Determination of Deoxygenation Rate of Citarum River Water using Long Term Technique
Citarum River is a large river located in West Java Province. The current condition of the Citarum River is highly polluted, especially in urban areas. Utilization of river water quality models is one of the popular methods to support river recovery. The deoxygenation level is an important coefficient in the BOD-DO formula used in the water quality model. This study aims to determine the actual coefficient of the deoxygenation rate of the Citarum River water by using the long term technique. Sampling was carried out at 2 points which were considered to be able to represent the condition of the Citarum River. The laboratory analysis method used in the calculation of the deoxygenation rate uses the Thomas’ Slope Method and the empirical formula of Hydroscience. The results showed the value of the deoxygenation rate range (K1) using the Slope method as a whole that ranged from 0.33 to 0.56 per day. While the value of the deoxygenation rate ranges (K1) using the Empirical formula ranges from 0.37 to 0.46 per day. The overall BOD (La) range ranges from 44.03 to 55.03 mg/L.