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1. Delineate watershed boundary for Silver Brook • Map based on flow directions, topography, and stormwater drainage systems from GIS. 2. SWMM Modeling - Current Conditions • Enter the Newark stormwater drainage system. • Enter precipitation data for selected storms. 3. SWMM Modeling - Future Conditions • Add stormwater park to replace Rodney Dorms, daylighting of Silver Brook, and enlarge pipe sizes. • Re-run model simulations to obtain results of modifications and determine where flooding occurs as compared to original model. Gemma Antoniewicz 1 , Norma Brasure 2 , Clare Sevcik 3, 1 Environmental Science Major, College of Earth, Ocean, and Environment 2 Environmental Engineering Major, Department of Civil and Environmental Engineering 3 Environmental Science Major, College of Agriculture and Natural Resources We would like to acknowledge UD WATER and The Delaware Water Resources Center for funding this project. In addition, we would like to thank the UD WATER team for their guidance and support throughout this project, especially: The UD WATER Project (Watershed Action Team for Ecological Restoration) is a university-wide initiative which seeks to develop management techniques to minimize the environmental impacts of stormwater runoff from campus. For more information, visit our website at www.udel.edu/water. Project Objectives The DWRC UD WATER Program: Silver Brook Watershed Plan Results Acknowledgements What is UD WATER? Methods Conclusions Figure 6.Norma Brasure (left) and Gemma Antoniewicz (right) observing the low flow and high flow drainage system at STAR campus. (Photo credit Clare Sevcik) Figure 1. Possible Silver Brook stream corridor through STAR campus. Gerald Kauffman (Director UD Water Resources Center) Andrew Homsey (UD Water Resources Center) Maria Pautler (Research Associate, Plant & Soil Sciences) Kelly Dinsmore (Water and Public Works Dept.) Stacey Chirnside (UD Dept. of Entomology and Wildlife Ecology) Dave Levandoski (1743 Holdings, LLC) Figure 4. The Silver Brook storm watershed with flooding during a 10-year storm with the size of the red highlight corresponding to the number of nodes that are flooded. Figure 5. The Silver Brook storm watershed with a proposed stormwater park (blue), enlarged pipes (orange), and daylighted stream (green) on the STAR campus. Flooding areas for a 10- year storm are highlighted in red. 0 20 40 60 80 100 120 140 160 24-Feb-16 2-Year Hurricane Sandy 10-Year 100-Year Flood Volume (10 6 gallons) Rain Event Differences Between Rain Events in Runoff and Flood Volumes Silver Brook Watershed, Newark, DE Total Runoff Total Flood Volume 0 1 2 3 4 100 106 209 214 217 274 276 277 278 280 282 283 285 295 Flood Volume (10 6 gallons) Node Total Volume of Node Flooding During a 10-Year Storm Event Silver Brook Watershed, Newark, DE Current Conditions Stream and Waterpark Stream, Stormwater Park, and Pipes Node 100 flood volume was 8.6 million gallons 0 5 10 15 20 100 106 209 214 217 274 276 277 278 280 282 283 285 295 Hours Flooded Node Total Number of Hours Flooded During a 10-Year Storm Event Silver Brook Watershed, Newark, DE Current Conditions Stream, Stormwater Park, and Pipes Figure 8. Total volume of runoff and flood volume from the 15 subcatchments within Silver Brook storm watershed for various flood events. Figure 9. Flood volume for the SWMM model in the Silver Brook storm watershed. Figure 7. Hours of flooding during 10-year storm event in the Silver Brook storm watershed. 1. Delineate storm watershed for Silver Brook. 2. Analyze the runoff within Silver Brook storm watershed by modeling its drainage system through use of the Environmental Protection Agency’s Storm Water Management Model (EPA SWMM). 3. Propose a plan to decrease flooding on UD Campus and surrounding City of Newark. 4. Assess reduction in flooding by modeling a stormwater park at the Rodney Dorms, replacing pipes, and daylighting Silver Brook on STAR campus. Figure 2. City of Newark proposed plan for stormwater park on the site of Rodney Dorms. Figure 3. Proposed landscape of daylighting.
