There is little information about the availability of water in the Cerrado biome, the main agricultural frontier in Brazil, especially about groundwater, and this has compromised the region’s economic and social development, as well as environmental sustainability. The reduction of rainfall in this region, indicated by numerous climate models, may reduce aquifer recharge and, consequently, groundwater availability and sustainable development of the Cerrado biome. This study aimed to evaluate the impact of global climate change on groundwater recharge in a Brazilian Savannah watershed. Rainfall and water table depth data were recorded between 2007 and 2015. Based on these data, equations were developed relating the average monthly depth of the water table with the accumulated average monthly rainfall. From these equations, monthly average recharges considering the future climate estimates made by climate models (Eta-HadGEM2-ES and Eta-MIROC5) and Representative Concentration Pathway (RCP) scenarios (4.5 and 8.5) were calculated. In a pessimistic scenario (RCP 8.5), the average monthly groundwater recharge is decreasing in the beginning and in the end of the rainy season, indicating that there may be an increase in the dry season and, consequently, a reduction in water availability in the Cerrado biome region.

关于巴西主要农业前沿地区塞拉多生物群落中水的可用性的信息很少，尤其是有关地下水的信息，这损害了该地区的经济和社会发展以及环境的可持续性。许多气候模式表明，该区域降雨的减少可能会减少含水层的补给，从而减少地下水的供应和塞拉多生物群落的可持续发展。这项研究旨在评估全球气候变化对巴西萨凡纳流域地下水补给的影响。记录了2007年至2015年的降雨量和地下水位深度数据。基于这些数据，开发了将地下水位的平均每月深度与累积的平均每月降雨量联系起来的方程式。从这些方程式 考虑到气候模型（Eta-HadGEM2-ES和Eta-MIROC5）和代表浓度路径（RCP）方案（4.5和8.5）所作的未来气候估计，计算了月平均补给量。在悲观的情况下（RCP 8.5），在雨季的开始和结束时，每月的平均地下水补给量正在减少，这表明干旱季节可能会增加，因此，干旱季节的可用水量会减少。塞拉多生物群落地区。