The Lower Anayari Catchment (LAC) groundwater system of the upper east region contributes substantially to the populace’s socioeconomic development. LAC is well distinguished for intense farming activities. This study sought to assess the quality and processes/activities that impact on the groundwater chemistry in the catchment. Forty-one (41) samples, comprising boreholes and hand-dug wells were sampled from six (6) prime communities (Kulwase, Manyoro, Mirigu, Nakolo, Paga and Pungu) for physico-chemical and stable isotopes analysis. Hydrochemistry, ionic ratios, principal component analysis (PCA), geostatistics and stable isotopes (δ 18 O and δ 2 H) approaches were applied to construe the hydrogeochemistry of the groundwater system. Utilizing PCA and geostatistics, two factors controlling groundwater quality were depicted as; (a) V1 - the dissolution of silicate minerals and (b) V2 - agrochemicals/domestic waste. Piper Trilinear plot identified two hydrochemical facies, namely, Ca-Na-HCO 3 and Na-Ca-HCO 3 . Cation exchange processes and silicate weathering/dissolutions are main drivers of the groundwater chemistry. Stable isotopes suggests groundwater in LAC is mainly of meteoric origin and a well-mixed system. However, few deviations of groundwater isotopic signatures from GMWL were observed suggesting evaporation before recharge or recharge occurring from an enriched source.

中文翻译：

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用于表征加纳上东区下阿纳亚里流域地下水质量和补给过程的水文地球化学和同位素评估

上东部地区的下阿纳亚里集水区 (LAC) 地下水系统对民众的社会经济发展做出了重大贡献。LAC 以密集的农业活动而著称。本研究旨在评估影响流域地下水化学的质量和过程/活动。从六 (6) 个主要群落（Kulwase、Manyoro、Mirigu、Nakolo、Paga 和 Pungu）采集了四十一 (41) 个样本，包括钻孔和手挖井，用于物理化学和稳定同位素分析。应用水化学、离子比、主成分分析 (PCA)、地质统计学和稳定同位素（δ 18 O 和 δ 2 H）方法来解释地下水系统的水文地球化学。利用主成分分析和地质统计学，控制地下水质量的两个因素被描述为：(a) V1 - 硅酸盐矿物的溶解和 (b) V2 - 农用化学品/生活垃圾。Piper 三线图确定了两种水化学相，即 Ca-Na-HCO 3 和 Na-Ca-HCO 3 。阳离子交换过程和硅酸盐风化/溶解是地下水化学的主要驱动因素。稳定同位素表明 LAC 的地下水主要来源于大气和混合良好的系统。然而，观察到地下水同位素特征与 GMWL 几乎没有偏差，这表明补给之前的蒸发或从富集源发生的补给。稳定同位素表明 LAC 的地下水主要来源于大气和混合良好的系统。然而，观察到地下水同位素特征与 GMWL 几乎没有偏差，这表明补给之前的蒸发或从富集源发生的补给。稳定同位素表明 LAC 的地下水主要来源于大气和混合良好的系统。然而，观察到地下水同位素特征与 GMWL 几乎没有偏差，这表明补给之前的蒸发或从富集源发生的补给。