Potential of east flood canal as provider of drinking water ecosystem services for DKI Jakarta

The increasing population and water pollution in DKI Jakarta by domestic waste causes raw water supply unfulfilled. The problem can be solved by utilizing one of the existing surface water in DKI Jakarta that is East Flood Canal (BKT). This research aims to analyze the quality, quantity, and continuity of East Canal Flood as water source for DKI Jakarta. The method used for water quality test is based on Indonesian National Standard (SNI) with raw water key parameters according to water class I and II Government Regulation No. 82 of 2001. BKT water quantity and continuity calculate based on the dependable flow capacity with a probability of 80% (Q80) accumulation the Cipinang River and diverted Ciliwung River. The results showed seven parameters exceeded the water quality standard class I and II Government Regulation No. 82 of 2001, ie BOD, COD, phosphate, nitrite, ammonia, total coliform, and faecal coli. The quantity and continuity of water in upstream BKT are available at minimum 1.49 m³/sec and the maximum 4.69 ^m3/sec when Cipinang River critical condition in August-September and the water volume in the Ciliwung River is excessive. To conclude, there is potency of BKT as ecosystem services provide drinking water for DKI Jakarta. (paper)