Planning The Flood Embankment Of Cimande River, Bandung Regency

Abstract

The Cimande River in Bandung Regency is prone to frequent overtopping, causing significant flood damage to adjacent residential and agricultural areas. This research details the planning and design of a flood embankment (levee) as a primary structural solution to mitigate this recurring flood risk. The planning process begins with a comprehensive hydrological analysis to determine the design flood discharge (e.g., Q50 or Q100) based on historical rainfall data and a selected frequency analysis method. Subsequently, a hydraulic analysis is conducted, utilizing HEC-RAS modeling, to simulate the water surface profile (WSP) along the river reach during the design flood event. This simulation is critical for determining the required minimum crest elevation of the embankment, which includes a necessary freeboard for safety. The core of the study involves the structural design of the embankment, including its cross-sectional geometry (crest width, side slopes) and a geotechnical stability analysis. This analysis, using methods such as Fellenius or Bishop, ensures the embankment's slope stability against failure under various conditions (e.g., steady-state seepage, rapid drawdown). The result is a complete technical design for a flood embankment that is both hydraulically effective and geotechnically stable.