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Evaluasi Kinerja Sistem Drainase Menggunakan Metode Rasional Dan Persamaan Manning Pada Koridor Jalan Suluh – Jalan Pembangunan Iii Kota Medan Simaremare, Yessika Angelina; Jaya, Ardino Wira; Simanjuntak, Rizky; Prayogo, Wisnu; Harahap, Rumilla
Jurnal Ilmu Teknik Sipil Indonesia Vol. 2 No. 2 (2026): JITESNA - Juli
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/jitesna.v2i2.1385

Abstract

This study aims to evaluate the performance of the drainage system in the Jalan Suluh – Jalan Pembangunan III corridor in Medan City based on surface runoff discharge. The main problem that occurs is waterlogging during high-intensity rainfall due to inadequate channel capacity. The methods used include rainfall analysis using the Log Pearson Type III distribution, rainfall intensity calculations using the Mononobe method, runoff discharge calculations using the rational method, and channel capacity analysis using the Manning equation. The data used were rainfall data for the 2016–2023 period and direct field measurements. The results showed that the maximum runoff discharge of 1.63 m³/second was greater than the capacity of most drainage channels. Of the eight segments analyzed, only one segment met capacity, while the other seven segments were unable to accommodate the flow discharge. Based on these results, it can be concluded that the drainage system at the study site is not functioning optimally and requires improvements in the form of channel normalization and redesign of channel dimensions.
Geometric Characteristics And Sedimentation Analysis Of Urban Drainage Channels In Alumunium Raya Sinaga, Tiur Sari Tua; Jaya, Ardino Wira; Simanjuntak, Rizky; Prayogo, Wisnu; Harahap, Rumilla
Jurnal Ilmu Teknik Sipil Indonesia Vol. 2 No. 2 (2026): JITESNA - Juli
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/jitesna.v2i2.1386

Abstract

Urban drainage systems are crucial for managing surface runoff and preventing flooding in densely populated areas like Medan. However, rapid urbanization, population growth, and sedimentary layers often reduce the hydraulic capacity of these channels, which can lead to local flooding. The purpose of this study was to examine the geometric characteristics and sedimentation conditions of the drainage channels on Jalan Alumunium Raya Medan. This study used a descriptive-evaluative method that combined field surveys for primary data on nine observation segments with secondary data analysis in the form of rainfall and population statistics. The study found significant sedimentation with a height of up to 0.8 m, reducing the effective capacity of the channel.Geometric measurements indicate that the channel is between 1.0 and 1.55 meters wide and 0.45 and 1.4 meters deep. Analysis indicates that the projected population of 37,050 by 2025 and high annual rainfall (2,100–2,600 mm) both increase the amount of runoff the system must handle. The total sediment volume is 1,359.23 m³, and the flow rate is 1.94 m³/s. In conclusion, the current drainage system is not functioning properly and can cause flooding. To restore the effective capacity of the channel and ensure long-term urban water management, regular maintenance, sediment dredging, and normalization of the channel dimensions are essential.