WATER QUALITY MODELING USING QUAL2KW (CASE STUDY : CILIWUNG RIVER)

• Main Author: TRIANE, DESY
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/26524
• Institution: Institut Teknologi Bandung

<p align="justify">Abstract: : Ciliwung Watershed management is one of the policies program belong to government that is included in one of Millenium Development Goals (MDGs) with its priority is to manage and recover Ciliwung river functions and water quality. Ciliwung River has social and economic function for citizen of West Java and DKI Jakarta. The river length is about 129 km and its watershed area is 331,84 km². Quality standards established for the value of DO as class III is 3 mg / L. BOD parameter in most observation points within segment 1-6 have exceeded quality standards established for Class III which is 6 mg/l. BOD values fluctuate in range between 0.1 mg /l up to the highest point of 14.5 mg / L at Km 126.5. Two biggest pollutant loads for BOD generation in segment 4 and 5 are 13577.5 kg/d and 28180.9 kg/d. Dispersion simulation of pollutants was carried out by QUAL2Kw and it is completed by numerical formula and steady state models. Calibration results for value of k1 and k2 in segment 1 are 0.3 l/d and 0.4 l/ d, segment 2,3, and 4 are 0.35 l / d and 0.4 l/ d, and segment 5 and 6 are 0.12 l/d and 0.45l/d. Model projections are done for period of 20 years i.e. 2015 - 2035. Increasing of BOD pollutant load were retrieved in every 10 years on all river segments. Stages of water quality management were conducted from segment 2 to 6, with the fulfillment of class III water quality criteria in 2025 on stage I and stage II in 2035. Communal system is the most effective and efficient system to reduce BOD up to 6 mg / l in 2025. As for 2035, with addition of a communal system and domestic wastewater, it can reduce BOD pollutant load to quality standards of Class III.<p align="justify">