Presentation at the 1st Springer Conference: Advances in Science, Technology & Innovation IEREK Interdisciplinary Series for Sustainable
Development of the Arabian Journal of Geosciences (CAJG-1), Tunisia 2018.
Abstract:
This research presents a two-dimensional flood inundation modeling in urbanized areas where some features such as roads, buildings, and fences have a great effect on flood propagation. Wadi Qows located in Jeddah City, Saudi Arabia was chosen as the case study area because the flood occurrence of 2009 caused lots of losses either economic or loss of life. The WMS and HEC-RAS program was used for a hydraulic simulation based on channel geometry built by incorporating urban features into DEM using GIS effectively. A resampling method of DEM 90 × 90 m become 10 × 10 m grid cell sizes was conducted to produce a higher resolution DEM suitable for urban flood inundation modeling. The results show that a higher resolution leads to increasing the average flood depth and decreasing the flood extent. Although the change of the grid cell sizes does not affect its elevation values, this approach is helpful to perform flood simulations in urban areas when high resolution DEM availability is limited. In addition, the integration of WMS, HEC-RAS and GIS are powerful tools for flood modeling in rural, mountainous and urban areas.
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20 окт 2024
