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    Effect of the forecast air temperature change on the water needs of vines in the region of Bydgoszcz, Northern Poland
    (2022) Jagosz, Barbara; Rolbiecki, Stanislaw; Rolbiecki, Roman; Ptach, Wieslaw; Sadan, Hicran Asmin; Kasperska-Wolowicz, Wieslawa; Pal-Fam, Ferenc; Atılgan, Atılgan
    The climatic changes observed in Poland are manifested by an increase in air temperature, but not an increase in rainfall, which causes an increase in the water needs of plants, and hence the necessity to develop irrigation systems for crops. The aim of this study was to assess the water needs of grapevines in 2021-2050 in the Bydgoszcz region (northern Poland), an area with high requirements for supplementary irrigation. The calculations were based on the expected changes in air temperature according to the climate change scenario for Poland: the 4th Intergovernmental Panel on Climate Change-Special Report on Emissions Scenarios: balanced scenario (A1B). The average monthly temperature in 1981-2010 was used in the calculations. The water needs of grapevines were estimated using the reference evapotranspiration calculated using the Blaney-Criddle equation, and then using the crop coefficient and potential (crop) evapotranspiration. It was found that in 2021-2050, the water needs of grapevines, both during the growing season (May-September) and during the irrigation period (June-August), will increase by 6%. The highest and significant increase in water needs, by 10%, should be expected in August. The estimated increase in water needs of grapevines indicates the need to development sustainable irrigation systems for vineyards in northern Poland.
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    Öğe
    Investigation of Annual Lake Water Levels and Water Volumes with Sen Innovation and Mann-Kendall Rank Correlation Trend Tests: Example of Lake Egirdir, Turkey
    (Mdpi, 2022) Yucel, Ali; Markovic, Monika; Atilgan, Atilgan; Rolbiecki, Roman; Ertop, Hasan; Jagosz, Barbara; Ptach, Wieslaw
    Lakes are the most important freshwater resources for humans. It is stated that together with population growth, unplanned urbanization, excessive water consumption, industrialization, and unconscious irrigation, global climate change causes changes in the water levels and volumes of lakes. Lake Egirdir in Turkey, which is important in terms of drinking and irrigation water use, was chosen as the study area. Lake Egirdir water level (LWL) and water volume (LWV) values measured between 1988-2019 were used. Dependencies in the annual LWL and LWV were examined by autocorrelation analysis, and trend changes were examined by regression analysis, the Mann-Kendall rank correlation test, and the Sen innovation trend test. The research has shown a significant decrease since 2000 in LWL and since 1990 in LWV. The LWL has decreased by -1.272 to -3.514 m and the LWV has decreased by -72.980 to -1082.134 hm(3) in approximately 32 years. The actions to be taken based on the values determined in this study will help protect the water resources of lakes. As a result of the tests used in our study, it was determined that there were decreases in both the water level and the volume of the lake. The climatic changes in the lake basin and the decrease in the water resources feeding the lake are shown as the biggest factor in these reductions.