POLDER PLANNING AS A FLOOD CONTROL IN THE DOWNSTREAM OF KRUKUT RIVER TANAH ABANG DISTRICT JAKARTA

• Main Author: RIFDAH TAUFIK, SALSABILA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/55800
• Institution: Institut Teknologi Bandung

Since 1621, 1654, until 1909 Jakarta has experienced flooding, although the condition has not experienced land degradation as it is today. This shows that geographically DKI Jakarta is a natural flood prone area because 40% of the entire area has an elevation lower than sea level, one of the locations that is often hit by floods is the downstream area of Krukut River such as Bendungan Hilir and Karet-Tengsin Subdistrict. Flood control efforts carried out downstream of Krukut River are by implementing a polder system. This solution was chosen because the flooding at the study site was caused by the drainage capacity, both micro and macro, which could not accommodate the flood volume and at certain times when the water in the Ciliwung River was higher than the Krukut River, the flood could not be discharged by gravity, thus requiring a pump. The components contained in this polder are the drainage network and the pump house. The planning process begins with hydrological analysis to process rainfall data into flood hydrographs for a 100-year return period. Furthermore, hydraulic analysis is carried out to make simulations with several scenarios which in this study there are 3 scenarios. The best scenario is scenario C, namely by normalizing the river and building a pump house equipped with 6 pump units with a capacity of 30 m3/s/unit. The next stage is to determine the pattern of operation and maintenance of each planned infrastructure so that the polder system can function properly until the specified service life. Calculation of the volume of work is done to get a draft budget. The total cost needed to build a polder is Rp. 103 million.