Storm Event Hydrologic Response in Metropolitan Baltimore, MD
Speaker: Brianne Smith, Graduate Student
Series: EEWR Brown Bag Seminars
Location: Engineering Quad E225
Date/Time: Friday, March 30, 2012, 12:00 p.m. - 1:00 p.m.
Urban flooding is a costly and sometimes life-threatening problem. This presentation takes an in-depth look at five-per-year urban flood events in metropolitan Baltimore. Focus is on nine small, approximately 10 km2, watersheds including seven urban basins and two non-urban basins. The urban basins vary in land cover / land use, stormwater management infrastructure, and other important characteristics. High-resolution discharge and radar rainfall data are used to examine the spectrum of urban storm event hydrologic response across these nine basins. Analyses focus on rainfall characteristics, response times, storage, flood clustering, and stormwater management. Preliminary watershed modeling work is also included. A watershed model of Dead Run is created using the Gridded Surface Subsurface Hydrologic Analysis model, a grid-based distributed hydrologic model. Modeling philosophy is presented and important model processes, including stream routing and infiltration, are highlighted. Initial results for a large flood event from a model of the DR-5 sub-basin of Dead Run are shown.