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Research Paper | Geography | Volume 15 Issue 6, June 2026 | Pages: 1220 - 1224 | India
The Impact of Himalayan Infrastructural Development on Downstream Soil Geochemistry and Agricultural Fertility
Abstract: The Indian Himalayan Region (IHR) is undergoing rapid infrastructural expansion, characterized by national highway widening, railway tunnel excavations, and hydroelectric project installations. These heavy engineering activities have severely destabilized mountain slopes, causing an unprecedented volume of sediment- a mixture of boulders, gravel, sand, and soil transported by water or gravity- to displace into river systems. During periods of heavy monsoon rainfall and flash floods, this anthropogenically generated debris travels down mountain channels and deposits into the agricultural fields and irrigation networks of the downstream Indo-Gangetic plains, specifically affecting Uttar Pradesh, Bihar, and West Bengal. This research paper presents a comprehensive geochemical assessment of whether this modern influx rejuvenates soil fertility or induces sterility. By analyzing the mineralogical composition of the Himalayan parent material-the primary geological bedrock from which soil slowly develops over centuries- and its processes of weathering-the mechanical breakdown or chemical decomposition of rocks- this study demonstrates that technogenic muck and chemical residue severely degrade the soil's Cation Exchange Capacity (CEC)- the magnetic ability of soil particles to bind and retain essential plant nutrients. Consequently, the highly fertile alluvial plains of eastern Northern India are progressively becoming unproductive and unfit for sustainable agriculture.
Keywords: Himalayan Infrastructure Development, Soil Geochemistry, Agricultural Fertility, Technogenic Muck, Indo-Gangetic Plains, Cation Exchange Capacity (CEC), Sediment Dynamics, Alkaline Shock, Heavy Metal Bioaccumulation
How to Cite?: Prabhakar Kumar Awasthi, "The Impact of Himalayan Infrastructural Development on Downstream Soil Geochemistry and Agricultural Fertility", Volume 15 Issue 6, June 2026, International Journal of Science and Research (IJSR), Pages: 1220-1224, https://www.ijsr.net/getabstract.php?paperid=SR26622122715, DOI: https://dx.doi.org/10.21275/SR26622122715