The aim of the study was to attempt to estimate the demand for water for raspberry grown in the Chojnice county depending on expected climate changes. The study takes into account two scenarios (RCP 4.5 and RCP 8.5) for the period 2021-2100. It was found that in the reference period, the total rainfall deficits during the raspberry growing season in the Chojnice county - in the average, moderately dry and very dry years - amounted 48 mm, 141 mm and 208 mm, respectively. The largest monthly rainfall deficit during the raspberry growing season of the reference period occurred in July. The amount of rainfall deficit - in the average, moderately dry and very dry year - was on the level 16 mm, 42 mm and 59 mm, respectively. In the forecast period (2021-2100), the largest monthly rainfall deficits during the raspberry growing season will also occur in July. These rainfall deficits under the RCP 4.5 scenario - in a medium, moderately dry and very dry year - will amount 25 mm, 52 mm and 70 mm, respectively. In the light of the RCP 8.5 scenario, rainfall deficits in July will be even higher and may amount to 27 mm, 55 ...
