Dynamics of the Maniyari River and its meandering nature inside Achankmar Tiger Reserve Area, Chhattisgarh, India: A geospatial analysis
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The Achanakmar Tiger Reserve (ATR) is an integral part of Achanakmar-Amarkantak Biosphere reserve (AABR) covering a total area of 914.017 sq. km. The Maniyari River flowing
through the reserve area is known to be its life line. It originates from core zone (Sihawal sagar) of ATR and merges in Seonath river of Mahanadi Basin. It flows through Mungeli and Bilaspur
districts for about 105 km. This river provides water seasonally to its catchment (6-8 months) and flows more than half of its length (approx. 60 km) inside the reserve area. Its catchment
area has rich biodiversity of tree species. Shorea robusta being the dominant tree species of the area followed by tree species like Terminalia tomentosa, Diospyros melanoxylon,
Adina cordifolia, Pterocarpus marsupium, Madhuca indica, Anogeissus latifolia, Tectona grandis (plantation) and Bamboo (Dendrocalamus strictus).
A geospatial analysis was performed to understand the course of Maniyari River inside ATR area encompassing a period of fourteen years during 2000 to 2013. Imageries from Indian
Remote Sensing (IRS) satellite 1D and P6 images for years 2000, 2004, 2008, 2010 and 2013 and Survey of India toposheets were analyzed to study the changes in planform characteristics of Maniyari River. The meander shift of the river has been delineated taking into consideration the reach’s R1 (11.61 km), R2 (11.19 km), R3 (5.33 km) and R4 (5.02 km) respectively. Sinuosity Index (SI) for different reaches have been calculated and evaluated. The SI ranged from 1.40 to 1.63, 1.20 to 1.29, 1.17 to 1.37, and 1.20 to 1.49 in R1, R2, R3 and R4
respectively and the amount of shifting was analyzed taking the year 2000 as a base year. The overall SI for all the reach’s ranges between 1.30 to 1.36.The present study will be
helpful to understand the river dynamics as well as to maintain the flow of Maniyari River and prevent bank line erosion. The study will be helpful for the conservation of river flow and its
tributaries in the ATR area of Central India.
Keywords: Achanakmar Tiger Reserve (ATR), River Maniyari, Meander, LISS III, Sinuosity Index, Geospatial analysis.
ID:3487479