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Analisis Debit Banjir Rencana Menggunakan Metode Rasional di Jalan Karah, Kecamatan Karah, Kota Surabaya Bagaskara, Femas Putra; Wulandari, Esti; Safitri, Dika Ayu
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.58153

Abstract

Flooding along Karah Street, Karah District, occurs due to the insufficient capacity of the drainage channel to accommodate surface runoff. This study aims to analyze the existing capacity of the drainage system and to evaluate its adequacy against the design discharge based on hydrological data using HEC-RAS software. The research method employed is descriptive quantitative, consisting of hydrological and hydraulic analyses. The data include maximum daily rainfall, topographic conditions, and field observations of the drainage channel. The hydrological analysis determines design rainfall using the Gumbel distribution and calculates runoff discharge using the rational method. The hydraulic analysis is performed by modeling channel capacity with HEC-RAS to determine whether the cross-section can accommodate the design discharge. This study is expected to provide an overview of the current condition of the Karah drainage system and serve as a basis for planning improvements to increase channel capacity and reduce flood potential in the area. 
Analisis Perencanaan Saluran Drainase Sebagai Upaya Pengendalian Genangan Banjir di Kawasan JL. Adityawarman, Surabaya Saka, Candra Diri; Wulandari, Esti; Safitri, Dika Ayu
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.58302

Abstract

The recurring flooding problem in the Jl. Adityawarman area, Wonokromo District, Surabaya City, is caused by the existing drainage channels no longer being capable of accommodating stormwater runoff discharge. This study aims to analyze the design discharge of the drainage channels and evaluate the capacity of the existing drainage system in the area. The research employed a quantitative descriptive method through hydrological and hydraulic analyses. Maximum daily rainfall data for the 2016–2025 period from the two nearest rainfall stations were analyzed using the Thiessen Polygon method, Log Pearson Type III distribution, and the Rational method. The analysis results indicate design discharges of 5.244 m³/s for a 2-year return period, 6.619 m³/s for a 5-year return period, and 7.602 m³/s for a 10-year return period. The evaluation of the existing channel capacity showed that all 33 channel segments experienced overflow under all return periods, with capacities ranging from 0.36 to 4.92 m³/s. Therefore, an increase in the drainage system capacity in the Jl. Adityawarman area is required.