Analisis Perencanaan Saluran Drainase sebagai Upaya Pengendalian Genangan Banjir di Kawasan Jl. Adityawarman Surabaya. (Analysis of Drainage Channel Planning as an Effort to Control Flood Inundation in the Jl. Adityawarman Area, Surabaya).

Saka, Candra Diri (2026) Analisis Perencanaan Saluran Drainase sebagai Upaya Pengendalian Genangan Banjir di Kawasan Jl. Adityawarman Surabaya. (Analysis of Drainage Channel Planning as an Effort to Control Flood Inundation in the Jl. Adityawarman Area, Surabaya). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.

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Abstract

Jl. Adityawarman, Wonokromo District, Surabaya is a flood-prone area due to the city's relatively flat topography, high seasonal rainfall, and the expanding impervious surfaces resulting from dense residential and commercial settlements. Recurring flood events in this area have caused severe traffic congestion, vehicle damage, and disruption to economic activities, indicating insufficient capacity of the existing drainage system. This study aims to analyze the design discharge for return periods of 2, 5, and 10 years, evaluate the capacity of the existing drainage channels, and determine channel dimension improvement alternatives using HEC-RAS software. Hydrological analysis was carried out using the Log Pearson Type III distribution method based on 10 years of rainfall data from three rainfall stations processed using the Thiessen Polygon method, while hydraulic analysis was performed using the Manning equation based on field-measured channel geometry data at 33 cross-section stations (STA), subsequently modeled in HEC-RAS under steady flow conditions. The results show design discharges of 2.350 m³/s for the 2-year return period, 3.221 m³/s for the 5-year return period, and 3.826 m³/s for the 10-year return period. The existing drainage channels were found to be incapable of accommodating the design discharge across all return periods reviewed, with an average existing channel capacity of only 1.961 m³/s along the 33 STA. Model validation using RMSE yielded a value of 0.015 m/s with an nRMSE of 9.49%, which falls within the very good category (< 10%). Through six iterations of trial and error simulation in HEC-RAS, the recommended channel dimensions of base width B = 2.0 m and height H = 2.5 m were obtained as an improvement alternative capable of accommodating the design discharge for the 10-year return period across all 33 STA under review.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Drainage, Hydrological Analysis, Hydraulic Analysis, HEC-RAS, Flood, Jl. Adilyawarman Surabaya
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Fakultas Teknik > Program Studi Teknik Sipil
Depositing User:	1432200002 Candra Diri Saka
Date Deposited:	27 Aug 2026 02:38
Last Modified:	03 Sep 2026 03:25
URI:	http://repository.untag-sby.ac.id/id/eprint/47643

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