In this study, eighteen sites at Jeddah coastal area, Red Sea, have been assessed for water quality status, depending on nutrients, metals, Chlorophyll-a (Chl-a) and physical variables during 2018 and 2019. The investigated parameters of the Water Quality Index (WQI) are temperature, pH, salinity, dissolved oxygen (DO), DO saturation, oxidizable organic matter (OOM), suspended particulate matter (SPM), Chl-a, ammonium, nitrite, nitrate, total nitrogen, reactive phosphate, total phosphorus, silicate, Zn, Fe, Mn Cu, Cd, Pb, and Ni. The results revealed that the pH values were slightly alkaline with a range of 7.85–8.20. The results of other parameters were as follow: salinity (36.95–42.61PSU), DO (5.22–6.67 mg/L), OOM (0.40–1.23 mg/L), SPM (12.39–21.5 mg/L), Chl-a (0.10–0.83 µg/L). The range of nutrients (μM) were 0.07–0.22, 0.45–1.47, 9.62–18.64, 23.31–57.65, 0.05–0.15, 0.55–2.78 and 2.54–5.51 for NH₄/N, NO₂/N, NO₃/N, TN, PO₄/P, TP and SiO₄/Si, respectively. Cluster analysis was used to classify the stations studied. From the current study, five clusters were found, indicating the need to perform cluster analysis in the water quality assessment process to confirm the durability and consistency of the data discovered in the current application.

在这项研究中，已经评估了红海吉达沿海地区的18个站点的水质状况，具体取决于营养素，金属，叶绿素a（Chl-a）和2018年和2019年的物理变量。调查的水参数质量指标（WQI）是温度，pH，盐度，溶解氧（DO），DO饱和度，可氧化有机物（OOM），悬浮颗粒物（SPM），Chl-a，铵，亚硝酸盐，硝酸盐，总氮，活性磷酸盐总磷，硅酸盐，锌，铁，锰，铜，镉，铅和镍。结果表明，pH值呈弱碱性，范围为7.85–8.20。其他参数的结果如下：盐度（36.95–42.61PSU），溶解氧（5.22–6.67 mg / L），OOM（0.40–1.23 mg / L），SPM（12.39–21.5 mg / L），Chl-a （0.10–0.83 µg / L）。营养素范围（μM）为0.07–0.22、0.45–1.47、9.62–18.64，₄ / N，NO ₂ / N，NO ₃ / N，TN，PO ₄ / P，TP和SiO ₄ / Si。使用聚类分析对所研究的站进行分类。从当前的研究中，发现了五个聚类，表明需要在水质评估过程中进行聚类分析，以确认在当前应用中发现的数据的持久性和一致性。