United States Department of Transportation
i
Removal Effectiveness of Co-mingling Off-site Flows with FDOT Right-of-Way Stormwater : [Summary].
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2017-11-10
[PDF-124.84 KB]
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Abstract:Because designers have many options in designing runoff systems, the researchers studied and simulated many scenarios. They considered five Florida regions, each with a characteristic rainfall pattern. For each location, assuming rainfall of one inch per hour, 75 simulations were run in order to consider the full range of runoff volumes, delay times before off-site runoff was allowed to enter the FDOT system, and the sizes of the chosen treatment facility. The primary forms of stormwater treatment considered were retention and detention ponds. Results from the simulations were incorporated in the BMPTRAINS software, which designers use to assist in the analysis and design of stormwater management systems. BMPTRAINS is used by all Florida water management districts and the Florida Department of Environmental Regulation. In the report, the researchers presented seventeen example design scenarios to demonstrate the use of BMPTRAINS in considering onsite and offsite runoff. One of these problems highlights a newly added BMPTRAINS feature: a cost analysis to aid in the decision to allow offsite flows to bypass or not to bypass an FDOT stormwater system. BMPTRAINS was also enhanced with expansions to the range of site conditions which can be considered.
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