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All Journal BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil
Tri Hayatining Pamungkas
Civil Engineering Study Program; Universitas Ngurah Rai; Jl. Kampus Ngurah Rai No.30, Penatih, Denpasar, Bali, Indonesia
Civil Engineering, Building, Construction & Architecture Transportation

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Integrated Urban Drainage Analysis for Flood Mitigation Using HEC-RAS 6.0: A Case Study of Kaliakah Village, Jembrana Regency Tri Hayatining Pamungkas; Ni Kadek Astariani; Putu Doddy Heka Ardana; I Kadek Oky Wahyudi Putra; I Wayan Diasa
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 14 No 1 (2026): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (January 2026)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v14i1.11557

Abstract

Kaliakah Village in Jembrana Regency faces seasonal flooding due to land use changes and inadequate drainage systems. Inundation frequently occurs, especially in the Cempaka Road area, as surface runoff and channel sedimentation increase. This study aims to evaluate the existing drainage channel's storage capacity and redesign its cross-section using HEC-RAS 6.0 software to accommodate the planned flood discharge for a 5-year return period. Hydrological analysis was conducted based on rainfall data with discharge calculations using the Rational method, while hydraulic evaluation was conducted through HEC-RAS modeling. The results showed that the planned flood discharge of 0.46 m³/second with a concentration time of 0.38 hours could not be accommodated by the existing channel, specifically at STA 0+100–0+300 which experienced overflow. Therefore, a redesign of the channel was carried out using a 60x80x120 cm U-ditch, which was proven to be able to accommodate the discharge safely and efficiently in an effort to mitigate regional flooding.
Co-Authors I Kadek Oky Wahyudi Putra I Wayan Diasa Ni Kadek Astariani Putu Doddy Heka Ardana