Assasment of flood hazard reduction in DKI Jakarta: Bendungan Hilir Village

Abstract

Jakarta has an essential function for Indonesia, apart from being the capital city of the country, Jakarta is also the center of the nation’s economy. However, the problem of flooding that occurs every year causes enormous material and immaterial losses. One of the metropolitan areas that is often hit by floods is Bendungan Hilir Village. This village is the meeting point between the Ciliwung River and the Krukut River. One of the causes of flooding is when the water level in both rivers is high, the water from the Krukut River cannot flow, so it overflows into the surrounding area. For this reason, this study will analyze the level of flood hazard and the effect of normalization of the Krukut River. The analysis was performed using the HEC-RAS, combining 1D and 2D modeling. In the upstream part, the Krukut watershed flood hydrograph is applied for a return period of 25 years with a peak discharge of 169 m3/s, and the normal depth will be used as the downstream boundary. The modeling is carried out in two conditions, they are the existing channel and the channel after normalization. Based on the model results it is found that normalization could reduce the flood hazard of Krukut river around 75%.

Spatial Modeling of Flood Prone Areas in Huamual Sub-district Seram Bagian Barat Regency Indonesia

“…f) Flood loss reduction: With proper spatial modeling, potential losses due to flooding can be minimized. By knowing the floodprone areas, people can avoid building infrastructure or property in these areas, thereby reducing financial and human losses (Taufik et al, 2022).…”

Spatial Modeling of Flood Affected Areas of Krukut River in Pela-Mampang Segment, South Jakarta, Indonesia

“…The plan flood modeling (flood hydraulic modeling) of return period Q2, Q5, Q10, Q25, Q50, Q100 was carried out in the Krukut River Pela Mampang Segment which is administratively located in Kebayoran Baru Sub-district, Petogogan Urban Village, RW 001 (RT 002, 003, 004, 005, 006, 013), RW 002 (RT 001, 002, 003, 004, 005, 006, 007, 010, 013, 014, 015), RW (RT 001,002,003,004,005,006,007,008,009,010,011,013,014,015) Floodplain modeling or hydraulic modeling and prediction of affected areas (Buildings and Roads) in the Pela Mampang Segment are very useful in future flood disaster risk management. Furthermore, inundation mapping will also accelerate policy makers and planners in developing flood mitigation measures (structural and nonstructural).…”

“…Flood risk reduction is part of river basin (WS)-based water resources management that must be planned and implemented in an integrated manner within a WS. Therefore, flood risk reduction must be part of each river basin's natural resources management, which needs to be regulated in a river basin management plan (Tingsanchali, 2012;Taufik et al, 2022). Strategies and policies must be in line with the existing regulations in Law.…”

“…The following are the four main benefits of the research: 1) More Resilient Spatial Planning: Through spatial modeling of flood-affected areas of the Krukut River, this research can provide in-depth insights into how floodwater flows could potentially affect different areas in the Pela-Mampang Segment. This information can be integrated in urban spatial planning, enabling the selection of safer locations for infrastructure and settlement development (Taufik et al, 2022). Sustainability and flood resilience can be integrated in spatial design, which in turn will help reduce the impact of disasters (Kusumastuti et al, 2015).…”

“…RW 007 (RT 005, 006,007, 008, 009), RW 008 (RT 001), RW 011 (RT 003, 004, 006, 009, 014, 015), RW 014 (RT 004). This research location was chosen based on data on the incidence of flood inundation due to the overflow of the Krukut River obtained from the Water Resources Office of the DKI Jakarta Provincial Government, where these RTs often experience flooding every rainy season.…”