Mamu basin is a major tributary of Anambra drainage basin and a reservoir for wastewater from agricultural and runoff processes within the basin. Water quality of the Mamu basin was evaluated to determine its suitability for potable water and agrarian uses. This study utilized 24 water samples collected during the rainy and dry season from the upstream and downstream segments of the sub basins within River Mamu. Hdyro-geochemical analytical results were employed in the evaluation of several water quality criteria such as QWI, SAR, TH, SSP, MAR, PI, KR, Na% and %E of the water from the basin. The results suggested that the surface water is unfit for ingestion when compared with the WHO and Standard Organization of Nigeria (SON) standards. However, the QWI result showed that 66.7% of the water samples are good for consumption in the rainy season, while 75% of the samples are classified unfit for drinking in the dry season. Parameters such as Fe²⁺, Mn²⁺, TDS, temperature and total coliform (p < 0.001) exhibited temporal variation unlike pH, EC, Ce, Ca²⁺, Mg²⁺, Cl⁻, K + , NO₃, PO₄³⁻, Na⁺, HCO₃⁻, Zn²⁺, TSS, SO₄, DO, BOD and turbidity which showed no response to season. Based on the results of SAR, TH, SSP, PI, KR, Na% and US salinity plots, the surface water is suitable for irrigation. Conversely, the MAR and %E results pointed out that water treatment is vital before use. The basin water is associated with permanent hardness due to CaCl₂ coupled with the dominance of Mg²⁺ and SO₄²⁻. Gibbs plots and Stiff diagram showed that geology and dissolution process have an influence on the water chemistry via weathering and rock–mineral interactions, while chemical ratios and correlation coefficients (R²) point on anthropogenic activities.

中文翻译：

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尼日利亚东南部马木河流域的水地球化学分析和地表水质量评价

玛木盆地是阿南布拉河流域的主要支流，也是该流域农业和径流过程废水的蓄水池。对马木盆地的水质进行了评估，以确定其对饮用水和农业用途的适用性。这项研究利用了在雨季和干旱季节从Mamu河子盆地上游和下游部分收集的24个水样。水力地球化学分析结果被用于评估几个水质标准，例如流域水的QWI，SAR，TH，SSP，MAR，PI，KR，Na％和％E。结果表明，与WHO和尼日利亚标准组织（SON）标准相比，地表水不适合摄入。但是，QWI结果显示，有66.7％的水样本适合在雨季饮用，而75％的样品被归为不适合在干燥季节饮用。铁等参数²⁺，锰²⁺，TDS，温度和总大肠菌群（p  <0.001）显示出随时间的变化不像的pH，EC，铈，钙²⁺，镁²⁺，氯^-，K +，NO ₃，PO ₄ ^3-，的Na ⁺，HCO ₃ ^- ，锌²⁺，TSS，SO ₄，DO，BOD和浊度这表明季节没有反应。根据SAR，TH，SSP，PI，KR，Na％和美国盐度图的结果，地表水适合灌溉。相反，MAR和％E结果指出水处理在使用前至关重要。CaCl ₂使盆中水具有永久硬度加上Mg ²⁺和SO ₄ ^2-的优势。吉布斯图和斯蒂夫图表明，地质和溶解过程通过风化和岩石-矿物相互作用对水​​化学产生影响，而化学比和相关系数（R ²）则指向人为活动。