Mining activities generate much wastes which degenerate into various geochemical components and affect the natural composition of surface water resources. They cause Acid Mine Drainage (AMDs) and influence the hydrochemical evolution of the hydrogeological systems. This study employed hydrochemical parameters to characterize and evaluate the effects of mine discharges on irrigation surface water in the mining district of Enyigba, SE Nigeria. Twenty-four water samples were collected from surface water sources used for subsistence irrigation farming and analyzed for pH, total dissolved solids (TDS), electrical conductivity (EC), sodium (Na⁺), potassium (K), calcium (Ca²⁺), magnesium (Mg²⁺), bicarbonate (HCO₃⁻), chloride (Cl⁻) and sulfate (SO₄²⁻), while various irrigation parameters including Soluble Sodium Percentage (SSP), Magnesium Adsorption Ratio (MAR), Sodium Percentage (Na %), Sodium Adsorption Ratio (SAR), Permeability Index (PI), Total Hardness (TH), Kelly Ratio (KR) and Electrical Conductivity (EC) were deduced. Result indicates hydrogeochemical trend of Cl⁻ > Mg²⁺ > Ca²⁺ > SO₄²⁻ > HCO₃⁻ + CO₃ > Na⁺ + K⁺, while hydrogeochemical facies from Piper Trilinear plot, Durov and Schoeller plots shows that the dominant ionic species are the Mg²⁺, Cl⁻, and SO₄²⁻. Irrigation parameters such as SSP, MAR, Na %, SAR, PI, KR and EC indicate that majority of water sample are very good to moderately suitable for irrigation. Five samples around Amorie and Ameka are within the hard category for TH, which could be attributed to the high concentration of dissolved magnesium and calcium ion in the area. Apart from mine discharges, rock water interaction also affects the composition of surface water resources of the area.

采矿活动会产生大量废物，这些废物会退化成各种地球化学成分，并影响地表水资源的自然组成。它们会导致酸性矿山排水 (AMD) 并影响水文地质系统的水化学演变。本研究采用水化学参数来表征和评估矿山排放对尼日利亚东南部 Enyigba 矿区灌溉地表水的影响。从用于自给灌溉农业的地表水源收集了 24 个水样，并分析了 pH、总溶解固体 (TDS)、电导率 (EC)、钠 (Na ⁺ )、钾 (K)、钙 (Ca ²⁺ )、镁 (Mg ²⁺ )、碳酸氢盐 (HCO ₃ ⁻)、氯化物 (Cl ^- ) 和硫酸盐 (SO ₄ ^2- )，而各种灌溉参数包括可溶性钠百分比 (SSP)、镁吸附率 (MAR)、钠百分比 (Na %)、钠吸附率 (SAR)、渗透率推导出指数 (PI)、总硬度 (TH)、凯利比 (KR) 和电导率 (EC)。结果表明Cl ^-  > Mg ²⁺  > Ca ²⁺ > SO ₄ ^2-  > HCO ₃ ^-  + CO ₃  > Na ⁺  + K ^{+ 的}水文地球化学趋势，而Piper Trilinear图、Durov和Schoeller图的水文地球化学相显示占主导地位离子种类是 Mg²⁺、Cl ^-和 SO ₄ ^2-。SSP、MAR、Na %、SAR、PI、KR 和 EC 等灌溉参数表明大部分水样非常适合灌溉。Amorie 和 Ameka 周围的五个样本属于 TH 的硬类别，这可能是由于该地区溶解的镁和钙离子浓度很高。除了矿井排放外，岩水相互作用也影响该地区地表水资源的组成。