International Journal For Multidisciplinary Research

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Volume 8 Issue 3
May-June 2026

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Anthropogenic Impact on River Course Shifting: A Case Study Along Hatipahar Region of The Nagavali River in Rayagada District, Odisha

Author(s) Dr. Shreya Bandyopadhyay
Country India
Abstract The Nagavali River within the Rayagada District of Odisha, India is flowing north to south through a narrow longitudinal valley between east and west facing ranges. Earlier the river used to flow through rocky course along the piedmont slope of the eastern ridge by forming a small waterfall locally known as Hatipahar. In the year 2006, a narrow canal had been dug through the alluvial deposit along the right bank to construct a dam for a hydrel power project. On 3rdJuly, 2006, torrential rainfall occurred at the upper catchment of the river causing huge discharge and thereby plenty amount of erosion of the softer alluvium across the canal. Because of this flash flood the Nagavali River started to flow through this canal leaving the earlier course abandoned. The present study was aimed to analyse all the possible causes behind the shifting of the river course. Google Earth and SRTM DEM have been used for demarcating the location and spatio-temporal changes along the river. Intensive field survey along with GPS, Dumpy Level, has been carried out in order to prepare a micro level elevation model and to understand stratigraphic -lithological scenario of the area. After that single event the river has shifted about 550 meters westward and tolled about 0.54 km2 loss of land. The newly formed course has established itself over the bed rock along the Hatipahar Region and still possessing very active head-ward erosion and valley incision. This change is actively noticed upto 9.84 Km upstream of the river.
Keywords Piedmont slope, flash flood; longitudinal valley; course shifting
Published In Volume 8, Issue 3, May-June 2026
Published On 2026-05-02
DOI https://doi.org/10.36948/ijfmr.2026.v08i03.77089
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