwest. This study enhances understanding of tectonic-seismic dynamics in the Kameng watershed and argues for the necessity of detailed research in the region, along with preparedness measures to mitigate potential future hazards.