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Volume 15, Issue 4 (Winter-In Press 2026)
Disaster Prev. Manag. Know. 2026, 15(4): 3-3 |
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Meraji M, Yazdi J, Shahsavandi M, Aghayari J, Abdi A. Estimation of Flood Impacts on Urban Travel Time and the Associated Economic Losses. Disaster Prev. Manag. Know. 2026; 15 (4) :3-3
URL: http://dpmk.ir/article-1-797-en.html
URL: http://dpmk.ir/article-1-797-en.html
1- Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran.
2- Department of Water Resources Engineering, Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran.
3- Shahid Beheshti University, Tehran, Iran
4- Iranian Space Research Center, Iran.
2- Department of Water Resources Engineering, Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran.
3- Shahid Beheshti University, Tehran, Iran
4- Iranian Space Research Center, Iran.
Abstract: (12 Views)
In this study, floodplain modeling in urban streets and its impacts on traffic, as well as the estimation of indirect economic losses caused by increased travel time, were conducted for a region in northern Tehran. The two-dimensional hydrodynamic model MIKE21 with a 5-meter computational grid and a 1-meter digital elevation model was applied to an area of 41.44 km², including several main channels in northeastern Tehran. Model performance was validated at the channel scale using field instruments, including ultrasonic water level sensors and discharge measurements by the float method. Flood extents for return periods of 10 and 100 years were simulated, showing inundation areas of approximately 140 and 640 hectares, respectively. The maximum depth and velocity of flow were 1.89 m and 2.19 m/s for the 10-year flood, and 3.83 m and 4.15 m/s for the 100-year flood. To estimate travel delay costs, differences between maximum permissible highway speed under normal and flooded conditions, the average cost per hour of delay, and vehicle counts across different days of the week were considered. The daily losses due to travel delays on Imam Ali, Hakim, and Hemmat highways were estimated at 2.65, 1, and 1.1 billion Rials for the 10-year flood, and approximately 942, 371.4, and 810 billion Rials for the 100-year flood in 2023. These results highlight the significant impacts of flooding on transportation performance and the urban economy.
Keywords: Floodplain, Two-Dimensional Simulation, Economic Loss, Urban Traffic, MIKE21, Travel Delay
Type of Study: Research |
Subject:
General
Received: 2025/08/6 | Accepted: 2025/10/28 | ePublished: 2026/03/1
Received: 2025/08/6 | Accepted: 2025/10/28 | ePublished: 2026/03/1
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