International Science Community Association International Research Journal of Environmental Sciences 15 2 2026 04 22 Gradient indication and spatial analysis of heavy metal redistribution in soils of the Surgil gas field (Aral sea region, Uzbekistan) 18 25 EN Mallick Debashis 1 Department of Chemistry, Mrinalini Datta Mahavidyapith, Kolkata-51, West Bengal, India Mah`ato Sanjoy 2 Department of Chemistry, A. P. C. College, New Barrackpore, Kolkata-131, West Bengal, India Koley Rajesh 3 Environmental Chemistry Laboratory, Department of Environmental Science, Burdwan University, West Bengal, India Roy Mrinal Kanti 4 Department of Geography, Mrinalini Datta Mahavidyapith, Kolkata-51, West Bengal, India Huang Alyssa H. 1 Northwestern Medicine / Feinberg School of Medicine; Lavin Pavilion Floor Suite 1900, 259 East Erie Street, Chicago, Illinois, 60611; US Sam U. Ho 2 Northwestern Medicine / Feinberg School of Medicine; Lavin Pavilion Floor Suite 1900, 259 East Erie Street, Chicago, Illinois, 60611; US MD 3 Baxtiyarovich Jollibekov Murat 1 Karakalpak Scientific Research Institute of Natural Sciences, Nukus, Uzbekistan Saribayevna Tleumuratova Bibigul 2 Karakalpak Scientific Research Institute of Natural Sciences, Nukus, Uzbekistan Pulatovna Urazimbetova Elzura 3 Karakalpak State University, Karakalpak Scientific Research Institute of Natural Sciences, Nukus, Uzbekistan > Research Paper 2026 2 22 2026 04 22 The article discusses the results of research on technogenic soil contamination at the Surgil natural gas field using local and translocal monitoring methods, gradient indication method, GIS technologies, and environmental risk indices. Such features of the Surgil gas fields (SGF) as industrial development on the freshly dried seabed, heterogeneous orography, insufficient phytoremediation conditions, and mesoclimatic changes have been identified. A generalized assessment of technogenic pollution was obtained both for individual drilling wells and for the entire SGF territory. It was established that the soils and ground near boreholes are technically practically uncontaminated by cyanides and biogenic elements, slightly contaminated by mineral salts and trace elements of nickel and chromium, moderately contaminated by arsenic and trace elements of cadmium and zinc. The content of selenium and lead ranges from moderate to severe pollution. Soil-grounds are heavily contaminated with copper microelements. The content of heavy metal microelements in soil and soils on SGF poses a low environmental risk for the environment, except for cadmium, whose RI index increases significantly from 2011 to very high in 2022. Copyright@ International Science Community Association