Measurement and evaluation of water pollution and coastal sediments in estuaries of Bandar Abbas

one of the problems that threatens coastal ecology is the entry of urban wastewater into the sea by estuaries. Discharge of wastewater into the four estuaries of Bandar Abbas pollutes the coast of the Persian Gulf, which is a priority for the development of management strategies to reduce the risk of pollution. In order to achieve this approach, the present study measured the physicochemical parameters of water and heavy metals in the sediments of the four estuaries of Bandar Abbas, including Sooro, Goursoozan, Shilat and Nakhle Nakhoda estuaries during four seasons in 2019 and Evaluated by pollution indicators. The results showed that the concentrations of DO, BOD, COD, TSS, Cd, Zn, NO3, PO4, detergent and oils in the four estuaries of Bandar Abbas were higher than the environmental standard. The difference in temporal and spatial distribution of water quality pollutants was significant at the level of 95% and its maximum was in Goursoozan and in terms of time in summer, spring, autumn and winter, respectively. The average pattern of heavy metal concentration in the sediments was Zn> Cu> Pb> Cd which mean concentrations was 103.20, 52.55, 19.95 and 0.611 mg/kg, respectively. The maximum metals were in Goursoozan and the evaluation of metal in sediments with Igeo, CF, mdc and PLI indices showed that Cd, Cu and Pb in four estuaries of Bandar Abbas, in the category of moderate to severe pollution. High concentrations of heavy metals indicated the impact of human activities, including the discharge of wastewater into the estuary.