Ciliwung River Floodway Project Stalled for 6 Years: How Long is the River it Crosses?

Construction of the Ciliwung River diversion tunnel to the East Flood Canal (KBT) has resumed after being stalled for six years. Land acquisition is believed to have been the cause of the delay, as residents of Bidara Cina, East Jakarta, previously rejected relocation.

The Acting Governor of DKI Jakarta, Heru Budi Hartono, stated that land acquisition for the Ciliwung River diversion tunnel project has been completed. The construction of the tunnel is targeted for completion in April.

"It's finished, there's nothing left (regarding land acquisition). So, all land acquisition is complete, and physical construction is currently being finalized," said Heru, as quoted by *CNN Indonesia* on Thursday (26/1).

The government aims to complete the Ciliwung River diversion tunnel project in April 2023. The 1.3-kilometer tunnel connecting the Ciliwung River and the KBT will reduce the flood-prone area in DKI Jakarta to 211 hectares from the current 318 hectares.

The Ciliwung River diversion tunnel can reduce flood discharge by 63 liters per second (lps) when the Ciliwung River reaches Alert Level 1. At Alert Level 4, the water discharge in the Ciliwung River can be reduced by up to 33 lps.

According to a report by the Central Statistics Agency (BPS), the length of the Ciliwung River reached 21,660 meters in 2020. This river is the longest in DKI Jakarta, the same as the Grogol River.

On the other hand, the Ciliwung River covers an area of 515,600 square meters.

The following are the lengths of rivers/canals in DKI Jakarta:

1. Ciliwung: 21,660 meters
2. Kali Grogol: 21,600 meters
3. Sunter: 21,290 meters
4. Krukut: 18,370 meters
5. Cakung: 18,100 meters
6. Kalibaru Timur: 14,250 meters
7. Kalibaru Barat: 14,250 meters
8. Kali Cideng: 12,700 meters
9. Kali Pesanggrahan: 11,400 meters
10. Cipinang: 9,060 meters
11. Buaran: 8,800 meters
12. Ancol: 8,605 meters
13. Mookervart: 8,600 meters
14. Kali Angke: 4,350 meters
15. Banjir Kanal Barat: 3,650 meters
16. Jati Kramat: 3,270 meters
17. Cengkareng Drain: 2,950 meters