Topographical And Physico-Chemical Dynamics Influencing Fishery Potential In The Beki River, Assam

Abstract

The Beki River, a trans-boundary tributary of the Brahmaputra, forms an integral part of the hydro-ecological landscape of Assam’s Barpeta district. This study explores how the river’s topographical features and physico-chemical dynamics collectively govern its fishery potential. Using drone-based spatial mapping, we document alterations in river morphology, including shifting channels, sediment deposition zones, and floodplain connectivity. Seasonal assessments of key physico-chemical parameters—including pH, dissolved oxygen, nutrient load, and turbidity—further elucidate the ecological conditions that influence aquatic productivity. Our findings reveal that variations in topographical gradients directly shape aquatic microhabitats, influencing breeding and foraging zones critical for indigenous fish populations. Simultaneously, elevated sedimentation rates and nutrient influx from agricultural run-off are linked to habitat degradation and periodic declines in fish catch. The synergistic impact of these factors poses emerging challenges to the sustainability of riverine fisheries. This study highlights the necessity of integrating topographical analysis with water quality monitoring to accurately assess fishery potential in riverine systems. The insights generated offer a scientific basis for devising sustainable fishery management practices and habitat restoration strategies for the Beki River, contributing to broader freshwater conservation efforts in the Brahmaputra basin.