EXPERIMENTAL STUDY ON THE EFFECTS OF ARTIFICIAL BED ROUGHNESS ON HYDRAULIC PARAMETERS OF SALINE DENSITY CURRENTS

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Varjavand Peyman; GHOMESHI MEHDI; Hosseinzadeh Dalir Ali; FARSADIZADEH DAVOOD

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Journal: Journal of Irrigation Sciences and Engineering Year:2014 | Volume:37 | Issue:3 Page(s): 95-105

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Title

EXPERIMENTAL STUDY ON THE EFFECTS OF ARTIFICIAL BED ROUGHNESS ON HYDRAULIC PARAMETERS OF SALINE DENSITY CURRENTS

Author(s)

Varjavand Peyman | GHOMESHI MEHDI | Hosseinzadeh Dalir Ali | FARSADIZADEH DAVOOD | Issue Writer Certificate

Keywords

LIFTING PHENOMENONQ2

CONCENTRATION PROFILEQ2

SALINE DENSITY CURRENTQ1

ARTIFICIAL ROUGHNESSQ1

ENTRAINMENT COEFFICIENTQ2

GRADIENT RICHARDSON NUMBERQ2

Abstract

Turbidity currents are often the main process for the transport and deposition of the sediments in narrow, alpine reservoirs. In this research, 63 experiments were performed to investigate artificial bed roughness effects on the SALINE DENSITY CURRENTs. Conic and Cylindrical shapes roughness with three heights were used. Velocity and CONCENTRATION PROFILEs were measured in 4 and 3 cross-sections, respectively. The results show that as the roughness height increases the velocity decreased and the density current body thickness also increased. Furthermore for a constant GRADIENT RICHARDSON NUMBER by increasing roughness height, the coefficient of entrainment was also increased. In the some experiments a special behavior was seen which effects on the velocity profiles. This behavior was named “LIFTING PHENOMENON”. This phenomenon was observed when blockage element is more than 10% and 14% for Cylindrical and Conic shapes, respectively.

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APA: Copy

Varjavand, Peyman, GHOMESHI, MEHDI, Hosseinzadeh Dalir, Ali, & FARSADIZADEH, DAVOOD. (2014). EXPERIMENTAL STUDY ON THE EFFECTS OF ARTIFICIAL BED ROUGHNESS ON HYDRAULIC PARAMETERS OF SALINE DENSITY CURRENTS. IRRIGATION SCIENCES AND ENGINEERING (JISE) (SCIENTIFIC JOURNAL OF AGRICULTURE), 37(3), 95-105. SID. https://sid.ir/paper/217167/en

Vancouver: Copy

Varjavand Peyman, GHOMESHI MEHDI, Hosseinzadeh Dalir Ali, FARSADIZADEH DAVOOD. EXPERIMENTAL STUDY ON THE EFFECTS OF ARTIFICIAL BED ROUGHNESS ON HYDRAULIC PARAMETERS OF SALINE DENSITY CURRENTS. IRRIGATION SCIENCES AND ENGINEERING (JISE) (SCIENTIFIC JOURNAL OF AGRICULTURE)[Internet]. 2014;37(3):95-105. Available from: https://sid.ir/paper/217167/en

IEEE: Copy

Peyman Varjavand, MEHDI GHOMESHI, Ali Hosseinzadeh Dalir, and DAVOOD FARSADIZADEH, “EXPERIMENTAL STUDY ON THE EFFECTS OF ARTIFICIAL BED ROUGHNESS ON HYDRAULIC PARAMETERS OF SALINE DENSITY CURRENTS,” IRRIGATION SCIENCES AND ENGINEERING (JISE) (SCIENTIFIC JOURNAL OF AGRICULTURE), vol. 37, no. 3, pp. 95–105, 2014, [Online]. Available: https://sid.ir/paper/217167/en

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