Remote sensing insights for sustainable development: Water quality and landscape dynamics in Mirik Lake, Darjeeling District, West Bengal, India

Subhra Halder , Suddhasil Bose
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Abstract

The study employs remote sensing and GIS techniques to assess the water quality dynamics of Mirik Lake, located in the Darjeeling Himalayas, West Bengal, India. To analyse the impact of land use and land cover (LULC) changes on the water quality of Mirik Lake from 1993 to 2023. Landsat imagery spanning from 1993 to 2023 was used to detect significant alterations in LULC patterns. Remote sensing and GIS techniques were utilised to analyse the data, focusing on changes in LULC and their implications for water quality. The results indicate a steady increase in total phosphorus (TP), total nitrogen (TN), and Biological Oxygen Demand (BOD) levels, attributed to anthropogenic activities such as urbanisation and tourism development. LULC change analysis highlights the expanding built-up areas and agricultural lands surrounding the lake, contributing to nutrient loading and organic pollution. The spatial distribution of pollution categories underscores the influence of tourist infrastructure on water quality degradation. Integrated watershed management and sustainable development strategies are recommended to mitigate anthropogenic impacts and preserve the ecological integrity of Mirik Lake.

遥感技术促进可持续发展:印度西孟加拉邦大吉岭地区米里克湖的水质和景观动态
本研究采用遥感和地理信息系统技术评估位于印度西孟加拉邦大吉岭喜马拉雅山脉的米里克湖的水质动态。分析 1993 年至 2023 年土地利用和土地覆被 (LULC) 变化对米里克湖水质的影响。利用 1993 年至 2023 年的陆地卫星图像检测 LULC 模式的显著变化。利用遥感和地理信息系统(GIS)技术分析数据,重点关注 LULC 的变化及其对水质的影响。结果表明,总磷(TP)、总氮(TN)和生物需氧量(BOD)水平稳步上升,这归因于城市化和旅游业发展等人为活动。土地利用、土地利用变化(LULC)变化分析显示,湖泊周围的建筑区和农田不断扩大,加剧了养分负荷和有机污染。污染类别的空间分布凸显了旅游基础设施对水质退化的影响。建议采用流域综合管理和可持续发展战略,以减轻人为影响并保护米里克湖的生态完整性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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