چکیده مقاله
One of the most important problem that has become prominent in river engineering and water resources is to predict sediment load in alluvial channels Sediments are the production of erosion that are being transported using water, wind, ice, and gravity Accurate estimating the volume of sediments that a particular stream can transport, is one of the main subjects in river morphology Sediment transport estimation is widely studied and many experimental and semi experimental equations have been developed but depending on the hydraulic conditions and sediment characteristics in each river, some of these equations may yield better results than the others In this study, sediment transport estimator STE software was used for estimating bedload transport in the Qaresoo river located in Iran, Golestan province, in which bedload is measured In this software, the abilities of 55 bedload estimator equations were evaluated by using various equations for calculating shear stress and threshold sediment motion and the best combination of them for estimating bed load with the highest accuracy was found using the Genetic Algorithm The results showed that the best results were achieved by combination shear velocity and threshold shear velocity from Van Rijn 1984 and Hjulstrom 1935 , respectively Using this combination, the best bedload transport formula in the river studied is Chang et al 1965 with a 62 5% of discrepancy ratio between 0 5 to 2 and 0 91 as the average
کلیدواژهها
نویسندگان
Reza Teimourey
Ph D Candidate Department of Water Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Golestan, Iran
Amir A. Dehghani
Associate Professor, Department of Water Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Golestan, Iran
شیوه ارجاع
Teimourey, Reza and Dehghani, Amir A.,1400,Estimations of bedload transport using different shear stress and threshold sediment motion equations by using STE software,12th International River Engineering Conference
ارائهشده در
مجموعه مقالات دوازدهمین سمینار بین المللی مهندسی رودخانه4 بهمن 1400 · اهواز