International Journal of
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Research Article Volume 9 Issue 3
Modeling flood reduction effects of low impact development at a watershed scale: case study of Nekemte town
Habtamu Kebede Kelemework
Received: August 21, 2025 | Published: September 22, 2025
Citation: Kelemework HK. Modeling flood reduction effects of low impact development at a watershed scale: case study of Nekemte town. Int J Hydro. 2025;9(3):102-110. DOI: 10.15406/ijh.2025.09.00409
Abstract
With urbanization, a significant increase in the area of impervious surfaces has been observed, which means that stormwater is no longer an opportunity to infiltrate into the soil. This results in the accumulation of surface runoff and the congestion of the conventional drainage management system. To counteract these changes, implementing low-impact development (LID) practices in conjunction with traditional drainage systems is necessary. This study aimed to identify effective (LID) practices for reducing stormwater runoff and evaluate the performance of this practice for mitigating urban flooding, besides a conventional urban stormwater drainage system. The study results revealed that the maximum peak runoff reduction of 33.2% was achieved with the LID combination scenario, while the minimum reduction of 19.3% occurred in the LID storage scenario. This study highly recommends that using LID practices in urban areas, in addition to the existing conventional drainage conduits, is an effective solution for restoring the natural circulation of water in the environment and reducing flood peaks.
Keywords: conventional drainage, stormwater management model (SWMM), Low Impact Development (LID), Sustainable stormwater management
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