Stream Water Quality Modeling in Ankara Metropolitan Area

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by R. Yücel Tokuz, Univ of New Haven, West Haven, United States,

Document Type: Proceeding Paper

Part of: Irrigation and Drainage:

Abstract: At the time this study was undertaken, untreated wastewaters from Ankara metropolitan area (capital of Turkish Republic) were being discharged directly into Ankara Creek and its tributaries. This study examined the adequacy of the proposed wastewater treatment systems, considering the projected population of the region and associated pollutional loads on the creeks. The stream gage data for the creeks studied were scarce, therefore, regression methods were utilized to extend the historical data using the data available for the other gage stations in and outside the study area. The historical stream flow data were then used to generate synthetic gage data to be included in water quality modeling. A modified version of the Streeter-Phelps equation was used to estimate dissolved oxygen concentrations in the creeks. The results showed that the proposed treatment systems will not be adequate to maintain a desirable (i.e., 4.0 mg/L) dissolved oxygen concentration in the Ankara Creek.

Subject Headings: Water quality | Rivers and streams | Hydrologic models | Water pollution | Urban areas | Hydrologic data | Streamflow | Dissolved oxygen | Ankara | Asia | Turkey

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