Morpho-hypsometric evolution of the Karuvannur River Basin, a tropical river in central Kerala, southwestern peninsular India

Bhadran, Arun; Vijesh, V.K.; Gopinath, Girish; Girishbai, Drishya; Jesiya, N. P.; Thrivikramji, K. P.

doi:10.1007/s12517-018-3794-x

Cited by 11 publications

(5 citation statements)

References 38 publications

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“…High roughness number ( R n ) of the KRB signifies the structural complexity of terrain (Prakash, Singh, & Shukla, 2016; Schumm, 1956). Higher R n and DD values in subwatersheds of the KRB imply hilly regions with a tropical climate and high rainfall (Bhadran et al, 2018). Farhan et al (2015) categorizes ruggedness as subdued (0.1), slight (0.1 to 0.4), moderate (0.4 to 0.7), and sharp (0.7 to 1.0).…”

Section: Resultsmentioning

confidence: 99%

“…The basin still has enough relief for erosional processes of dynamic flow. Inconsistent morphometric values in the KRB are attributable to underlying lithological and deformation features (Bhadran et al, 2018). Morphometric characteristics show that most of the basin, notably the southern and central region consists of complex, highly compacted and impermeable hard rock terrain.…”

Section: Resultsmentioning

confidence: 99%

“…Higher R n and DD values in subwatersheds of the KRB imply hilly regions with a tropical climate and high rainfall (Bhadran et al, 2018). Integrating morphometric and drought susceptibility analyses produce the drought risk map (Figure 10b).…”

Section: Morphometric Analysismentioning

confidence: 99%

“…Topical global drought‐related environmental catastrophes have spurred a thorough examination of river morphology. Understanding rivers requires comprehending the evolution of landforms (Bhadran et al, 2018). Morphometry examines the drainage system and basin's subsurface geology, deformational structures, morphology, and hydrology (Hortan, 1945; Prakash, Singh, & Shukla, 2016; Strahler, 1952).…”

Section: Introductionmentioning

confidence: 99%

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Spatio‐temporal drought susceptibility assessment of Ken River Basin, Central India, and its evaluation through river's morphometry

et al. 2022

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Regular monitoring of drought events, watershed characterization, management, and development efforts is crucial for future disaster predictions and mitigation strategies. The drought susceptibility investigation has been carried out in the Ken River Basin of Bundelkhand region, one of the most drought-prone areas in India. Proxies used in the present study are long-term climatological data (rainfall, standardized precipitation index, and aridity index), satellite data (slope, drainage density [DD], distance to river, and normalized difference vegetation index), lithology, lineament density, and groundwater depth. By the analytical hierarchy process, weightage of each factor is assigned according to its importance. Study shows that nearly 48% of the area of the basin experiences moderate to severe drought conditions. In the last five decades, there have been 22 years of extreme drought, with the most extended period being 1972-1974 and the driest year being 2006-2007. Sensitivity analysis reveals that lithology, slope, and DD are the most significant parameters in the susceptibility analysis. Model validation through an artificial neural network demonstrates the model's high accuracy (0.9) and sensitivity with minor errors. An integrated study of drought susceptibility and morphometry is useful for identifying the drought risk hotspots in the basin. The investigation will be helpful in river basin management and disaster management strategies.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Morphometric Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatio‐temporal drought susceptibility assessment of Ken River Basin, Central India, and its evaluation through river's morphometry

et al. 2022

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“…Ruggedness number (RI) is regarded as the product of basin relief and drainage density (Strahler 1952). It is believed to have a strong positive correspondence with erosion susceptibility (Bhadran et al 2018). Low Rn values specify that the particular area is less susceptible to soil erosion and are structurally closely related to relief ratio and drainage density.…”

Section: Ruggedness Number (Ri)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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Influence of Neotectonics on Channel Evolution of Kameng River, North–East Himalaya

Das¹,

Barman²,

Islam

2022

Himalayan Neotectonics and Channel Evolution

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Morpho-hypsometric evolution of the Karuvannur River Basin, a tropical river in central Kerala, southwestern peninsular India

Cited by 11 publications

References 38 publications

Spatio‐temporal drought susceptibility assessment of Ken River Basin, Central India, and its evaluation through river's morphometry

Spatio‐temporal drought susceptibility assessment of Ken River Basin, Central India, and its evaluation through river's morphometry

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

Influence of Neotectonics on Channel Evolution of Kameng River, North–East Himalaya

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