Sanjaya, Rukbandi (2025) Analysis of the potential application of infiltration-based low impact development (lid) technology using swmm software in the drainage system of the graha tirta complex area in Malang City / Rukbandi Sanjaya</p>. Diploma thesis, Universitas Negeri Malang.
Full text not available from this repository.Abstract
p The rapid growth of urban areas brings new challenges in water resources management especially in terms of surface runoff control. Changes in land function from natural infiltration areas to pavement areas coupled with the intensity of social and economic activities cause a decrease in the infiltration ability of rainwater. One concrete example of this problem occurs in the Graha Tirta Complex Malang City. Areas that were previously capable of infiltrating water have become impermeable due to the demands of the community for housing and business premises. As a result puddles often occur during heavy rains affecting the comfort and safety of residents and can damage infrastructure. In response to this challenge the infiltration-based Low Impact Development (LID) concept is offered as an innovative solution. LID seeks to mimic the natural processes of the hydrological cycle through increased infiltration of water into the soil and reduced surface runoff. Therefore this study aims to calculate the amount of surface runoff in the study area analyze the performance of the existing drainage system and evaluate the effectiveness of applying LID technologies namely bio-retention cells rain gardens and permeable pavement in reducing the volume and peak of stormwater runoff. This research used a case study-based quantitative-descriptive approach. Primary data was obtained through direct and indirect field surveys that included the physical condition of drainage channels and land cover characteristics. Secondary data were daily rainfall data for the last 15 years (2009-2023) from three rainfall stations in Malang City. Hydrological analysis used the Log-Pearson III distribution to determine planned rainfall as well as the Mononobe method to determine rainfall intensity and hourly rainfall distribution. Modeling of the existing drainage system and LID implementation scenarios used Storm Water Management Model (SWMM) 5.2 software. Infiltration parameters were determined based on the Green-Ampt model with adjustments according to the soil type of the study area. The performance of the drainage system was evaluated based on the comparison of runoff volume and peak discharge between the conditions before and after the application of LID. The simulation results showed that in the existing condition the surface runoff volume for the 2-year return period was recorded at 68 818 mm with a peak discharge of 1.40 m sup3 /s while at the 5-year return period it reached 91 962 mm with a peak discharge of 1.88 m sup3 /s. After the application of LID technology the runoff volume decreased to 63 979 mm and 86 973 mm for the 2 and 5 year return periods respectively a decrease of 7.03% and 5.43%. The peak discharge was also reduced to 1.24 m sup3 /s and 1.69 m sup3 /s with a percentage reduction of 12.06% and 11.05% respectively. These results show that the implementation of LID can contribute to reducing runoff although the scale of reduction is relatively limited. This finding also reflects the potential for further development of LID technology as an alternative to surface runoff control in dense residential areas while taking into account land limitations and physical characteristics of the area. /p
| Item Type: | Thesis (Diploma) |
|---|---|
| Divisions: | Fakultas Teknik (FT) > Departemen Teknik Sipil (TS) > S1 Teknik Sipil |
| Depositing User: | library UM |
| Date Deposited: | 08 May 2025 04:29 |
| Last Modified: | 09 Sep 2025 03:00 |
| URI: | http://repository.um.ac.id/id/eprint/399588 |
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