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Impact of runoff prediction on grey water footprint in a small agricultural catchment

100%

Hejduk L. , Hejduk A.

Meteorology Hydrology and Water Management. Research and Operational Applications

2019

tom Vol. 7, Iss. 1

41--46

According to Hoekstra et al. (2011) the water footprint within a geographic area is defined as the total freshwater consumption and pollution within the boundaries of the area. The grey part of the water footprint refers to pollution and is an indicator of the water volume needed to assimilate a pollutant load that reaches a water body. It is possible then, based on the grey water footprint to estimate if the water available in a river at a particular crosssection will be sufficient to maintain a water pollution level (WPL) below 100%. The crossing of 100% indicates that the waste assimilation capacity has been fully consumed in this particular catchment. In this paper, the grey water footprint from nonpoint source pollution has been calculated based on long-term hydrometrological data for the upper part of a small agricultural catchment (area of 23.4 km2 ) (Zagożdżonka River) in central Poland. Based on land use and the amount of fertilizers applied in the catchment, together with information about the natural concentration of nitrogen and phosphorus in the river, as well as maximum acceptable concentration, the water pollution level has been calculated for actual conditions. The estimation of future runoff decreases for the considered catchment (Banasik, Hejduk 2012) has been applied in order to estimate potential future water pollution levels. The calculation shows that, even when the management practices in this catchment remain as they are, including the current extensive crop production, the WPL of 100% will be exceeded in the year 2033 (for phosphorus) and 2043 (for nitrogen) due only to the decreasing availability of water.

Role of wastewater treatment plants in pollution reduction - evaluated by Grey Water Footprint indicator

88%

Stejskalova L. , Ansorge L. , Kucera J. , Cejka E.

Przegląd Naukowy. Inżynieria i Kształtowanie Środowiska

2022

tom 31

nr 1

Comparison of the water footprint in Poland and Ukraine

63%

Panasiuk D. , Suduk O. , Miłaszewski R. , Skrypchuk P.

Ekonomia i Środowisko

2018

tom nr 4

112--123

The aim of the article is to compare the indices of water resources in Poland and Ukraine. The water footprint is an instrument which allows to link the consumption of water resources with the consumption of goods. The blue water footprint shows the consumption of water for production of goods, the green – the use of rainwater in agriculture and forestry and the gray – the amount of water necessary to assimilate pollution. Poland and Ukraine have different climates. The north-western part of Ukraine has a climate similar to Poland, i.e. moderate continental with an annual rainfall of 600 mm/ yr. Southern Ukraine is a grassland plain with warm continental and marine climate and an annual rainfall of 300 mm/yr. This generates a greater need of water for Ukrainian agriculture. The green footprint of Ukraine (2302 m3/cap/yr) is twice as high as that in Poland (1121 m3/cap/yr). As a result, the total water footprint of Ukraine (2881 m3/cap/yr) exceeds the total water footprint of Poland (1503 m3/cap/yr). Analysis of “virtual water” indicates that the total net export of water from Ukraine is 282 m3/cap/yr. At the same time, the net import of water to Poland amounts to 147 m3/cap/yr.