School of Interdisciplinary Research, Indian Institute of Technology Delhi, New Delhi, India.
University of Queensland (UQ)-IITD Academy of Research, Indian Institute of Technology Delhi, New Delhi, India.
Environ Sci Pollut Res Int. 2023 Nov;30(55):116742-116750. doi: 10.1007/s11356-022-22421-1. Epub 2022 Aug 18.
Hyperspectral imaging technology has been used for biochemical analysis of Earth's surface exploiting the spectral reflectance signatures of various materials. The new-generation Italian PRISMA (PRecursore IperSpettrale dellaMissione Applicativa) hyperspectral satellite launched by the Italian space agency (ASI) provides a unique opportunity to map various materials through spectral signature analysis for recourse management and sustainable development. In this study PRISMA hyperspectral satellite imagery-based multiple spectral indices were generated for rapid pollution assessment at Ghazipur and Okhla landfill sites in Delhi, India. It was found that the combined risk score for Okhla landfill site was higher than the Ghazipur landfill site. Various manmade materials identified, exploiting the hyperspectral imagery and spectral signature libraries, indicated presence of highly saline water, plastic (black, ABS, pipe, netting, etc.), asphalt tar, black tar paper, kerogen BK-Cornell, black paint and graphite, chalcocite minerals, etc. in large quantities in both the landfill sites. The methodology provides a rapid pollution assessment tool for municipal landfill sites.
高光谱成像技术已被用于对地球表面的生化分析，利用各种材料的光谱反射特征。意大利航天局（ASI）发射的新一代意大利 PRISMA（应用任务高光谱宽视场遥感器）高光谱卫星提供了通过光谱特征分析对各种材料进行制图的独特机会，以实现资源管理和可持续发展。在本研究中，生成了基于 PRISMA 高光谱卫星图像的多个光谱指数，用于对印度德里的加兹普尔和奥赫拉垃圾填埋场进行快速污染评估。结果发现，奥赫拉垃圾填埋场的综合风险评分高于加兹普尔垃圾填埋场。利用高光谱图像和光谱特征库识别出的各种人造材料表明，两个垃圾填埋场都存在大量高盐度水、塑料（黑色、ABS、管道、网眼等）、沥青焦油、黑色焦油纸、伯克勒尔干酪根 BK-康奈尔、黑色油漆和石墨、铜蓝矿物等。该方法为城市垃圾填埋场提供了一种快速污染评估工具。
