SIMULATION OF GRADUALLY VARIED FLOW IN COMPOUND CHANNELS

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ZAHIRI A.

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Journal: Journal of Water and Soil Conservation Year:2010 | Volume:17 | Issue:4 Page(s): 181-190

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Title

SIMULATION OF GRADUALLY VARIED FLOW IN COMPOUND CHANNELS

Author(s)

ZAHIRI A. | Issue Writer Certificate

Keywords

GRADUALLY VARIED FLOWQ1

EXCHANGE DISCHARGE METHODQ3

COMPOUND CHANNELSQ2

Abstract

Great difference of flow depth and Manning's roughness coefficients in main channels and floodplains, generate a strong gradient of lateral velocity and hence, a lateral shear stress in the interface of the main channel and floodplain. This phenomenon increases the head loss in river system. Mathematical models which are currently used for water surface profile computations in rivers, e.g. HEC-RAS and MIKE11, neglect this mechanism. For taking into account this mechanism, the energy slope and energy correction factor should be modified in GRADUALLY VARIED FLOW computations. In this paper, using EXCHANGE DISCHARGE METHOD, the current procedure of GRADUALLY VARIED FLOW computations were modified for COMPOUND CHANNELS. Comparison of this method and HEC-RAS results in an experimental flume with heterogeneous compound section in case of drawdown profile, M2, showed that the accuracy of these methods are 95 and 84.5%, respectively.

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APA: Copy

ZAHIRI, A.. (2010). SIMULATION OF GRADUALLY VARIED FLOW IN COMPOUND CHANNELS. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 17(4), 181-190. SID. https://sid.ir/paper/156164/en

Vancouver: Copy

ZAHIRI A.. SIMULATION OF GRADUALLY VARIED FLOW IN COMPOUND CHANNELS. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2010;17(4):181-190. Available from: https://sid.ir/paper/156164/en

IEEE: Copy

A. ZAHIRI, “SIMULATION OF GRADUALLY VARIED FLOW IN COMPOUND CHANNELS,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 17, no. 4, pp. 181–190, 2010, [Online]. Available: https://sid.ir/paper/156164/en

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