سال انتشار: ۱۳۸۸

محل انتشار: هشتمین سمینار بین المللی مهندسی رودخانه

تعداد صفحات: ۸

نویسنده(ها):

R Ghasemizadeh – Graduate Student, Civil Engineering Department, Sharif University of Technology,
M Jamali – Associate Professor, Civil Engineering Department, Sharif University of Technology

چکیده:

In this study, exchange flow between vegetation area and open water with exponential depth variation of density is investigated theoretically and
experimentally. A numerical model is used to obtain flow properties and their dependency on dimensionless vegetation drag parameter. Experimental studies were done in a laboratory flume with rigid cylindrical dowels as model vegetation. An exponential density difference profile in depth was produced to represent natural situation. The laboratory measurements were consistent with the numerical predictions. It is found that decrease in water turbidity or decrease in density of aquatic vegetation increases the intrusion velocity in both open and vegetated regions.