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

Year 2019, Volume: 3 Issue: 2, 23 - 31, 01.12.2019

Kağan CEBE Can Elmar BALAS

Abstract

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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