The water sources of the Sokoto Basin are mainly of interrelated origin. The groundwater is composed of old water recharged in different climate regimes and of recent meteoric water. The recharge source is influenced by both local and regional moisture circulation given the lower slope and intercept of the local meteoric water line (LMWL) relative to those of the global meteoric water line (GMWL) and distribution of the deuterium excess d from -20 to +14 ‰. The identified interrelated water sources were confirmed by variations in tritium measured between 4.9 and <0.4 TU. The groundwater and surface water were identified to be of mixed origin, consisting of interrelated and recent types. This depicts active recharge taking place across the basin. The groundwater recharge was established to be renewable; however, rational water exploitation should be exercised considering growing water demand with the corresponding population rise.

中文翻译：

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索科托盆地水源环境同位素特征——大气补给与停留时间作用的评价

索科托盆地的水源主要是相互关联的。地下水由在不同气候条件下补给的旧水和最近的大气水组成。鉴于局部大气水线 (LMWL) 相对于全球大气水线 (GMWL) 的坡度和截距较低，以及氘过量 d 从 -20 到 d 的分布，补给源受到局部和区域水分循环的影响。 +14‰。确定的相互关联的水源通过在 4.9 和 <0.4 TU 之间测量的氚变化得到证实。地下水和地表水被确定为混合来源，由相互关联的最新类型组成。这描绘了整个盆地发生的积极补给。地下水补给是可再生的；然而，