Download FMA_Abstract_September_2-5,_2014_2D_Model_Co

FMA CONFERENCE, SEPTEMBER 2-5, 2014
SANTA CLARA, CA
2D Model Co-validation in an Unconfined Floodplain
Hassan Kasraie1, Richard Gleason1, David Laak1
ABSTRACT
Co-validating 2-dimensional floodplain models may be the only solution available in areas
where no observed data is available for calibration purposes.
This presentation will focus on co-validation of one- and two-dimensional models in an
area of Ventura County, California where limited or no data is available for calibration in
accordance with FEMA guidelines. Several key two-dimensional techniques such as HECRAS 2D (5.0 beta), RiverFlow2D (Plus), and FLO-2D (Pro) tools were utilized for this
purpose.
This serves as an effort to more accurately reflect the complexities of the system while
giving the Community a sense of comfort in understanding the results, and a higher level of
confidence in the accuracy of the numerical model.
Even though the models all solve the 2D equations, the model set up, mesh or grid
definition, and the manner in which they simulate physical features such as roads,
buildings, bridges, open or closed conduits, etc. vary greatly.
Model vs. Modeler. The modeler’s experience with complex hydrologic situations, and the
level of expertise with certain numerical models play a big role in the outcome of the model.
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1
Kasraie Consulting, Ventura, CA