Performance Evaluation of the Flood Discharge Based Cantilever Retaining Wall Plan as Flood Mitigation Infrastructure of the Sumber Pinang River
Year: 2026
Type: article
Abstract: River flooding can increase hydraulic pressure and accelerate cliff erosion, so protection infrastructure that has adequate stability is needed. This study aims to evaluate the performance of cantilever retaining walls based on planned flood discharge as an alternative to flood mitigation in the Sumber Pinang River, Pasuruan Regency. The research uses a quantitative approach through hydrological and geotechnical analysis. Planned rainfall is analyzed using Gumbel and Log-Normal distributions, while flood discharge is calculated using the Rational method. Furthermore, the cantilever-type reinforced concrete retaining wall was planned and evaluated on bolstering, sliding, uplift, eccentricity, and bearing capacity of the foundation based on SNI criteria. The analysis yielded a planned flood discharge of 1,761 m³/s at 50 years. The walls are planned with an effective height of 4.0 m, a base width of 6.0 m, a guard height of 0.5 m, and a shear key of 3.0 m. The safety factor for the bolster is 16.90 and the shear is 14.675. The eccentricity of 0.61 m still meets the limit, with a maximum foundation stress of 26.9 kN/m² and a minimum of 6.5 kN/m². The retaining wall meets the stability requirements and is worthy of consideration as an infrastructure for cliff protection and flood mitigation of the Sumber Pinang River.
Source: Elemen Jurnal Teknik Sipil
Institution: Universitas Islam Majapahit
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W7219252162