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Detection of water stress due to the mining of ferruginous quartzite in a subarctic region

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Abstract

Studying the dynamics of groundwater in mining areas is important from the perspective of impact on ecosystems. This study determines water stress for subarctic mining areas using modern methods—remote sensing, machine learning, GIS. The study is carried out using the example of the Kostomuksha mining cluster, located in the northwestern part of the Republic of Karelia, Russia. Water stress was studied based on changes in NDMI in different vegetation land cover classes. To bring different values of remote sensing data to a single scale, the method of normalization by pseudo-invariant features (PIF) was applied. Landscape, climatic, topographic, and anthropogenic factors that control changes in humidity were studied, for a total of 15 variables. The importance of predictors was assessed using the recursive feature elimination method. The most important predictors are vegetation LCC, valley depth, distance to road, elevation, and KdistQ. The topographical features of the area have a large influence on the natural dynamics of NDMI. The greatest negative changes occur on steep slopes, as well as hills and ridges. The accumulation of water in the valleys forms the positive dynamics of NDMI. The interaction of the influence of mining with natural patterns of changes in vegetation humidity has been studied. The greatest negative changes are manifested for all vegetation classes within the newly formed groundwater depression cones. In areas of previously formed depression cones, the adaptation of vegetation to water stress is noted. Deciduous vegetation in wetlands has been determined to be most sensitive to anthropogenic stress.

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All relevant raw data used in this study are available from the primary author.

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Acknowledgements

The study was carried out with the support of the Institute of Geology of the Karelian Research Center.

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NK: Conceptualization, Data curation, Investigation, Methodology, Visualization, Writing

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Correspondence to Natalya Krutskikh.

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Krutskikh, N. Detection of water stress due to the mining of ferruginous quartzite in a subarctic region. Environ Earth Sci 83, 324 (2024). https://doi.org/10.1007/s12665-024-11636-9

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  • DOI: https://doi.org/10.1007/s12665-024-11636-9

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