Papers by Shashi shekhar Shukla
Proceedings of the Indian National Science Academy, 2025
geomorphic concept of the 'orderly sequence of landforms' (Thornbury 1954). Generally, fluvial sy... more geomorphic concept of the 'orderly sequence of landforms' (Thornbury 1954). Generally, fluvial systems show a downstream increase in channel width, discharge and hydraulic radius, and a decrease in channel gradient, and grain size (Schumm 2005; Bradshaw et al. 1978). However, rivers sometimes show unusual and complex behaviour (Malik et al. 2024), contrary to established trends. Complexity is a situation between 'order' and 'chaos' (Richards 2002), where difficulty is faced in describing the system characteristics (Manson 2001). The word 'complexity' has been used in different ways with rivers (Sivakumar et al. 2007; Zhou et al. 2012; Kourgialas et al. 2012; Zhang et al. 2017), but here, it is related to the geomorphological characteristics of the river. There are different interpretations of complexity in geomorphology (Keiler 2011). According to Phillips (2003), complexities are complications in the prediction of different facets of geomorphology, but they provide an
Arabian Journal of Geosciences, 2019
Palaeochannels can be good possible reservoirs of groundwater and are good rechargeable aquifers.... more Palaeochannels can be good possible reservoirs of groundwater and are good rechargeable aquifers. Bakulahi is a plain-fed tributary of the Sai River flowing from northwest to southeast direction with about 177-km length and about 841-km 2 catchment area. It emanates from interconnected series of tals (large-to medium-sized shallow depressions) situated in the Raebareli district, Uttar Pradesh, India. Course of the Bakulahi River is shifted laterally and left many fluvial landformspalaeochannels, oxbow lakes, meander cutoff, etc. The present study is based on the on-screen digitization of the Bakulahi River basin boundary, drainage network, palaeocourses, and other surface water bodies from high-resolution remote-sensing data (1 m × 1 m) available at Google Earth. The digitized details from remote sensing data are validated with some field observations. Different thematic maps are prepared by converting Google Earth feature files (.kmz/.kml) into GIS feature files (.shp) and importing layers into the GIS environment. There are about 115 palaeochannels covering about 137-km 2 area (16.29%); about 6000 surface water bodies in forms of ponds/tanks having 23.36-km 2 area (2.74%) and 40 oxbow lakes are mapped within the basin. This is the first scientific attempt to trace palaeocourses of the Bakulahi River. The present paper also answers the question about the origin of the Bakulahi River. Demarcation of precise basin boundary through manual method by using high-resolution remotesensing data is another contribution of this exercise which is otherwise a difficult task without the availability of high resolution DEM.
Acta Universitatis Lodziensis. Folia Geographica Physica
is one of the largest alluvial tracts of the world consisting of rivers of different types and si... more is one of the largest alluvial tracts of the world consisting of rivers of different types and sizes. The domination of the fluvial process has evolved the different kinds of fluvial landforms on this plain. The palaeo-fluvial features have a significant presence in the region but are less explored/mapped. Palaeo-fluvial features are remanent of the past that are disconnected from the process that forms them. The palaeo-fluvial landforms on distant interfluve surfaces of the Central Ganga Plain are disconnected from the present rivers. The major palaeo-fluvial landforms observed in this region are palaeo-channel and associated oxbow lakes, meander scars etc. The evolution of such features is still not understood properly. These palaeo-fluvial features are a possible result of changing past climatic and geologic conditions in the region. The landscape memory of such features could be very important to understand the climatic and tectonic changes of the past. Apart from that, they do control several physical-cultural aspects of the region. The large-scale mapping of such features is very important to locate the old path of flow, the direction of channel changes, events of river capturing, and the evolution of contemporary rivers. The study of such features is required to understand the past evolution of the Ganga plain and to understand the impact of such features on the present physio-cultural setting.
Arabian Journal of Geosciences, 2019
Palaeochannels can be good possible reservoirs of groundwater and are good rechargeable aquifers.... more Palaeochannels can be good possible reservoirs of groundwater and are good rechargeable aquifers. Bakulahi is a plain-fed tributary of the Sai River flowing from north-west to south-east direction with about 177-km length and about 841-km2 catchment area. It emanates from interconnected series of tals (large- to medium-sized shallow depressions) situated in the Raebareli district, Uttar Pradesh, India. Course of the Bakulahi River is shifted laterally and left many fluvial landforms—palaeochannels, oxbow lakes, meander cutoff, etc. The present study is based on the on-screen digitization of the Bakulahi River basin boundary, drainage network, palaeocourses, and other surface water bodies from high-resolution remote-sensing data (1 m × 1 m) available at Google Earth. The digitized details from remote sensing data are validated with some field observations. Different thematic maps are prepared by converting Google Earth feature files (.kmz/.kml) into GIS feature files (.shp) and importing layers into the GIS environment. There are about 115 palaeochannels covering about 137-km2 area (16.29%); about 6000 surface water bodies in forms of ponds/tanks having 23.36-km2 area (2.74%) and 40 oxbow lakes are mapped within the basin. This is the first scientific attempt to trace palaeocourses of the Bakulahi River. The present paper also answers the question about the origin of the Bakulahi River. Demarcation of precise basin boundary through manual method by using high-resolution remotesensing data is another contribution of this exercise which is otherwise a difficult task without the availability of high resolution DEM.
Arabian Journal of Geosciences, 2019
Palaeochannels can be good possible reservoirs of groundwater and are good rechargeable aquifers.... more Palaeochannels can be good possible reservoirs of groundwater and are good rechargeable aquifers. Bakulahi is a plain-fed tributary of the Sai River flowing from north-west to south-east direction with about 177-km length and about 841 sq. km catchment area. It emanates from interconnected series of tals (large- to medium-sized shallow depressions) situated in the Raebareli district, Uttar Pradesh, India. Course of the Bakulahi River is shifted laterally and left many fluvial landforms— palaeochannels, oxbow lakes, meander cutoff, etc. The present study is based on the on-screen digitization of the Bakulahi River basin boundary, drainage network, palaeocourses, and other surface water bodies from high-resolution remote-sensing data (1 m × 1 m) available at Google Earth. The digitized details from remote sensing data are validated with some field observations. Different thematic maps are prepared by converting Google Earth feature files (.kmz/.kml) into GIS feature files (.shp) and importing layers into the GIS environment. There are about 115 palaeochannels covering about 137-km2 area (16.29%); about 6000 surface water bodies in forms of ponds/tanks having 23.36 sq. km area (2.74%) and 40 oxbow lakes are mapped within the basin. This is the first scientific attempt to trace palaeocourses of the Bakulahi River. The present paper also answers the question about the origin of the Bakulahi River. Demarcation of precise basin boundary through manual method by using high-resolution remote sensing data is another contribution of this exercise which is otherwise a difficult task without the availability of high resolution DEM.
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Papers by Shashi shekhar Shukla