Drainage network analysis to understand the morphotectonic significance in upper Tuirial watershed, Aizawl, Mizoram

Barman, Binoy Kumar; Bawri, Gautam Raj; Rao, K. Srinivasa; Singh, Sudhir Kumar; Patel, Deep

doi:10.1016/b978-0-12-812362-1.00017-5

Cited by 8 publications

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“…A morphometric analysis and in particular morphotectonic parameters are more capable of determining the geomorphic, fluvial, and tectonic evolution of the basin (Barman, UdayaBhaskara Rao, et al, 2021; Barman, Bawri, Srinivasa Rao, Singh, & Patel, 2021; Barman, Gagoi, & Srinivasa Rao, 2019; Bhatt, Chopra, & Sharma, 2007; Bhatt, Litoria, & Sharma, 2007; Cuong & Zuchiewicz, 2001; Rakshit, Bezbaruah, & Bharali, 2018; Singh, Maddheshiya, Jha, Tignath, & Singh, 2020). A morphotectonic analysis has been carried out to reconstruct a tectono‐geomorphic history in the study area.…”

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confidence: 99%

Significance of neotectonics in assessing the relative tectonic activity in and around the Mat Fault of Eastern Himalayan Fold Belt, Mizoram,north‐eastIndia

et al. 2022

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The Mat Fault situated in the Eastern Himalayan Fold Belt was mapped around Mizoram and is oriented NNW to SSE. This region has experienced a number of earthquakes in the recent past that damaged settlements and triggered numerous landslides. A set of geomorphic parameters were analysed on both sides of the Mat Fault to understand the tectonic setting. The six geomorphic parameters include: elongation ratio, hypsometric analysis, asymmetry factor, transverse topographic symmetry factor, stream length‐gradient index, and valley floor‐to‐width ratio, and they were calculated for 20 fourth‐order sub‐watersheds. Out of 20 sub‐watersheds, 10 sub‐watersheds were selected from the northern block and 10 from the southern block. Hypsometric analyses show that all the sub‐watersheds have attained a mature stage of geomorphic cycle of erosion; and from the analysis of hypsometric curves, it is found that 16 of the sub‐watersheds might have been uplifted due to tectonic activity. The asymmetry and transverse topographic symmetry factor values also suggest tilting in different directions possibly due to obstruction by faulting. The anomaly of high stream length index values is also observed in different sub‐watersheds indicating neotectonic activity. Low values of the valley floor‐to‐width ratio (<0.5) suggest V‐shaped valley topography, which indicate vertical incision due to tectonic activity. On evaluating relative tectonic activity among 20 sub‐watersheds, it is found that 80% of sub‐watersheds in the northern block show relatively stronger tectonic activity than the southern block. The present work suggests that the study area is tectonically active, and the possibility that they were produced by seismic activity.

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