Investigating the best low-Impact Development (LID) method for urban runoff management using Analytical Hierarchy Process (AHP) (Case study: Khomeinishahr)
Subject Areas : Water resource managementKamel Rezaei Adriani 1 , Majid Riahi Samani 2 , Moslem Gheibi Hajivar 3
1 - Department of Civil Engineering, Ti.C., Islamic Azad University, Tiran, Iran.
2 - Department of Civil Engineering, Kho.C., Islamic Azad University, Khomeinishahr, Iran
3 - Department of Civil Engineering, Ti.C., Islamic Azad University, Tiran, Iran.
Keywords: : Low Impact Development (LID), Urban runoff management, Analytical Hierarchy Process (AHP), Green roofs, Khomeinishahr,
Abstract :
Nowadays, familiarity with the risks of urban floods is essential due to the damaging effects they cause. Assessing and mitigating these risks is of great importance in urban management systems. The adverse effects of urban flooding, in terms of the severity of damage, can be compared to the losses caused by storms, droughts, earthquakes, and landslides. In recent years, Low Impact Development (LID) methods have been recognized as the best and most cost-effective solution for managing and reducing the negative impacts of urban flooding.
Although LID techniques are highly effective in managing surface water and preserving its quality, the optimal siting, implementation, and operation of these methods depend on climatic, geological, hydrological, economic, and other regional conditions. The objective of this article is to use the Analytic Hierarchy Process (AHP) to select the best LID method for managing urban runoff in Khomeinishahr.
In this study, fourteen criteria were selected from all available criteria and options for choosing the best LID method, based on the input of thirty expert specialists. After conducting pairwise comparisons between the criteria and alternatives, the results were transformed into a hierarchical analysis structure according to expert opinions. The findings, modeled using Expert Choice software, indicated that green roofs and infiltration trenches are highly effective in diverting, controlling, and utilizing runoff in Khomeinishahr.
According to the software results, green roofs were identified as the best option for the northern and northwestern parts of the city due to the high density of construction and built-up areas. Infiltration trenches should be implemented throughout Khomeinishahr, while constructed wetlands were determined to be the best solution for the southern part of the city due to the presence of gardens and agricultural lands.
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