Morphotectonic analysis of the Sali River basin, Bankura district, West Bengal

Das, Sujit; Gupta, Krishnendu

doi:10.1007/s12517-019-4406-0

Cited by 12 publications

(2 citation statements)

References 42 publications

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“…Elongation Ratio is designated as the ratio of the diameter of a circle of the same area of the basin to the maximum basin length (Bull and McFadden 1977;Das and Gupta 2019). Higher values indicate low relief while high elevation with steep gradient is associated with lower values (Alizadeh et al 2018).…”

Section: Basin Elongation Ratio (Re)mentioning

confidence: 99%

Lithological and tectonic response on catchment characteristics of Rishi Khola, Sikkim, India

Saha

Neogy²,

Kar

et al. 2021

J. Mt. Sci.

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Rishi Khola, a sub-watershed of Teesta river, traverses along the Main Central Thrust (MCT) with a multitude of litho units and structural entities. This study examines the impact of tectonic and lithologic controls in configuring the catchment characteristics of Rishi Khola, Sikkim, India. Corrected SRTM 30 m DEM and Landsat 8 satellite image have been used for extracting the river network, preparing the sub-catchments, the longitudinal profile and thereby calculating the morphotectonic indices. An aggregated tectonic index (ATI) has been prepared to map the intensity of tectonic perturbations in the fluvial environment using the entropy weightage method (EWM) and Weighted Linear Combination (WLC). The undulating nature of the longitudinal profile with prominent knick points confirms the presence of tectonic disturbances and lithological variations. From all the computed morphotectonic indices and the ATI, it has been evident that the region has experienced surface deformations. When viewed at the entire catchment, the morphotectonic indices suggest ample responses to the tectonic perturbations due to the dominance of lithology-controlled hill slope processes and fluvial erosion. The spatiality of the tectonic sensitiveness is rather concentrated into certain pockets of differential stress field formed due to fault thrusting of the Himalayas. The study chiefly focuses on the peculiarity of the watershed which displays a complex response of tectonic and rock structure; wherein the proposed methodology has been successful in excavating such complex responses around the Himalayan thrusts.

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Section: Basin Elongation Ratio (Re)mentioning

confidence: 99%

Lithological and tectonic response on catchment characteristics of Rishi Khola, Sikkim, India

Saha

Neogy²,

Kar

et al. 2021

J. Mt. Sci.

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“…The preexisting drainage networks and consequently the drainage basin is very much sensitive, and are the rst element that responds to sudden geomorphic change, resulting from ongoing tectonic activities (Goldsworthy & Jackson, 2000, Queiroz et al, 2015. The evolution of geomorphic architecture resulting from neotectonic activities in a region can also be effectively assessed through the morphotectonic analysis (Das and Gupta, 2019). Nowadays, the GIS technologies in association with eld investigations have the potential to provide synoptic view and multi-temporal data of a drainage basin (Rai et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Impact of geomorphometric parameters on landslide occurrence and distribution in Yamuna River Basin, North-Western Himalaya, India

Shankar

Satyam

Singh

et al. 2021

Preprint

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Landscape evolution is a dynamic process controlled by several geomorphic parameters along with geology, tectonics and climatic condition of the area. The Himalayan mountain belt is highly geodynamic with immature topography which offer one of the best places to study the impact of geomorphotectonic characteristics on the occurrence and distribution of landslides along with tectonically modified geomorphic features. The morphotectonic study of the drainage basin is extensively utilized to analyze the landscape evolution in the study area along with impact of neotectonic activity in landscape evolution. The study shows that the Yamuna River, originating from the mighty Himalayas, flows downslope by adjusting its course due to ongoing tectonic activities, underlying structures, and climatic factors. Active tectonics play important role in modifying the landscape and impacting the occurrence and distribution of landslides. The characteristics of rainfall induced landslides have been studied in relation to morphotectonic parameters. The analysis shows that the probability density of landslides was highest in the range of 25o-30o and that landslide size increased up to 20o-25o slope angle, decreasing on further increase in slope angle. The study also shows that slope angle merely controls number of landslides rather than size of the landslides. Landslides were mostly restricted to South facing slopes. About 91% of the landslide occur in the drainage density range of 1.2 to 2.1 km/km2 while landslides show very low occurrence in either lower (< 1.2) or higher (> 2.1) drainage density. The present analysis can be very helpful in landslide risk reduction and landslide hazard zonation and probably to plan critical locations for installation of early warning signals.

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Tectonic and Morphotectonic Studies of Alluvial Fans

Pourmorad

Mohanty²

2022

Alluvial Fans in Southern Iran

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Morphotectonic analysis of the Sali River basin, Bankura district, West Bengal

Cited by 12 publications

References 42 publications

Lithological and tectonic response on catchment characteristics of Rishi Khola, Sikkim, India

Lithological and tectonic response on catchment characteristics of Rishi Khola, Sikkim, India

Impact of geomorphometric parameters on landslide occurrence and distribution in Yamuna River Basin, North-Western Himalaya, India

Tectonic and Morphotectonic Studies of Alluvial Fans

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