SURFACE FLOW, URBAN AND LAND-BASED POLLUTION LOADS IN DAVUTLAR BAY

Coastal areas are heavily influenced by human actions such as urbanization of natural and agricultural areas. Besides pollution loads in discharges of the urban and industrial wastewater, loads washed off from the land are the main sources of coastal pollution, both of which can have deteriorating effect for the environment. The point and non-point pollutants have become a growing concern for Davutlar bay, a tourism district in the eastern Aegean Sea urbanized in the last decades. In order to reduce the pollution in the bay, the construction of a wastewater treatment plant has started in 2013. In this study, the surface discharges from the surrounding basin towards the bay are modelled and the pollutants buildup in surrounding basin are calculated by using Environmental Protection Agency’s Storm Water Management Model (SWMM) for the year 2018 considering different landuses defined in the CORINE system. The wastewater pollutants, namely total suspended solids (TSS), biological oxygen demand (BOD), chemical oxygen demand (COD), total nitrogen (NT) and total phosphorus (PT); discharged from the urban area to the bay are calculated before and after the wastewater treatment plant began to operate in 2018. The effects of land-based pollutants and the reducing effect of the wastewater treatment plant for the coastal pollution are discussed in the projections for the year 2019.

Keywords:

Coastal Pollution, CORINE Runoff, Water Quality,

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