Cumulative impacts of road developments in floodplains |
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| Authors: | Lindsay Beevers Wim Douven Helmi Lazuardi Henk Verheij |
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| Institution: | 1. Department of Geography and Environmental Resources, Southern Illinois University, 1000 Faner Drive, Carbondale, IL 62901, USA;2. U.S. Geological Survey, Upper Midwest Environmental Center, 2630 Fanta Reed RD, La Crosse, WI 54603, USA;3. Department of Geography and Geology, Sam Houston State University, Huntsville, TX 77341, USA;4. Department of Geography, The University of Alabama, 204 Farrah Hall, Tuscaloosa, AL 35487, USA;1. Geography and Geology, Sam Houston State University, PO Box 2148, Huntsville, TX 77341, United States;2. Geography and Environmental Resources, Southern Illinois University, Mail Code 4514, Carbondale, IL 62901, United States |
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| Abstract: | This paper investigates the impact of differing road development strategies in floodplains for increasing levels of road expansion, focusing on hydraulic characteristics of floods such as water level, velocity and inundation duration and extent. Cumulative impacts are presented in term of both a resistant approach where road transport infrastructure has the secondary purpose of flood dykes and, a resilience approach that maintains the floodplain hydraulics through the use of flow through structures. Each method is examined in the context of road development in the Cambodian Mekong floodplain. Results indicate that resistance approaches necessitate higher levels of road structures, designed to higher technical specifications, whilst resilience approaches maintain the hydraulic character of floodplains but require the inclusion of well-designed flow through structures with localized scour protection. |
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