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- Using satellite data to monitor Groundwater drought in the Algarve regionPublication . Neves, Maria C.; Moreira, Elsa; Costa, LuisGroundwater drought presents significant economic and societal challenges, highlighting the need for effective monitoring and early warning systems at local and regional scales. Despite its vital role in water supply and irrigation, groundwater drought is often not adequately monitored in national operational systems. While the propagation of meteorological drought through hydrological systems has been extensively studied in various parts of the world, there is a lack of groundwater drought monitoring at an integrated basin-scale based on groundwater data. Long-term hydrological drought is often assessed using meteorological drought indices like SPI or SPEI with long periods of accumulation (12, 24 or 48 months time scales). However, most studies recognize that the accumulation periods necessary to achieve maximum correlation with groundwater observations exhibit high spatial variability due to the complexity of local hydrogeological conditions. This study aims to address this gap on groundwater drought monitoring in the Algarve by investigating the suitability of GRACE-based drought indices and ground-based drought indices derived from piezometer measurements for monitoring and predicting groundwater droughts.
- Modelling drought classes time series for groundwater drought assessment and prediction in Algarve regionPublication . Moreira, Elsa; Neves, Maria C.Log-linear quasi-association models have been successfully applied to analyze and predict drought class transitions derived from standardized precipitation index (SPI) time series in Portugal. This kind of model proved to be suitable for fitting the SPI drought transitions and is considered a reliable tool for capturing the dynamics of drought severity changes since it models the probabilities associated with transitions in drought severity over specific time periods. In the context of groundwater drought monitoring, the standardized groundwater index (SGI) is used and is computed from groundwater levels available from the SNIRH piezometric network. The aim is to employ similar models to model the transitions between SGI drought classes and use them to analyze and predict transitions in groundwater drought classes one or two months in advance. The purpose is also to evaluate the effectiveness of these tools in predicting short-term transitions in groundwater drought. The findings contribute to improving water management practices and enhancing early warning systems to mitigate the impacts of drought in the Algarve, with potential applications in other parts of the world.
- Congress session’s synthesis: Geodynamics and marine geological hazardsPublication . Neves, Maria C.CIESM Congress is an event that not only celebrates scientific breakthroughs but also bridges diverse cultures across the Mediterranean and Black Sea regions, by exploring a wide range of marine disciplines such as dynamics of phytoplankton, environmental toxicology, ocean biogeochemistry, marine biodiversity, sea level variability and coastal hydrodynamics, sustainable blue bioeconomy, microbial biotechnology, geodynamics and marine geological hazards, marine litter and nano/microplastics, climate change impacts, deep sea & extreme environments, aquaculture, ocean literacy, assessment of fishery resources, and Mediterra nean Straits.