Jakarta flood is a routine event. It occurs annually in rainy seasons while extreme flood
takes place approximately every five years. Various factors, from natural to man-induced and
technical to non-technical ones, are involved in causing the detrimental impacts of the flood.
Among those factors, the existence of Ciliwung as the main river flowing across Jakarta leads to
the complication of the problem. This study analyzed the main hydrologic parameters, i.e. rainfall
and river discharge in Ciliwung’s catchment area, to assess the extreme floods in Jakarta. Three
extreme flood events, i.e. two events in 1996 and one event in 2002 were analyzed based on the
rainfall data at five stations overall area of Jakarta and river discharge at four stations along
Ciliwung. The result of analysis revealed the factors of main causes of the extreme events.
Furthermore, it is expected that by considering the past record of similar events in various study
reports, precautions could be developed to anticipate predictable impacts from such events in the
future, and recommendations could be provided as alternatives to overcome the problem.