Sector Water Resources

Project Type Flood Control – River Improvement

Project Title Upper Citarum Basin Urgent Flood Control Project

Location Bandung, West Java, Indonesia

Client Director General of Water Resources / JBIC

Project Period July 1994 – March 2008

Dredging works for low water channel at Parunghalang

Reconstructed road bridge at Dayeuhkolot

Problems addressed by the Project

The Citarum River (the largest river in West Java which flows through the Upper Citarum Basin and then north¬wards to the North Java coast, East of Jakarta) has a catchment area of 6,000 km2. The Upper Citarum Basin (1,800 km2) suffers from recurrent flooding problems. The March 1986 flood covered a flood area of 7,450 ha with flood depths of 0.8 to 1.5 m in the Dayeuhkolot area, and caused exten¬sive damage to 27,310 houses and 480 industrial and commercial buildings as well as 6,360 ha of rice fields. Future flood damage is expected to worsen and increase with severity in the future, owing to the following: low discharge capacity of the Citarum River channel, increasing flood peak discharge due to rapid basin development, increasing population in flood-prone urban sprawl ar¬eas, etc. Since river improvement has a high priority among various infrastructural development programs in the basin, in order to relieve socio-economic growth problems by mitigating flood damage, the Government of Indonesia requested technical and financial assistance from Japan.

Service Period

Under the technical cooperation program that JICA extended to the Directorate General of Water Resources in 1987-1988, OC Global established an overall flood control plan consisting of structural and non-structural measures, and conducted a feasibility study to identify an urgent project corresponding to the components of the flood control plan. Thereafter, OC Global executed the detailed de¬sign for the urgent project in 1991-1992 and provided construction supervision services for it under JBIC financial assistance from 1994 up to 2008.

Actual Project Recommendations

The urgent project works covered river improvement totalling 67 km along the main stream of the Citarum River and its tributaries, and the establishment of a telemetering system for flood forecasting and warning activities. The major work component of the river improvement consisted of dredging/excavation of channels and construction of riparian structures as well as re-construction of bridges, since river improvement in a 5-year frequency scale adopts the dredging and widening method for composite channel section. Telemeter system, involving collecting real-time hydrological data from 7-water level and 8-rainfall observation stations, was established by strengthening and utilizing the existing system of the Saguling Hydropower Station.

LEGEND

: Project Area

: City

: River

: Reservoir

: Dam

N

JAKARTAJAVA SEA

BANDUNG

Project AreaA = 1.771 km2

KARAWANG

PURWAKARTA

CIRATA

CIANJUR

SAGULING

JATILUHURRESERVOIR

RESERVOIR

CITARUM RIVER

L = 67 Km

Project Area

RESERVOIR

River Improvement

JAVA SEA

: Improved River Reaches

BANDUNG

KOLOTDAYEUH