RIVER WATER QUALITY MODELING BASED ON DO AND BOD PARAMATERS USING QUAL2KW SOFTWARE (CASE STUDY : WINONGO RIVER, SPECIAL REGION OF YOGYAKARTA)

R Rahmi^[1], N Marlina^2*, and S Rahmawati²

¹ Department of Environmental Engineering, Faculty of Civil Engineering and Planning, Universitas Islam Indonesia, Kaliurang KM 14.5, Sleman Yogyakarta, 55584, Indonesia

² Environmental Risk Analysis Laboratory, Department of Environmental Engineering ,Universitas Islam Indonesia, Kaliurang KM 14.5, Sleman Yogyakarta, 55584, Indonesia

[1]^* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol2.art13

ABSTRACT

The location of the study was on the 46.93 km Winongo River which passes through the Sleman Regency, Yogyakarta City, and ends in Bantul Regency. The Winongo River receives sources of pollutants such as domestic waste, agricultural waste, and fishery waste so river pollution occurs. The purpose of this study is to analyze the water quality of the Winongo River with point source and nonpoint source pollutant sources and obtain alternative strategies for Winongo river water quality management from the results of Qual2kw modeling simulations that can increase DO concentration and reduce BOD concentration. Based on the results of the study showed that the occurrence of pollution in the Winongo River, as evidenced by the average BOD concentration that exceeded the class II quality standard of 4.45 mg / L and the concentration of 5.38 mg / L. Simulation results of pollutant load modification and local oxygenation simulations were effective in increasing DO concentrations in the Winongo River. Meanwhile, the simulation of local oxygenation and simulation of modification of pollutant loads are effective in reducing BOD concentrations in the Winongo River.

Keywords : River Water; DO and BOD Parameters; Software

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