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Quaternary alluvial fan dynamics of the Jaldhaka basin

Journal of Mountain Science 2022年第8期19卷 2160-2179页

作者： Adrija RAHA Mery BISWAS Department of Geography Presidency University86/1 College StreetKolkata-700073West BengalIndia

Across the Himalayan foreland area,alluvial fans respond to fluvial depositional landforms created by active tectonics and are incorporated within hydro-sediment *** tributary of the master stream has its water and sediment to discharge,which assists in initiating several mesolevel fans in response to the active tectonics in Jaldhaka *** the mountain front,active MBT(Main Boundary Thrust),MFT(Main Frontal Thrust)and lineaments(parallel and transverse to Himalaya)have governed the tectonically active Quaternary foreland area where numerous meso-level fans have *** study aims to estimate the tectonic activeness of each meso-fan using the morphotectonic *** tributaries of the Jaldhaka River are permuted to the recent tectonism or neotectonics to form each meso fan with its basin displaying the varying degree of their activeness and aggradation *** methods like technique for order performance by similarity to ideal solution(TOPSIS)and VIKOR(Vlse Kriterijumska Optimizacija Kompromisno Resenje)that specify multicriteria optimization and compromise solution,in Serbian have ranked the fan 2 as mostly active and fan 4 is comparatively tectonically *** hydro-sediment characteristics reveal the topographic spatial dynamics of fan 4 where lobe 3 has elevated from *** XRD analysis specifies the scientific key in response to the dominance of dolomite in the aggraded elevated bed sediments carried by the Rohtikhola *** conceptual fan models of fan 2and 4 display the fan development phases through four *** has clearly defined the extension of the fan lobes of fan 2 and *** is summarized that within a common climatic zone and similar neo-tectonic setting,meso-level fans have differential morphotectonic signatures with dynamic aggradation processes.

关键词： Himalaya Tectonic activeness fan dynamics Hydro sediment interaction

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