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VOL. 10, ISSUE 6 (2023)
Assessing wetland depth loss and perenniality decline due to siltation: A case study of Kasodhora Beel, Burhachapori Wildlife Sanctuary, Assam
Authors
Dr. Smarajit Ojah
Abstract
Wetland ecosystems of the Brahmaputra
floodplain are undergoing rapid geomorphological and hydrological
transformations, primarily driven by accelerated siltation. This study
investigates a decade-long change (2013–2023) in the depth and water-retention
characteristics of Kasodhora Beel, located within the Burhachapori Wildlife
Sanctuary (BWLS), Assam. Using field-based bathymetric surveys conducted during
the dry-season months of February and March, combined with geospatial analysis,
the study evaluates alterations in wetland extent, depth profiles, and
functional perenniality. Results reveal substantial infilling of the beel,
leading to a marked reduction in maximum depth from an estimated 7.0–7.5 m in
2013 to around 4.0 m by 2023. The area sustaining depths above the critical 4.5
m threshold required for perennial water presence has diminished to negligible
levels. Consequently, the wetland now dries up completely by late March,
indicating functional loss of perennial characteristics. These findings align with
earlier studies from the Brahmaputra floodplain, which highlight increased
sediment loads, channel instability, and wetland shrinkage as key ecological
concerns (Boruah & Goswami, 2014; Das et al., 2021). The study
underscores the need for hydrological restoration, catchment management, and
sediment-control interventions for safeguarding wetland functionality within
protected areas of Assam.
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Pages:103-107
How to cite this article:
Dr. Smarajit Ojah "Assessing wetland depth loss and perenniality decline due to siltation: A case study of Kasodhora Beel, Burhachapori Wildlife Sanctuary, Assam". International Journal of Multidisciplinary Research and Development, Vol 10, Issue 6, 2023, Pages 103-107
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