An integrated approach to map certain palaeochannels of South India using remote sensing, geophysics, and sedimentological techniques

Nandini, C.V.; Sanjeevi, S.; Bhaskar, Aparna S.

doi:10.1080/01431161.2013.803629

Cited by 18 publications

(4 citation statements)

References 3 publications

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“…FCC (false colour composite) (Figure 2 a) and true colour imagery of Landsat ETM+ have been generated by taking band combinations of 4, 3 and 2 as well as 3, 2 and 1 respectively. Histogram equalization technique has also been applied on Aster Terra Look and ETM + Pan mosaic data (Figure 2 b) to increase the colour contrast between the palaeo-channel trace and the surrounding region 6 . As the suspected palaeochannel is characterized by thick vegetation, the vegetation enhancement technique normalized difference vegetation index (NDVI) has been applied using ratio of Near Infrared (NIR) Band -Red Band/Near Infrared Band + Red Band to distinguish the vegetation band along the trace of the channel from that in the surrounding region.…”

mentioning

confidence: 99%

“…As the suspected palaeochannel is characterized by thick vegetation, the vegetation enhancement technique normalized difference vegetation index (NDVI) has been applied using ratio of Near Infrared (NIR) Band -Red Band/Near Infrared Band + Red Band to distinguish the vegetation band along the trace of the channel from that in the surrounding region. To get the topographic outline of the channel, spatial profiling technique has been applied to Shuttle Radar Topographic Mission (SRTM) data, using methods similar to that of Nandini et al 6 . Spatial profiling refers to the plotting of topographic elevation against distance to obtain the topographic outline (Figure 3 a).…”

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confidence: 99%

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Multi-Pronged Search for Palaeo-Channels near Konark Temple, Odisha - Implications for the Mythical River Chandrabhaga

et al. 2016

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confidence: 99%

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confidence: 99%

Multi-Pronged Search for Palaeo-Channels near Konark Temple, Odisha - Implications for the Mythical River Chandrabhaga

et al. 2016

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“…An insight into past floodplain activities, paleoclimatic conditions, and estuarine and alluvial depositional responses to prior to sea-level changes can be gained by palaeochannel studies (Kemp & Spooner, 2007;Nandini, Sanjeevi, & Bhaskar, 2013;Ryan, Bostock, Brooke, & Marshall, 2007). Evidence of the past discharge rates and flow regimes as a huge bulk of sedimentary loads is conserved within them (Sylvia & Galloway, 2006).…”

Section: Significance Of Palaeochannelsmentioning

confidence: 99%

Delineation and mapping of palaeochannels using remote sensing, geophysical, and sedimentological techniques: A comprehensive approach

Upadhyay

Sharma

2021

Water Science

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Palaeochannels are remnants of rivers or stream channels that flowed in the past and have been currently filled or buried by younger fluviatile sediments. There are a number of techniques for detecting palaeochannels with each of them having its own intrinsic advantages and disadvantages. In the present study, apart from applying different approaches, the capabilities, and effectiveness of the approaches to locate and map palaeochannels are compared. Remote sensing-based approaches are comprised of high-resolution satellite datasets and a LiDARderived elevation map for displaying extensive drainage networks of surface feature channels hypothesized to be palaeochannels, palaeorivers, or palaeovalleys. Ground-penetrating radar (GPR) transects along with concurrent visual observations are ground-truthing field approaches and has proved to be one of the most appropriate and accurate methods for locating palaeochannels due to their capability to identify subsurface sedimentary stratigraphy innate to palaeochannels. Nevertheless, visual field observations for ground-truthing of prospective palaeochnnels either exhibiting only subtle alterations in desiccation or vegetation are considered a potent field approach. The present review work lays a strong emphasis on delineation and mapping of palaeochannels using remote sensing, geophysical, and sedimentological techniques to meet the sustainable groundwater development goals.

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“…Aligned depressions along a channel trace may thus help to identify a remnant river valley, which can be detected in spatial profile, i.e. plot of elevation against distance 3,23 across the suspected channel. In the present study, spatial profiles have been drawn across the three transects T1-T3 (suspected to be palaeo-channels) on SRTM data with spatial resolution of 30 m (Figure 6 b).…”

Section: Image Manipulation Techniquesmentioning

confidence: 99%

Palaeo-Channel Bisecting Puri Town, Odisha:Vestige of the Lost River ‘Saradha’?

et al. 2018

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Puri, an ancient town located on the Odisha (Orissa) coast in eastern India, is associated with the 12th century CE Jagannath Temple. Many ancient and historical texts mention a mythical river named Saradha that flowed across the present Grand Road (Badadanda) between the Jagannath and Gundicha temples in Puri, dividing the town into two parts. This study traces the trail of a palaeo-channel beyond and within the heart of Puri town through an integrated study of geology, satellite imagery and ground-penetrating radar (GPR) survey. Various satellite imagery manipulation techniques -band combination, NDVI, MNDWI, linear spectral unmixing algorithm, density slice and spatial profiling -indicate the existence of water components along with vegetation bands, and the presence of a sinusoidal palaeo-channel trace with a V-shaped topographic outline. This is interpreted to represent the remnants of an extinct river valley. GPR survey also suggests that a subsurface river valley, about 128 m wide, existed across parts of the Grand Road. A large, sinusoidal water body near the sea beach at Puri, may represent the last remains of the dried-up channel. Integration of all these features suggests that a river once existed between Jagannath and Gundicha temples in Puri town. The constructed palaeo-channel trail may be that of the lost Saradha river described in ancient texts. The study develops a sequential methodology for identifying palaeo-channels even in urbanized localities like Puri.

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An integrated approach to map certain palaeochannels of South India using remote sensing, geophysics, and sedimentological techniques

Cited by 18 publications

References 3 publications

Multi-Pronged Search for Palaeo-Channels near Konark Temple, Odisha - Implications for the Mythical River Chandrabhaga

Multi-Pronged Search for Palaeo-Channels near Konark Temple, Odisha - Implications for the Mythical River Chandrabhaga

Delineation and mapping of palaeochannels using remote sensing, geophysical, and sedimentological techniques: A comprehensive approach

Palaeo-Channel Bisecting Puri Town, Odisha:Vestige of the Lost River ‘Saradha’?

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