The isotopic compositions of oxygen (δ 18O) and hydrogen (δ 2H) of precipitation were determined from three different locations in the western Niger Delta (Warri, Ughelli and Abraka) between 2014 and 2015. 18O and 2H in wet season precipitation were more depleted compared to the dry season. Similarly, d-excess computed for wet season precipitation is lower than that for the dry season. The δ 18O and δ 2H variations in precipitation suggest the effect of the convective system and north-easterly and south-westerly trade winds. The decrease in δ 18O and δ 2H was also observed in precipitation data of a continuous rain event of two successive days. The local meteoric water lines estimated for Warri, Ughelli and Abraka were δ 2H = 8.8 δ 18O + 9.1 ‰ (R 2 = 0.93), δ 2H = 6.9 δ 18O + 10.7 ‰ (R 2 = 0.98) and δ 2H = 7.9 δ 18O + 11.3 ‰ (R 2 = 0.87), respectively. The Niger Delta regional meteoric water line of δ 2H = 7.7 δ 18O + 10.2 ‰ (R 2 = 0.91) was derived from the monthly average from the three locations. The provided local meteoric water line for the Niger Delta from unweighted stable isotopic data represents a baseline for regional water resources studies.

中文翻译：

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尼日利亚尼日尔三角洲热带雨林区降水的稳定同位素组成

2014-2015 年尼日尔三角洲西部三个不同地点（Warri、Ughelli 和 Abraka）降水的氧（δ 18O）和氢（δ 2H）同位素组成测定。雨季降水中的 18O 和 2H 更耗竭与旱季相比。同样，为雨季降水计算的 d-excess 低于为旱季计算的 d-excess。降水中δ 18O 和δ 2H 的变化表明对流系统和东北和西南信风的影响。在连续两天的连续降雨事件的降水数据中也观察到δ 18O 和δ 2H 的减少。Warri、Ughelli 和 Abraka 的当地大气水线估计为 δ 2H = 8.8 δ 18O + 9.1 ‰ (R 2 = 0.93)、δ 2H = 6.9 δ 18O + 10.7 ‰ (R 2 = 0.98) 和 δ 2H = δ 7 18O + 11.3‰（R 2 = 0.87），分别。δ 2H = 7.7 δ 18O + 10.2 ‰ (R 2 = 0.91) 的尼日尔三角洲区域大气水线来自三个地点的月平均值。根据未加权的稳定同位素数据为尼日尔三角洲提供的当地大气水线代表了区域水资源研究的基线。