A Study of effect of floating vegetation on the formation of exchange flow

A Study of effect of floating vegetation on the formationof exchange flowAmir Heshmatifar1, Mirmosadegh Jamali 2Department of Civil Engineering, Sharif University of Technology, Tehran, IranAbstractThis study is concerned with the effect of floating vegetation on the exchange flow resulting from negative heat flux on open water by surface cooling. The problem configuration is comprised of two regions: open water and aquatic canopy area with floating vegetation. The negative heat flux resulting from night cooling, for example, makes a density difference between open water and canopy area, and hence drives an intrusion of warm water into the open region at the surface. Velocity distribution is measured by PIV method. The experiments are done for a range of vegetation density (0 to 15%) and r ...

The Effect of Movie Diction Guessing (MDG) on Iranian EFL learners’ Listening Skill

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CONSIDERATION OF SITE EFFECT IN NEAR FIELD STRONG GROUND MOTION

 PDF CONSIDERATION OF SITE EFFECT IN NEAR FIELD STRONG GROUND MOTION   Authors:[ Mohammad DAVOODI ] - Assistant Professor, International Institute of Earthquake Engineering and Seismology, Tehran, Iran,[ Seyed Saeed ZOLFAGHARI ] - Research Associate in Department of Geotechnical Earthquake Engineering,IIEES,Tehran,Iran   Abstract: Accelerograms recorded near active faults have some important characteristics that make them different from those recorded in far-fault regions. High-frequency components in acceleration records and longperiod velocity pulses are among notable specifications of such ground motions. Moreover recent investigations about site effect indicate seismic hazards during many disastrous earthquakes are observed to be aggravating at the sites with the soft ...