TLM method and SGI Index as an indicator of groundwater drought

摘要: Previous studies of drought in Poland practically neglected the aspect of groundwater shortage, focusing on atmospheric, agricultural and hydrological drought. Therefore, the aim of this work was groundwater drought analysis in selected sites of South-Western Poland, based on the analytical methods used in other European countries. The intermediate objective was to assess the possibility of using the TLM method and the SGI for monitoring groundwater drought based on data from the National Geological Institute–National Research Institute. Investigations demonstrated that both methods gave results that complemented existing information on droughts in Poland in the last 30 years. Studies show that in the 1990s there was groundwater drought, not only atmospheric and agricultural drought described by Bąk and Łabędzki (2002), Bobiński, Meyer (1992, 1992), Bartczak (2014).