Performance Evaluation of the Urban Drainage Network Structure Using the SWMM Model

Nurhamidah Nurhamidah, Ahmad Junaidi, Almer Hafiz Yogyantoro


The drainage channel system is an important factor in city planning. It controls runoff and prevents cities from flooding. The urban drainage design also contributed to the city planning in Padang, where the risk of flooding is very high. Belimbing Area is one of the neighborhoods in Padang that often floods because of the poor drainage channel system. This research aims to improve its drainage channel system by surveying parts of the Belimbing Area with a high risk of flooding and evaluating its drainage channels using EPA SWMM v5.1. Data such as drainage channel dimension, climate, and subbasin data are collected and simulated using the software. Rainfall data used for this research are 20 years from Koto Tuo Station and Gunung Nago Station. The distance between each station to the research area is 2.30 km for Koto Tuo Station and 3.30 km for Gunung Nago Station. The infiltration method used in the software is Horton's Method, which will provide the data by Infiltrometer. The result shows parts in Belimbing Area that cannot hold their runoff and which drainage channel overflows. Fortunately, there is no significant runoff or severe overflows, but the result does not match its existing situation. This might happen because of lots of trash and plants clogging the channel. This research will benefit the government and stakeholders to take action on the current situation by recovering Belimbing Area's drainage channel.


ID modelling; flooding; drainage; infiltration; Horton

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