Biology and Environmental Indicators Department, Central Laboratory for Environmental Quality Monitoring (CLEQM), National Water Research Center (NWRC), Cairo, Egypt.
Environ Monit Assess. 2022 Oct 10;194(12):862. doi: 10.1007/s10661-022-10350-y.
Ismailia Canal is one of the significant streams of the Nile River in Egypt. The study aimed to determine the water quality of Ismailia Canal based on the regional and seasonal variability of physicochemical parameters, irrigation criteria, and the irrigation water quality index (IWQI). It was observed that the physicochemical parameters were within the acceptable FAO irrigation limits. All cations and anions values were within the acceptable FAO limits for irrigation, except the potassium (K) concentrations were over the permissible irrigation limits. The one-way analysis of variance (ANOVA) suggested a significant seasonal variation in the canal's water quality concerning all parameters (p value ˂ 0.05). However, the regional variation among various sites was statistically insignificant (p value > 0.05). Statistical analysis was used to calculate the correlation coefficient between different parameters, and the study showed highly significant correlation coefficients between different pairs of water quality parameters. The correlation matrix showed that the pH significantly affected IWQI (r = 0.661). The irrigation criterion values for Ismailia Canal were good, and the WQI levels for irrigation utilization at all studied sites were satisfactory. Deterioration of water quality may occur due to industrial, municipal, and agricultural activities. Drainage water should be treated before being mixed with irrigation water to improve its suitability for irrigation.
伊斯梅利亚运河是埃及尼罗河流域的重要支流之一。本研究旨在根据理化参数的区域和季节性变化、灌溉标准以及灌溉水质量指数（IWQI）来确定伊斯梅利亚运河的水质。研究结果表明，理化参数均在 FAO 灌溉允许范围内。除钾（K）浓度超过允许灌溉限值外，所有阳离子和阴离子值均在 FAO 灌溉允许范围内。单因素方差分析（ANOVA）表明，运河水质在所有参数方面均存在显著的季节性变化（p 值<0.05）。然而，不同地点之间的区域变化在统计学上并不显著（p 值>0.05）。统计分析用于计算不同参数之间的相关系数，研究表明不同水质参数之间存在高度显著的相关系数。相关矩阵表明，pH 值对 IWQI 有显著影响（r=0.661）。伊斯梅利亚运河的灌溉标准良好，所有研究地点的灌溉利用 WQI 水平均令人满意。由于工业、市政和农业活动，水质可能会恶化。在将排水与灌溉水混合之前，应处理排水以提高其灌溉适用性。
