STUDY OF CLEAN WATER RESERVATION POTENTIAL FROM CISADANE RIVER FOR RAW WATER SUPPLY IN JAKARTA AND SURROUNDING

• Main Author: Afdhaliah, Nurul
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/58011
• Institution: Institut Teknologi Bandung

Water is main support for human life. In Indonesia, especially in Jakarta and its surroundings is one of regions concern to development of offshore reservoir from Cisadane river as an alternative for water daily need. Jakarta and its surroundings are densely populated which having growth population is highest every year. Besides, offshore reservoir is a solution for the lack areas to construct reservoir. This study aims to analyze the reservoir storage, to know the potential of water reservoirs/ponds for municipal of Jakarta and its surroundings need, also to know the lifetime of water reservoir. This study is carried out in several stages of research, hydrology analysis (water availability) used method of NRECA and FJ Mock, analysis of storage capacity (R Curve), analysis of need of municipal simulates in WEAP model as input in analyze reservoir storage using Ripple method. Reservoir Sedimentation transport analysis is applying sediment transport approaches: USBR, Einstein, Frijlink and Mayer-Pater and Muyer. Then lifetime of reservoir is analyzed with Brunee Method. This study shows validity level of NSE, R2 dan RMSE of NRECA model is 0.82, 0.79, 6.55 (NRECA half-monthly model). 0.82, 0.84, and 6.81 for monthly NRECA model. R-curve of ripple method of water reservoir in Cisadane Basin is able to accommodate up to 138.924.000 m3; it can maximize 141.600.000 m3; and 116.400.000 m3 when getting additional inflow from Cisadane dirty water reservoir. The WEAP simulation is based on the existing reservoir storage capacity layout, can distribute raw water to Jakarta and its surroundings up to 44% in wet years, 31.7% in normal years, and 25.8% in dry years in 2040, and reservoir lifetime is 100 years.