THE IMPACT OF WATERWAYS BED'S VEGETATION ON FLOW HYDRAULIC AND BED FORM

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EBRAHIMI NADERGHOLI; SHIRDELI AZIM; NIKKHAH JAVAN EBRAHIM; HOSSEINI MAJID

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Journal: WATERSHED ENGINEERING AND MANAGEMENT Year:2016 | Volume:8 | Issue:2 Page(s): 182-192

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Title

THE IMPACT OF WATERWAYS BED'S VEGETATION ON FLOW HYDRAULIC AND BED FORM

Author(s)

EBRAHIMI NADERGHOLI | SHIRDELI AZIM | NIKKHAH JAVAN EBRAHIM | HOSSEINI MAJID | Issue Writer Certificate

Keywords

EROSIONQ1

EXPERIMENTAL CHANNELQ2

DENSITYQ2

FLOW SUBSTRATEQ2

VEGETATIONQ2

Abstract

The riverbed and margin VEGETATION causes to increase in roughness against flow, decrease in average flow velocity, reduce water-energy, and alterations in layer velocity distribution (the flow velocity profile) across the river. In current experimental research, the effect of branching VEGETATION on the stream flow and bed formation is analyzed. The flow conditions are examined in EXPERIMENTAL CHANNEL with 7 meter length, 25 cm width and height through different flow rates (3, 5, 7 lit/s) and slopes under different(0. 001, 0. 003, 0. 005) and densities of VEGETATION (50, 25 and 12 percent). According to the processed data, it can be implicated that the difference between flow level, substrate, and rate is affected by the types of VEGETATION DENSITY; thereby existence of VEGETATION causes resistance to flow and depth increment. In all experiments, through the VEGETATION DENSITY increment, the bed EROSION increases compared with the primary condition in which the most and least alterations are observed in 50 and 12-percent DENSITY, respectively. In the condition of equal flow rate with DENSITY increment, the flow depth is increased. The bed particle displacement in the section covered by VEGETATION is increased through DENSITY increment in which flow level in 50 is more than 25 and 12-percent DENSITY, as well as, FLOW SUBSTRATE EROSION and alteration whereas sediment (particles accumulation) is appeared frequently under less DENSITY at the end of section covered by VEGETATION.

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APA: Copy

EBRAHIMI, NADERGHOLI, SHIRDELI, AZIM, NIKKHAH JAVAN, EBRAHIM, & HOSSEINI, MAJID. (2016). THE IMPACT OF WATERWAYS BED'S VEGETATION ON FLOW HYDRAULIC AND BED FORM. WATERSHED ENGINEERING AND MANAGEMENT, 8(2 ), 182-192. SID. https://sid.ir/paper/234639/en

Vancouver: Copy

EBRAHIMI NADERGHOLI, SHIRDELI AZIM, NIKKHAH JAVAN EBRAHIM, HOSSEINI MAJID. THE IMPACT OF WATERWAYS BED'S VEGETATION ON FLOW HYDRAULIC AND BED FORM. WATERSHED ENGINEERING AND MANAGEMENT[Internet]. 2016;8(2 ):182-192. Available from: https://sid.ir/paper/234639/en

IEEE: Copy

NADERGHOLI EBRAHIMI, AZIM SHIRDELI, EBRAHIM NIKKHAH JAVAN, and MAJID HOSSEINI, “THE IMPACT OF WATERWAYS BED'S VEGETATION ON FLOW HYDRAULIC AND BED FORM,” WATERSHED ENGINEERING AND MANAGEMENT, vol. 8, no. 2 , pp. 182–192, 2016, [Online]. Available: https://sid.ir/paper/234639/en

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