Seite - 467 - in Book of Full Papers - Symposium Hydro Engineering

of global warming for decades to come, due to the inertia of the climate system (Javornik, 2008). The growing awareness of the environment is transformed in the form of global pressure on the use of renewable and environmentally friendly energy sources. Hydropower as one of the environmentally friendly energy sources has an important role in facing the world policy in climate change. On the contrary, hydropower has a dependence on water availability conditions both spatial and time in optimizing its generation, which in this case refers to the operation of the reservoir. 2. CONFIGURATION AND POTENTIAL WATER RESOURCES The Citarum cascade reservoir operation cannot be separated from the Citarum River Basin system as a whole because the Citarum River has become a hydrological entity through the development of natural resources based on the Blommestein thought that unites the natural resource potential of the Ciujung River (Banten Province) to Kali Rambut (Pemali) (van Blommestein, 1949). This rationale is realized in the development of Citarum River through Jatiluhur Multipurpose Project with the construction of Jatiluhur dam and dam along with irrigation infrastructure so that the Citarum River with the surrounding rivers, from Ciliwung River to Cilalanang River into one hydrological unit as “Fig.1”. Fig.1 The Citarum River Basin with the surrounding rivers and part of the Ciliwung- Cisadane River Region becomes a hydrological unit. Extensive infrastructure development with the objective of meeting the water requirement for irrigation of 240,000 ha in the northern plains of West Java as the fulfillment of national food, raw water supply especially for DKI Jakarta in addition to the Regency / Municipal PDAM and industry, electricity generation, fishery, and etc. The development of natural resources in the Citarum River is done by optimizing the availability of water from the surrounding rivers, namely Ciliwung, Bekasi, Cikarang, Ciasem, Cigadung, Cipunegara, and Cilalanang as “Fig.2 “. Citarum cascade reservoir consisting of Saguling, Cirata, and Ir. H. 467