Ukr. geogr. z. 2020, N4:38-48

N.M. Osadcha - Ukrainian Hydrometeorological Institute State Service of Ukraine on Emergencies and National Academy of Sciences of Ukraine, Kyiv;
V.I. Osadchyi - Ukrainian Hydrometeorological Institute State Service of Ukraine on Emergencies and National Academy of Sciences of Ukraine, Kyiv;
V.V. Osypov - Ukrainian Hydrometeorological Institute State Service of Ukraine on Emergencies and National Academy of Sciences of Ukraine, Kyiv;
S.V. Biletska - Ukrainian Hydrometeorological Institute State Service of Ukraine on Emergencies and National Academy of Sciences of Ukraine, Kyiv;
L.A. Kovalchuk - Ukrainian Hydrometeorological Institute State Service of Ukraine on Emergencies and National Academy of Sciences of Ukraine, Kyiv;
V.A. Artemenko - Ukrainian Hydrometeorological Institute State Service of Ukraine on Emergencies and National Academy of Sciences of Ukraine, Kyiv.


The article presents the national methodology for the identification of vulnerable areas to pollution of surface and ground water by nutrients compounds. The designation of nitrate vulnerable zones is an effective tool to reduce the impact of agricultural activities on water pollution by nutrients and is used for managing of diffuse pollution within river basins to achieve “good” ecological status. The analysis of heterogeneity of natural conditions in Ukraine and intensity of agricultural activity allows to determine 3 types of zones which differ in vulnerability: 1. Zones of high risk of water pollution, where nitrogen surplus in soil and washing and periodic washing regime are favorable for the nitrate leaching; 2. Zones of potential water pollution, where a deficient nitrogen balance in soil is observed in conditions of washing and periodic washing regime; 3. Zones of short-term pollution, where positive nitrogen balance in soil is noted by the unwashed water regime. The content of dissolved forms of mineral nitrogen (Nminer) in water and the presence of eutrophication process in the water body were recommended to use as criterias for designation of vulnerable zones. For the small rivers with a Strahler coefficient < 5, the nitrate vulnerable zones designation is recommended using the criterion of the nitrogen mineral forms content with a threshold value of 11,3 mgN/l. For the rivers with a Strahler coefficient ≥ 5, reservoirs, estuaries and coastal waters the designation is carried out on the basis of eutrophication. For the groundwater, it is based on the content of nitrogen mineral forms less than 9,7 mgN/l. This method was developed in Ukraine for the first time.

Key words: 
nitrate compounds, nitrate vulnerable zones, eutrophication, surface water body, ground water body

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