Slide Rule For Snow Fence Design

Author : Noriaki Ohara
Publisher :
ISBN 13 :
Total Pages : 61 pages
Book Rating : 4.:/5 (15 download)

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Download or read book Historical Winter Weather Assessment for Snow Fence Design Using a Numerical Weather Model written by Noriaki Ohara and published by . This book was released on 2017 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Snow fence is an effective hazard mitigation measure for the low visibility and low friction of the road surface under winter weather condition. Prevailing wind directions and snow precipitation data prepared by Dr. R. Tabler (the Tabler data) that are necessary for snow fence design have not been updated since the 1990s. This project provides new, seamless wind field and snow precipitation data under the adverse winter storm conditions during 1980-2014, using the Weather Research and Forecasting (WRF) model with North American Regional Reanalysis (NARR) data input. The simulated wind fields were successfully validated by using the observed data from airport sites and using the Tabler data. The WRF simulated precipitation data were assimilated to the observation-based PRISM data in order to obtain the accurate hourly snow precipitation data. Combining all the weather variables, the number of blowing snow events is found to be increasing despite the increasing air temperature because of the sufficiently cold winters of Wyoming. Finally, it was verified that the existing snow fence system is effective under the winter season prevailing wind since the simulation agrees with the Tabler data. However, it was also found that the simulated wind patterns during the blowing snow events can be quite different from the winter season average prevailing wind field. Moreover, the historical wind statistics indicated large deviations in wind direction along I-80.