{"title":"Changes in Water Quality in the Modonkul River Assessed by Combinatory Pollution Index","authors":"Z. I. Khazheeva, A. M. Plyusnin, B. V. Dampilova","doi":"10.1134/s0097807824700921","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Water quality in the Modonkul’ River, flowing in a territory with mining industry, is considered. The analyzed data characterize the period 2019–2021. The assessment of pollution or the parameterization of water quality were carried out using the universal combinatory index of water pollution. In the upper reaches of the Modonkyl’ River, the water chemistry is of hydrocarbonate calcium type. In the zone of mixing of river and mine waters, the water chemistry changes to sulfate, mostly, sodium-calcium-magnesium type. The general regularity in the behavior of microelements in the Modonkul’ R. water is an increase in their concentration at an increase in TDS. Downstream the river, the concentrations of heavy metals increase: Cu, Zn, Pb by 1.1–1.4 times; Mn, Co, As by 6.6–11 times; and Cd, by 8 times. In the upper reaches of the river, its water quality was classified as <i>weakly polluted</i>, 2nd class. Further downstream, the water is classified as <i>dirty</i>, 4th class with a decrease in the subclass from <i>a</i> to <i>b</i>.</p>","PeriodicalId":49368,"journal":{"name":"Water Resources","volume":"18 1","pages":""},"PeriodicalIF":0.9000,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water Resources","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1134/s0097807824700921","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"WATER RESOURCES","Score":null,"Total":0}
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Abstract
Water quality in the Modonkul’ River, flowing in a territory with mining industry, is considered. The analyzed data characterize the period 2019–2021. The assessment of pollution or the parameterization of water quality were carried out using the universal combinatory index of water pollution. In the upper reaches of the Modonkyl’ River, the water chemistry is of hydrocarbonate calcium type. In the zone of mixing of river and mine waters, the water chemistry changes to sulfate, mostly, sodium-calcium-magnesium type. The general regularity in the behavior of microelements in the Modonkul’ R. water is an increase in their concentration at an increase in TDS. Downstream the river, the concentrations of heavy metals increase: Cu, Zn, Pb by 1.1–1.4 times; Mn, Co, As by 6.6–11 times; and Cd, by 8 times. In the upper reaches of the river, its water quality was classified as weakly polluted, 2nd class. Further downstream, the water is classified as dirty, 4th class with a decrease in the subclass from a to b.
期刊介绍：
Water Resources is a journal that publishes articles on the assessment of water resources, integrated water resource use, water quality, and environmental protection. The journal covers many areas of research, including prediction of variations in continental water resources and regime; hydrophysical, hydrodynamic, hydrochemical and hydrobiological processes, environmental aspects of water quality and protection; economic, social, and legal aspects of water-resource development; and experimental methods of studies.
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