Hydro-Climate Symposium

Oral

395142 - Snowdrifts Prediction Modeling using a New Eulerian Particle Distribution Formulation

Wednesday, June 6
4:00 PM - 5:30 PM
Location: Lake Superior B

Snow redistribution is one of most important sources of uncertainty in snowmelt prediction during spring season because it causes considerable inequality in snow deposit pattern especially in open terrain under highly evolving climatic conditions. This study introduced a linear erosion term for a fetch-eddy effect to the classical advection dispersion equation. It was found that this new linear erosion term is essential to describe the particle deposit patterns behind an object including porous and solid snow fences and a tree. The new governing equation is named Eulerian Particle Distribution (EPD) equation. The snow stratigraphy observed by ground penetrating radar (GPR) was well reproduced by the one-dimensional numerical and analytical solutions of the EPD equation. This theory can inversely estimate the particle motion parameters, such as diffusion, drift, and erosion coefficients, from field observed particle distributions. It was shown that the EPD theory is an effective tool to characterize the particle motion processes under unknown flow regime and particle characteristics. Although the particle motion parameters may not be easily related from the flow or wind field at present time, there is significant potential to predict the snowdrift or any particle distribution under various landscape and weather conditions using this process-based formulation.

Noriaki Ohara, PhD

Assistant Professor
University of Wyoming
University of Wyoming

Noriaki Ohara received his B.Eng. and M.Eng. degrees in civil engineering from Chuo University, Japan, in 1997 and 1999, respectively, and his Ph.D. degree in civil engineering from the University of California, Davis, USA, in 2003. Since 2004, he has been an Assistant Development Engineer at the University of California, Davis. He is a member of the American Society of Civil Engineers (ASCE), American Geophysical Union (AGU), and the Japan Society of Civil Engineers (JSCE). Currently, he is an Assistant Professor in the Department of Civil and Architectural Engineering at the University of Wyoming.

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