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Nitrate pollution in the Warta River (Poland) between 1958 and 2016: trends and causes

The article presents analyses of long-term water quality data from the Warta River between 1958 and 2016. A clear increasing trend in nitrate concentrations was observed from 1958 to the early 1990s. This trend was mainly related to the increasing use of fertilizers in Poland in this period. Then, a...

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Published in:Environmental science and pollution research international 2019-01, Vol.26 (3), p.2038-2046
Main Authors: Górski, Józef, Dragon, Krzysztof, Kaczmarek, Piotr Michał Jan
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description The article presents analyses of long-term water quality data from the Warta River between 1958 and 2016. A clear increasing trend in nitrate concentrations was observed from 1958 to the early 1990s. This trend was mainly related to the increasing use of fertilizers in Poland in this period. Then, after the early 1990s, a slow decreasing trend related to improvements in water and sewage management and more rational fertilizer use was observed after political and economic changes in Poland. The influence of long-term hydrological droughts on nitrate concentrations was also investigated. Sharp increases in the nitrate concentration in surface water were related to the accumulation of contaminants in the soil and aeration zone during drought periods and the subsequent transport of these contaminants to groundwater and surface water via recharge infiltration after each drought period. The presented results highlight the importance of surface water–groundwater interactions and suggest that groundwater protection in an entire catchment area is essential for surface water quality protection.
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subjects Aeration
Aeration zone
Agriculture - trends
Agriculture and Water Supply Practices
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Catchment areas
Contaminants
Drought
Earth and Environmental Science
Economic change
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental Monitoring - methods
Environmental science
fertilizer application
Fertilizers
Fertilizers - analysis
Groundwater
Groundwater - chemistry
Groundwater management
Groundwater under Threat from Diffuse Contaminants: Improving on-Site Sanitation
Groundwater under Threat from Diffuse Contaminants: Improving on-Site Sanitation, Agriculture and Water Supply Practices
Humans
Hydrology
Infiltration
Nitrates
Nitrates - analysis
Poland
politics
pollution
Rivers
Rivers - chemistry
Sewage
soil
Soil - chemistry
Soil contamination
Soil pollution
Surface water
Surface-groundwater relations
Trends
Waste management
Waste Water Technology
Water Management
Water Pollutants, Chemical - analysis
Water pollution
Water Pollution Control
Water protection
Water Quality
Water Supply
watersheds
title Nitrate pollution in the Warta River (Poland) between 1958 and 2016: trends and causes
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