Hydrological Drought Assessment in a Small Lowland Catchment in Croatia

Hydrological drought is critical from both water management and ecological perspectives. Depending on its hydrological physical features, the resilience level of a catchment to groundwater can differ that meteorological drought. This study presents comparison indices based levels 1987 2018. A small area in Croatia, consisting two sub-catchments with continental climate minimum land-use changes during observed period, was studied. The first analysis made standardized precipitation index (SPI) evapotranspiration (SPEI). results showed their very high correlation. correlation between (SGI) different time scales (1, 3, 6, 12, 24 48 months) values, but had highest value longest scale, months, for all observation wells. Nevertheless, behavior SPI (GW) more related characteristics. indices, such as SGI, should be applied judiciously because sensitivity geographical, geomorphological, topographical characteristics, even areas.