Development a Distributed Rainfall-Runoff Model Configured for Use in Regional Scale and Real-Time Flood Forecasting: Case Study of Jakarta Metropolitan Area (Jabodetabek) (Prosiding Nasional)

Development of regional scale rainfall-runoff modeling system is essential for flood mitigation in a river-delta mega city, such as Jakarta Metropolitan Area, in terms of both designing flood management alternatives and real-time flood forecasting. To take consideration on this fact, Jabodetabek region needs the proposed assessment for better preparing to anticipate the flood disaster. Indeed, many studies have been conducted in Jabodetabek. However, this study offers a new approach by constructing a distributed kinematic-wave rainfall-runoff modeling system that is applicable ranging in scale from sub-catchment, river catchment, to regional. The model is able to deal with various spatial types of rainfall, topographical and soil properties, and hydraulic structures. It has high capability for simulating the hydrological responses of multi river catchments simultaneously, running at the same time. In addition, quantitative rainfall information from ground gauges and from the Global Satellite Mapping of Precipitation (GSMaP) were utilized for modeling of actual floods and their heavy rainfall, respectively. This newly developed rainfall-runoff modeling system and GSMaP product generally provided acceptable estimated heavy rainfall movements and simulated hydrographs at specific locations during the Jakarta floods in 2007, 2013 and 2014. Moreover, the model is planned to be further developed to provide forecasts of river flows (flood), water quality and climate change impact assessment. Dalam Prosiding Pertemuan Ilmiah Tahunan Masyarakat Limnologi Indonesia 2013, pp.469-492, 3 Desember 2013, Cibinong, Indonesia. Pusat Penelitian Limnologi, Lembaga Ilmu Pengetahuan Indonesia (LIPI), Indonesia.