9436

8718

كارشناسي ارشد

كشاورزي - سازه هاي آبي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1393

دوازده،122ص.:مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

حسين افضلي مهر

عليرضا عمادي، اسماعيل لندي

13/10/93

منوچهر حيدرپور ، بهزاد قرباني

مهندسي كشاورزي

ID8718

Bed Load Transport Mechanism in Babolroud River Meherdad Poorhosein poorhoseinm@yahoo com September 1 2014 Department of Water Engineering College of Agriculture Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiHossein Afzalimehr hafzali@cc iut ac irAbstract Sediment in the river are generally either situation bed load and suspended load transport Bedload is a part of sediment load which is carried along the bed river in three different patterns slide roll ing or jump Factors such as the characteristics of grain size grain density water temperature hydraulicflow and river s geometric parameters affect how the sediment is transports Due to the importance androle of sediment transport phenomena in various fields of engineering determination of sediment has longConsidered experts towards the river kind issues Measurements of sediment in rivers is usually taken assuspended load of which some percentage is always considered as bed load Direct measurement of bedload in the rivers has been rarely happened In this study Babolroud river is one of the perennial rivers ofthe Caspian Sea basin that has analyzed in three zone In this project by measuring data mapping flowvelocity the diameter of the bed particles the particle diameter of transport bed load Various parameterssuch as the slope of the river bed transitional bed load grain size of bed load Shear velocity through theboundary layer theory shear stress Shields parameter average velocity and flow discharge were calcu lated and the relationship between these factors was investigated on bed load transport Evaluation ofbehavior and different predictions in Shields parameter indicate rather than insisting on constant valuesreported is references by various authors We must be insist on one acceptable value through which themovement of particle is observed Finally the comparison of the water organization data with ours showsthat a statistical equation in power form between flow discharge and sediment discharge can be suitable In this regard two to three percent of Suspended load are allocation to bed load Also by reviews the em pirical and semi empirical bed load transport equations equations of Doboy Hassanzadeh and Rickingrecommended in the river In This project two empirical equation based on the linear relationship ob tained from the dimensionless hydraulic and geometric parameters were calibrated by other data It wasobserved that these parameters play an important role in the bed load transport The main objectives ofthis research which can be mentioned are the measure bed load transport evaluation of bed load transportmechanism Identifying the appropriate equations in Babolroud river Provide empirical linear equationfor bed load using measured data and calibrated by the data in the other watershed Key words Bed Load Shields Parameter Hydraulic and Morphological Parameters Haley Smithmachine Babolroud River

حسين افضلي مهر

عليرضا عمادي، اسماعيل لندي

منوچهر حيدرپور ، بهزاد قرباني