Aplikasi Model Qual2kw Untuk Menentukan Strategi Penanggulangan Pencemaran Air Sungai Gajahwong Yang Disebabkan Oleh Bahan Organik (Aplication of Qual2kw Model to Determine the Strategy in Solving Gajahwong River Water Pollution Caused by Organic Matter)

摘要

Water quality modelling of Gajahwong River has been done using QUAL2Kw model for DO-BOD parameters. The dynamics of DO-BOD of the river on the existing conditions in 2011 has been investigated. Because of the load of pollutants in the rainy condition and no rain condition was different, then the predictions made on both conditions. QUAL2Kw modelling results for Gajahwong River in year 2011 showed that the BOD concentration of the river on both conditions has exceeded water quality standards class II. The simulation results showed that: (1) Housing construction that discharge its liquid waste into Gajahwong River on total discharge 0,1 m3/s with concentration of BOD 10 mg/L, increased the BOD and decreased the DO of Gajahwong River, and (2) Water quality management and organic pollution control of Gajahwong River can be done by a strategy of making communal WWTP in each district with reduction of the upstream BOD concentration to 2 mg /L.