STUDY ON THE EFFECT OF LAND-USE CHANGES OF MATRAMAN, TEBET, AND JATINEGARA AGAINST CILIWUNG FLUVIAL FLOOD RISK

• Main Author: Nugraha Adi Kesuma, Tri
• Format: Dissertations
• Language: Indonesia
• Subjects: Hak sipil dan politik
• Online Access: https://digilib.itb.ac.id/gdl/view/73683
• Institution: Institut Teknologi Bandung

Flood risk is an unavoidable problem in areas with potential flooding. The use of flood-prone areas as space for human activities increases the level of flood risk due to the emergence of additional life threats and losses due to flooding. The use of riverbank space as a built area often complicates the arrangement of flood infrastructure and reduces the level of flood handling capacity, as happened in the Ciliwung River channel. The increase in peak discharge due to land clearing and development in the watershed and the accumulation of garbage at the sluice gate increases the amount of discharge for the return period and increases the possibility of breach at the Manggarai Gate. The use of return period discharge and breach models at the Manggarai Gate is carried out to simulate the pattern of flooding that occurs in order to zone the flood threat. Flooding due to breach conditions at the Manggarai Gate transferred most of the high flood risk from the Setiabudi area to the Menteng and Jatinegara areas with an increase in inundation area of up to 259% of inundation area due to the discharge of the 100-year return period. The conversion of residential areas along the Ciliwung River into a 15m wide green belt can reduce the risk of flooding with a return period of less than 50 years, but cannot reduce the risk of flooding due to a return period of over 50 years and flooding due to a breach at the Manggarai Gate. Handling in the form of increasing physical capacity by building flood embankments can reduce the threat level of the study area in general, but displace flooding, and cause an increase in flood inundation in the Manggarai Village up to 200%. The transformation of parks and vacant land into retention ponds can reduce the area of inundation, but the availability of land in the study area causes the decrease to be not too significant, and still requires handling in the upstream part of the study area. The flood risk reduction scenario requires not only the construction of levees and infiltration ponds, but also the transformation of land-use settlements along the river to significantly reduce the risk of flooding.