Techniques Used in an Urban Watershed Planning Study

Abstract
For planning level studies of urban flooding, it is important to obtain reasonable estimates of hydraulic performance and water quality improvements at a cost commensurate with the level of detail. The Buffalo District Corps of Engineers needed a planning-level study for a 1,400 acre (570 ha) flood-prone area in the City of Buffalo, New York. This planning study included: reviewing previous studies and models; and adjusting, refining and expanding an existing SWMM 3.0 model to SWMM 4.3. Improvements to the SWMM 4.3 model better reflected existing and proposed conditions. The proposed conditions included a diversion/storage plan. Hydraulic performance and water quality improvements resulting from the plan, were used to determine it’s economic viability.
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