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Raju, P. V.
- Palaeo and Present Channel of Assi River, Uttar Pradesh, India
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Authors
Affiliations
1 Department of Geography, Institute of Science, Banaras Hindu University, Varanasi 221 005, IN
2 Water Resources Assessment Division, National Remote Sensing Centre, Indian Space Research Organisation, Hyderabad 500 037, IN
1 Department of Geography, Institute of Science, Banaras Hindu University, Varanasi 221 005, IN
2 Water Resources Assessment Division, National Remote Sensing Centre, Indian Space Research Organisation, Hyderabad 500 037, IN
Source
Current Science, Vol 118, No 4 (2020), Pagination: 630-639Abstract
The Assi river in Varanasi, Uttar Pradesh, India, is now a small, local, ephemeral floodplain tributary of River Ganga, with a length of about 8 km and catchment area of about 22 km2. It has also turned into a filthy drain. There are evidences in the form of palaeochannels, through patterns of water bodies and settlements along them, to suggest the origin of Assi river near Allahabad flowing through a distance of about 120 km up to Varanasi to meet the Ganga. There is also the possibility that Assi started as a takeoff from River Ganga and flowed as a Yazoo stream. Through on-screen digitization from high and medium-resolution remote sensing data – BHUVAN and Google Earth, CORONA aerial photographs, IRS P6 LISS-IV, Landsat 1, 3, 5, 7, 8 – and a number of cross profiles from SRTM 30 m digital elevation model (DEM), palaeochannel of Assi has been delineated. Also, a 1 m DEM was generated for the present Assi catchment area from about 5000 DGPS points to present proof that the present Assi is a misfit in once a wider valley shaped by heavy discharge coming from a greater length of channel and a larger catchment area.Keywords
Catchment Area, Flood Plains, Palaeochannel, Remote Sensing.Full Text
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