RT Journal Article T1 Climate drought and resilience of karst hydrosystems in semi-arid regions: Case of the Dir of Beni Mellal Atlas (Morocco) A1 Qadem, Abdelghani A1 Moroșanu-Mitoșeriu, Gabriela Adina A1 Moreno Falcón, Mónica K1 Sequía K1 Clima K1 Marruecos AB This study examines climatic drought and the sustainability of karst springs in the Dir of Beni Mellal Atlas in Morocco, based on an analysis of precipitation, spring flows and hydrological breaks. Rainfall series were evaluated using the Standardised Precipitation Index (SPI-12), while multi-year variations in flow rates were analysed using baseflow and the CUSUM test. The results reveal high hydroclimatic variability marked by alternating dry and wet years, with a clear trend towards more frequent and intense dry spells since the 2000s. The CUSUM analysis shows a persistent cumulative deficit, reflecting progressive aridification and a decline in the resilience of karst systems. Karst springs show different responses depending on their location and hydrogeological structure, highlighting the importance of local characteristics in flow dynamics. This study highlights the complementarity of the SPI-12 and CUSUM indicators in assessing both the intensity of droughts and their accumulation, providing essential tools for the sustainable management of water resources in semi-arid areas of Morocco. PB EDP YR 2026 FD 2026 LK https://hdl.handle.net/10433/25893 UL https://hdl.handle.net/10433/25893 LA en NO Abdelghani Qadem, Gabriela Adina Moroșanu-Mitoșeriu and Mónica Moreno Falcon "Climate drought and resilience of karst hydrosystems in semi-arid regions: Case of the Dir of Beni Mellal Atlas (Morocco)" in International Conference on Water Resources and Environmental Studies (ICWES 2025) Fez, Morocco, October 28-29, 2025 L. Benaabidate, M. Zemzami, J. Naoura and B. Layan (Eds.) Published online: 15 January 2026 DOI: https://doi.org/10.1051/bioconf/202621101018 NO Universidad Pablo de Olavide. Departamento de Sistemas Físicos, Químicos y Naturales DS RIO RD May 9, 2026