Contrasting characteristics of a Himalaya- and a Shillong Plateau-fed basin in the Brahmaputra catchment, Bhutan and India: A study in tectonic geomorphology.
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| Title: | Contrasting characteristics of a Himalaya- and a Shillong Plateau-fed basin in the Brahmaputra catchment, Bhutan and India: A study in tectonic geomorphology. |
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| Authors: | Roy, Shayani1 (AUTHOR) shayani.rs2020@earth.iiests.ac.in, Saha, Saptarshi1 (AUTHOR) saptarshisaharishi@gmail.com, Bandyopadhyay, Sunando2 (AUTHOR) sunando@live.com, Mukhopadhyay, Ananya1 (AUTHOR) annie.earth@faculty.iiests.ac.in |
| Source: | Environmental Earth Sciences. May2026, Vol. 85 Issue 9, p1-23. 23p. |
| Subject Terms: | *Morphotectonics, *Neotectonics, *Watersheds, *Geophysical observations, *Uplands, *Rapids |
| Geographic Terms: | Himalaya Mountains, Bhutan, India, Brahmaputra River |
| Abstract: | Rivers leave distinct imprints on the landscape as they respond to tectonic, structural, and climatic changes over time. A river basin is likely to be shaped by active tectonic movements, which can be unravelled with the help of geomorphic analyses of historical maps, images and elevation models, employing statistical and cartographic techniques. The area selected for this work includes the 2404-km² Dhansiri (North) Basin on the northern bank and the 1440-km² Digaru Basin on the diagonally opposite southern bank of the Brahmaputra River. They drain the southern Himalaya and the northern fringes of the Shilong Plateau, respectively. This study correlates the role of neotectonics on the river basin with channel planform changes. Besides this, seven morphotectonic indices – asymmetry factor, hypsometric integral, transverse topographic symmetry factor, valley floor height to valley width ratio, river profile analysis, stream-length gradient index, and sinuosity index – are explored for insights on the imprints of tectonic activity. Field verification of selected channel reaches are also made. The findings indicate that the northern Himalayan foreland basin exhibits greater tectonic activity than the southern plateau-fringe basin. Furthermore, they reveal that the two basins are different from each other in terms of their tectonic oddity and dynamic channel character. The basins hold regional significance, influencing environmental processes through tectonic interactions, sediment fluxes, and associated disaster risks. Understanding their dynamics provides insights for regional hazard mitigation, climate adaptation, and sustainable development planning within the broader context of changing environmental conditions. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 194200232 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Contrasting characteristics of a Himalaya- and a Shillong Plateau-fed basin in the Brahmaputra catchment, Bhutan and India: A study in tectonic geomorphology. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Roy%2C+Shayani%22">Roy, Shayani</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> shayani.rs2020@earth.iiests.ac.in</i><br /><searchLink fieldCode="AR" term="%22Saha%2C+Saptarshi%22">Saha, Saptarshi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> saptarshisaharishi@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Bandyopadhyay%2C+Sunando%22">Bandyopadhyay, Sunando</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> sunando@live.com</i><br /><searchLink fieldCode="AR" term="%22Mukhopadhyay%2C+Ananya%22">Mukhopadhyay, Ananya</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> annie.earth@faculty.iiests.ac.in</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Environmental+Earth+Sciences%22">Environmental Earth Sciences</searchLink>. May2026, Vol. 85 Issue 9, p1-23. 23p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Morphotectonics%22">Morphotectonics</searchLink><br />*<searchLink fieldCode="DE" term="%22Neotectonics%22">Neotectonics</searchLink><br />*<searchLink fieldCode="DE" term="%22Watersheds%22">Watersheds</searchLink><br />*<searchLink fieldCode="DE" term="%22Geophysical+observations%22">Geophysical observations</searchLink><br />*<searchLink fieldCode="DE" term="%22Uplands%22">Uplands</searchLink><br />*<searchLink fieldCode="DE" term="%22Rapids%22">Rapids</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Himalaya+Mountains%22">Himalaya Mountains</searchLink><br /><searchLink fieldCode="DE" term="%22Bhutan%22">Bhutan</searchLink><br /><searchLink fieldCode="DE" term="%22India%22">India</searchLink><br /><searchLink fieldCode="DE" term="%22Brahmaputra+River%22">Brahmaputra River</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Rivers leave distinct imprints on the landscape as they respond to tectonic, structural, and climatic changes over time. A river basin is likely to be shaped by active tectonic movements, which can be unravelled with the help of geomorphic analyses of historical maps, images and elevation models, employing statistical and cartographic techniques. The area selected for this work includes the 2404-km² Dhansiri (North) Basin on the northern bank and the 1440-km² Digaru Basin on the diagonally opposite southern bank of the Brahmaputra River. They drain the southern Himalaya and the northern fringes of the Shilong Plateau, respectively. This study correlates the role of neotectonics on the river basin with channel planform changes. Besides this, seven morphotectonic indices – asymmetry factor, hypsometric integral, transverse topographic symmetry factor, valley floor height to valley width ratio, river profile analysis, stream-length gradient index, and sinuosity index – are explored for insights on the imprints of tectonic activity. Field verification of selected channel reaches are also made. The findings indicate that the northern Himalayan foreland basin exhibits greater tectonic activity than the southern plateau-fringe basin. Furthermore, they reveal that the two basins are different from each other in terms of their tectonic oddity and dynamic channel character. The basins hold regional significance, influencing environmental processes through tectonic interactions, sediment fluxes, and associated disaster risks. Understanding their dynamics provides insights for regional hazard mitigation, climate adaptation, and sustainable development planning within the broader context of changing environmental conditions. [ABSTRACT FROM AUTHOR] |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s12665-026-12862-z Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 23 StartPage: 1 Subjects: – SubjectFull: Morphotectonics Type: general – SubjectFull: Neotectonics Type: general – SubjectFull: Watersheds Type: general – SubjectFull: Geophysical observations Type: general – SubjectFull: Uplands Type: general – SubjectFull: Rapids Type: general – SubjectFull: Himalaya Mountains Type: general – SubjectFull: Bhutan Type: general – SubjectFull: India Type: general – SubjectFull: Brahmaputra River Type: general Titles: – TitleFull: Contrasting characteristics of a Himalaya- and a Shillong Plateau-fed basin in the Brahmaputra catchment, Bhutan and India: A study in tectonic geomorphology. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Roy, Shayani – PersonEntity: Name: NameFull: Saha, Saptarshi – PersonEntity: Name: NameFull: Bandyopadhyay, Sunando – PersonEntity: Name: NameFull: Mukhopadhyay, Ananya IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 18666280 Numbering: – Type: volume Value: 85 – Type: issue Value: 9 Titles: – TitleFull: Environmental Earth Sciences Type: main |
| ResultId | 1 |
