Assessing Turbidity Trends in the Himalayan Foothills: A Case Study of the Gaula River in Nainital District, Uttarakhand

Arti Bisht
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Arti Bisht: IPGGPG College of Commerce Haldwani, Kumaun University Nainital, India

International Journal of Latest Technology in Engineering, Management & Applied Science, 2025, vol. 14, issue 7, 695-698

Abstract: Turbidity is one of the most important parameter for assessing the health of river ecosystems in mountainous regions. In the Himalayan foothills, seasonal and anthropogenic disturbances frequently leads to elevated turbidity levels, negatively impact aquatic habitats and human water usage. The Gaula River, which flows through Nainital district of Uttarakhand, plays a vital role in regional hydrology and supports both ecological and domestic functions. Despite its importance, limited research focusing on turbidity variation and spatial distribution along its course exists. This study examine monthly turbidity data from three monitoring sites—Amritpur (upstream), Ranibagh (midstream), and Kathgodam (downstream)—from March 2019 to February 2020. Descriptive statistical technique is used to evaluate temporal and spatial patterns in turbidity. Findings shows turbidity level peaked during the monsoon, especially in July (mean: 113 NTU), indicating significant sediment influx likely driven by rainfall and upstream erosions. Post-monsoon and winter months observed lower turbidity values, with November been the least turbid (mean: 0.9 NTU). Among sites, Kathgodam records the highest turbidity, suggesting strong influence of urbanization and sediment transport dynamics downstream. Amritpur, located in a less disturbed forested zones, displays more stable turbidity except during monsoon peaks. These finding reflect a dynamic sediment regime controlled by climate and land uses patterns. The study reveals periods of concerns and highlights the downstream zone needing focused management. Data from these studies can serve as baseline for future assessments, planning, and hydrological model efforts. In addition, the research underscores need for integrated watershed strategies to minimize sediment input, especially in urbanizing stretches.

Date: 2025
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