engleski

Soil Water Balance Response to Climate Change in Posavina Region.

Posavina region represents the area with the most favorable natural conditions for agricultural production in Croatia and Bosnia and Herzegovina. Increase in the air temperature and changes in the amount of rainfall results in changes in evapotranspiration and the values of main water balance elements indicating the need for a precise determination of the current and future state of basic water balance elements, such as soil moisture deficit and the amount of runoff. Linear regression was applied to determine soil water balance response to climate change in Posavina region. The air temperature, precipitation, reference evapotranspiration and water balance components: actual evapotranspiration, total runoff, soil moisture deficit and amount of snow trends were analyzed. Monthly weather data from 4 weather stations, two in Croatia: Slavonski Brod and Gradište ; and two in Bosnia and Herzegovina: Doboj and Gradačac, for the time period of 58 years (1961–2018) were used. The results obtained show increasing trends in annual air temperature (0.032 °C–0.057 °C year−1), sum of precipitation (1.424 mm–2.317 mm year−1), reference evapotranspiration (0.462 mm–4.640 mm year−1), actual evapotranspiration (0.019 mm– 2.190 mm year−1), soil moisture deficit (0.443 mm–2.672 mm year−1) and total runoff (0.286– 2.46 9 mm year−1) series and decreasing trend in the annual amount of snow (0.676–1.664 mm year−1). Results obtained are showing an urgent need to start with climate change adaptation measures and actions to combat the negative impact of climate change in the Posavina region.

Water balance ; Climate change ; Posavina region ; Sava River

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