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<p>Sustainable management of groundwater recharge is crucial to ensure the availability and sustainable management of water and sanitation for all (Sustainable Development Goal 6). This study aims to further the understanding of how groundwater recharge is impacted by land use/land cover (LULC) and climate change. For this purpose, the groundwater recharge potential (GWRP) of the southern Brazilian volcanic plateau was delineated for two distinct periods. A methodology was adopted that combined the analytical hierarchy process and a geographical information system (GIS). It was based on lineament density, geology, slope, geomorphology, drainage density, soil depth, soil types, LULC, and annual rainfall data. As a result, despite an increase in precipitation, the GWRP zones experienced a decline of 700 km<sup>2</sup> between 1985 and 2022 within the study area. The primary factor influencing the observed changes in GWRP is LULC, mainly the conversion of forests and grasslands into agricultural lands. GIS proves to be a valuable tool for assessing the impacts of changes on watersheds, which necessitates continuous research, integrated analysis, and interdisciplinary approaches. These findings serve as an analog model for fractured aquifers, underscoring the need for a more comprehensive territorial management strategy to ensure the long-term sustainability of continental water resources.</p>

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Impacts of land cover and climatic changes on groundwater recharge on the volcanic plateau of Southern Brazil

  • 期刊论文

  • 发表日期：

    2025年10月14日

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  • Fabiane Wiederkehr,
  • Clódis de Oliveira Andrades-Filho,
  • Ana Maria Pimentel Mizusaki

摘要

Sustainable management of groundwater recharge is crucial to ensure the availability and sustainable management of water and sanitation for all (Sustainable Development Goal 6). This study aims to further the understanding of how groundwater recharge is impacted by land use/land cover (LULC) and climate change. For this purpose, the groundwater recharge potential (GWRP) of the southern Brazilian volcanic plateau was delineated for two distinct periods. A methodology was adopted that combined the analytical hierarchy process and a geographical information system (GIS). It was based on lineament density, geology, slope, geomorphology, drainage density, soil depth, soil types, LULC, and annual rainfall data. As a result, despite an increase in precipitation, the GWRP zones experienced a decline of 700 km2 between 1985 and 2022 within the study area. The primary factor influencing the observed changes in GWRP is LULC, mainly the conversion of forests and grasslands into agricultural lands. GIS proves to be a valuable tool for assessing the impacts of changes on watersheds, which necessitates continuous research, integrated analysis, and interdisciplinary approaches. These findings serve as an analog model for fractured aquifers, underscoring the need for a more comprehensive territorial management strategy to ensure the long-term sustainability of continental water resources.