Abstract
GIS Based Floodplain Modeling and Mapping, South Boulder Creek Track: Water Resources Author(s): Michael blongewicz, Eric Fontenot, Chad Kydum, jesper kjelds South Boulder Creek, Colorado, is at the center of a local floodplain controversy. Thirty years of regulatory floodplain studies were brought into question when due diligence research for a major land acquisition by the University of Colorado identified flooding problems. The West Valley, opposite the main creek corridor to the east, has not previously been mapped in the 100-year floodplain and is made up of neighborhoods near build-out that were developed without flood protection measures. As a result, public outcry demanded that a new adequately funded, technically objective and scientifically advanced flood mapping study be performed to fully and accurately define the flood problem. The presentation will focus on the steps taken to successfully complete the project with public consensus on the results. The steps include an ArcGIS software-based resource atlas, customized design storm development, flood frequency analysis, paleoflood observations, rainfall runoff modeling, linked 1D and 2D modeling, risk assessment and public involvement. Michael blongewicz DHI 319 sw washington st portland , OR 97204 US Phone: 5038275900 E-mail: mjb@dhi.us Eric Fontenot DHI 1440 Broadway Ste 614 Oakland , CA 94612 US Phone: 215 439 0013 E-mail: ejg@dhi.us Chad Kydum HDR INC 303 East 17th Ave, Suite 300 Denver , CO 80203 US Phone: 303.764.1583 E-mail: chad.kudym@hdrinc.com jesper kjelds DHI Water & Environment Agern Alle 5 Horsholm 2970 DK Phone: +45 4516 9200 E-mail: jtk@dhigroup.com |
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