Assessment of Meteorological Drought Trends in a Selected Coastal Basin Area in Poland—A Case Study

The aim of this study is to investigate the patterns and trends drought occurrence in northern part Poland on example Łeba river basin years 1956–2015. meteorological was conducted basis Standardized Precipitation Index (SPI) scale 1, 3, 6, 9, 12 months. Annual precipitation totals did not show significant changes analyzed period, except for station Wejherowo, which characterized by a increasing trend. analysis long term variability average annual air temperature showed its statistically increase area at rate about 0.2 °C per decade. During 14 84 droughts were identified, with durations ranging from 200 300 As period accumulating values SPI, number decreased, while their total duration increased. Most mild nature, extreme accounted between 5.2% 10.7% duration. Drought intensification shown only SPI-1 February March Wierzchucino station. On other hand, decreasing trend SPI noted during longer periods accumulation (SPI-6, 12).