Analisis 1D – 2D Genangan Banjir pada Kawasan Perumahan Baturaja Permai, Kecamatan Baturaja Timur

Flooding is a problem that often found in cities, especially the rural areas of Baturaja Permai. When it rains, quantity river water exceeds its capacity or becomes too much, and there will be inundation caused by overflowing rivers. Factors natural events such as high rainfall intensity cause flooding, coupled with factors from human activities. This study aims to investigate flood characteristics developing an integrated model between hydrology hydraulics. The development this based on hydrological runoff using synthetic unit hydrograph method Soil Conservation Service (SCS), one-dimensional (1D) hydraulic for flow propagation macro drainage systems, two dimensions (2D) calculations if existing so experiences area HEC-RAS software. To required data Digital Elevation Model (DEM) was obtained measuring height land Total Station (TS) instrument analyzed ArcMap calculation direct designed 5-year return period. simulation results indicate Permai prone flooding depth 0.558 m - 4.692 peak discharge 15.6 m³/s at