Analysis of drainage dimension at the density of housing environment (case study: urban drainage at Gampong Keuramat, Kuta Alam, Banda Aceh, Indonesia)

Abstract

In the relatively flat area such as Banda Aceh, the effort to prevent flooding could be made by monitoring the drainage system. This study was conducted at Gampong Keuramat, Kuta Alam subdistrict, Banda Aceh, in which the area has been densely populated yet having uneven population distribution and experience the continuous increasing of less-planned residential area coverage as the rise in the number of immigration to the region. If not anticipated further, the condition could lead to flooding since the amount of water discharge to the drainage could be larger than the capacity of existing drainage. Thus, this study was conducted to analyze the capacity of existing drainage and to identify the cause of drainage inundation in the area. The study was focus on the part of the drainage that was not functioned normally, while Rational Method was used to analyze the channel discharge data. The result shows that the E-F channel and F-G channel are not in the safe condition since the channel discharge design is broader (0.06 m3/sec and 0.08 m3/sec, respectively) than the actual channel discharge (0.05 m3/sec and 0.07 m3/sec, respectively). Furthermore, those channels can be improved by increasing the slope and enlarging the channel’s dimension.