TY - JOUR ID - 81019 TI - Experimental Study of the Effect of non-Submerged Rigid Vegetation on Flow Force in Symmetrical Rectangular Compound Channel by Direct Measurement Method JO - Iranian Journal of Soil and Water Research JA - IJSWR LA - en SN - 2008-479X AU - Maturi, ّFoad AU - Behdarvandi Askar, Mehdi AU - Ansari Ghojghar, Mohammad AU - Parsi, Ehsan AD - Graduated from Khorramshahr University of Marine Sciences and Technology, Master of Hydraulic Structures, Faculty of Marine Engineering AD - Assistant Professor, Department of Offshore Structures, Faculty of Marine Engineering, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran. AD - Department of Irrigation and Reclamation Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. AD - Study Expert, Arvand Water and Energy Consulting Engineers Company, Ahvaz, Iran. Y1 - 2021 PY - 2021 VL - 52 IS - 2 SP - 439 EP - 450 KW - Composite channel KW - direct measurement method KW - flow force KW - knife edge flume KW - vegetation DO - 10.22059/ijswr.2021.313776.668803 N2 - In this research, using direct measurement method, the flow pressure in the composite channel with vegetation has been measured. The vegetation used in this study was made of PVC. Five different diameters with values ​​of 20, 25, 30, 40 and 50 mm, two longitudinal distances of 12 and 15 cm and two transverse distances of 6 and 8 cm according to the regular and irregular arrangement and the location of vegetation as the proposed variables were used in this study. For direct measurement of force, a special type of hydraulic flume called "knife edge hydraulic flume" was used. Based on the results of the experiment, it was found that with increasing vegetation diameter, the flow force increases, which is due to increasing the volume and reduction of the cross-sectional area of the vegetation. In addition, due to the effect of longitudinal and transverse distances of vegetation, it can be said by increasing these distances, the flow force rate showed a decreasing trend. This is due to the reduction of vegetation volume and the secondary flows caused by vegetation cover. UR - https://ijswr.ut.ac.ir/article_81019.html L1 - https://ijswr.ut.ac.ir/article_81019_4c486797e98ac95ae552db9809fc85f8.pdf ER -