Long-term changes in microbial water quality indicators in a hydro-power plant reservoir: The role of natural factors and socio-economic changes
| Autor: | Agnese Lasmane, Māris Bērtiņš, Ilga Kokorīte, Lesya Gnatyshyna, Gunta Spriņġe, Oksana Stoliar, Valery Rodinov |
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| Rok vydání: | 2021 |
| Předmět: |
Geography
Planning and Development Drainage basin 010501 environmental sciences 01 natural sciences 03 medical and health sciences 0302 clinical medicine Rivers Environmental protection Water Quality Environmental Chemistry media_common.cataloged_instance 030212 general & internal medicine European union Turbidity Agricultural productivity Nonpoint source pollution Hydropower Quality Indicators Health Care 0105 earth and related environmental sciences media_common geography geography.geographical_feature_category Ecology business.industry Water General Medicine Latvia Socioeconomic Factors Environmental science Sewage treatment Water quality Water Microbiology business Environmental Monitoring Power Plants Research Article |
| Zdroj: | Ambio |
| ISSN: | 1654-7209 0044-7447 |
| Popis: | Long-term changes, from 1984 to 2010, in the indicators of microbial pollution (total viable count, coliforms, Escherichia coli, enterococci, and Clostridium perfringens) are analysed in the Riga Hydropower Plant Reservoir, an essential source of drinking water for Riga, the capital of Latvia. Counts in microbial indicators fluctuated seasonally and were related to physicochemical parameters (nitrogen compounds, turbidity, temperature, and pH). The changes in microbial pollution were brought about by two major socio-economic developments. Firstly, Latvia’s independence from the USSR in 1991 which facilitated a distinct reduction in most microorganism counts due to a sharp decline in industrial and agricultural production. This resulted in a significant drop in point and nonpoint pollution in the river basin. A further development was Latvia joining the European Union in 2004. The corresponding focus on water management, including wastewater treatment, was a major priority of environmental investment and lead to improvements in microbial water quality. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s13280-020-01470-1) contains supplementary material, which is available to authorized users. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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