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Article Type

Review

Subject Area

Oceanography

Corresponding Author

Ahmed A. Radwan

Corresponding Author ORCID

0000-0001-9507-4632

Abstract

El Mex Bay, located west of Alexandria City, is identified as a hot spot of pollution along the Mediterranean coast of Egypt. It is a large, shallow, and turbid water body of socioeconomic importance. However, El Mex Bay receives a large amount of untreated industrial wastewater, as well as agricultural runoff from different land-based sources.

A comprehensive environmental study was carried out seasonally during 2020-2021. To evaluate the effect of this discharged wastewater on the water quality of El Mex Bay.

The physicochemical parameters were measured at both the surface and near-bottom water at nine stations.

Principal component analysis indicated that the dissolved inorganic nitrogen is largely controlled by the water quality of the Bay. The pollution index was calculated based on standard and measured water quality parameters, which indicated that El Mex Bay is highly eutrophic and heavily polluted to different degrees. The residence time of El Mex Bay water fluctuated between 3.97 and 10.05 days in winter 2020 and spring 2020, respectively. Regarding sustainable development, improving the integrated management of water quality, raising agricultural efficiency, and preserving the environment. It is necessary to create a wastewater purification plant on the El Mex pumping station to benefit from it in many fields.

The study thus recommends the discharge of treated and recycling of anthropogenic wastes to control eutrophication and pollution.

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