Over exploitation for agricultural activities and consumption has depleted the groundwater resources of drought-prone northeast Mexico. Major ion concentrations along with δ¹⁸O_H2O, δ²H_H2O and d-excess values of shallow groundwater from the Cieneguilla Basin (near Tula) located at a distance of ∼200 km from coast of the Gulf of Mexico helped to contribute new data about drought vulnerability in this region through identification of the moisture source and groundwater recharge zone. Different degrees of rock-water interaction through gypsum, anhydrite and halite dissolutions and minor silicate weathering controlled the hydrochemistry. Stable isotopes yielded a least square regression and slope similar to the local as well as global meteoric water lines, indicating minimal effect of evaporation during the recharge as well as in the subsoil. Isotopic fractionations along with a digital elevation model demarcated the recharge zones at north and east of the basin, with altitudinal difference of ≥1000 m, and indicated that the recharge occurred through warm season moisture sourced from the Gulf of Mexico. Less frequent landfalling of tropical storms caused by warmer sea surface temperature, however, has reduced this rainfall over the last few decades. If the trend of global warming continues unabated, the depleted groundwater resources would trigger reduction in agricultural activities in this drought-prone region and lead to enhanced socio-economic challenges.

农业活动和消费的过度开发耗尽了易受干旱影响的墨西哥东北部的地下水资源。主要离子浓度以及 δ ¹⁸ O _H2O , δ ² H _H2O距墨西哥湾海岸约 200 公里处的 Cieneguilla 盆地（图拉附近）浅层地下水的 d-excess 值有助于通过识别水分源和地下水提供有关该地区干旱脆弱性的新数据充电区。通过石膏、硬石膏和岩盐溶解以及轻微的硅酸盐风化，不同程度的岩水相互作用控制了水化学。稳定同位素产生的最小二乘回归和斜率与当地和全球大气水线相似，表明补给期间和底土中的蒸发影响最小。同位素分馏结合数字高程模型划定了盆地北部和东部的补给带，海拔差异≥1000 m，并指出补给是通过来自墨西哥湾的暖季水分进行的。然而，由于海面温度升高导致热带风暴登陆频率降低，在过去几十年中减少了这种降雨量。如果全球变暖的趋势有增无减，枯竭的地下水资源将导致这个干旱多发地区的农业活动减少，并导致社会经济挑战加剧。