EXPERIMENTAL STUDY OF SCOUR DEPTH AT 90 DEGREE RIVER CONFLUENCE

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GHOBADIAN R.; SHAFAEI BAJESTAN MAHMOUD

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Paper Information

Journal: IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING Year:2007 | Volume:1 | Issue:1 Page(s): 51-63

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Information Journal Paper

Title

EXPERIMENTAL STUDY OF SCOUR DEPTH AT 90 DEGREE RIVER CONFLUENCE

Author(s)

GHOBADIAN R. | SHAFAEI BAJESTAN MAHMOUD | Issue Writer Certificate

Keywords

RIVER CONFLUENCEQ3

SCOUR DEPTHQ3

DISCHARGE RATIOQ3

DENSIMETRIC FROUDE NUMBERQ3

POINT BARQ3

Abstract

River channel confluences form important morphological element of every river system that are characterized by complex pattern of three-dimensional fluid motion and the most highly turbulent locations in fluvial systems. Because of variation in velocity, discharge, turbulent and finely bed load in these location a scour hole is developed just downstream of the RIVER CONFLUENCE. These phenomena can accelerate the rate of bank erosion and affect the river morphology. Therefore it is necessary to clearly understand mechanism of sediment pattern in this location. In this study, first by using dimensional analysis, general non-dimensional equation were developed in which for the first time the DENSIMETRIC FROUDE NUMBER was included. Then the total of 55 experimental tests were conducted to investigate the effect of DISCHARGE RATIO, wide ratio and downstream DENSIMETRIC FROUDE NUMBER on depth scour at 90 degree confluence. The result of experimental test showed that the depth of scour at confluence increases with increasing of DISCHARGE RATIO and DENSIMETRIC FROUDE NUMBER whereas it decreases as width ratio increasing. It was found that SCOUR DEPTH is more related to the DENSIMETRIC FROUDE NUMBER. Finally, relationship was developed for prediction of SCOUR DEPTH.

Cites

EROSION AND SEDIMENTATION PATTERN AT THE SPUR DIKES ENDINGS ON THE FLOODPLAINS

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APA: Copy

GHOBADIAN, R., & SHAFAEI BAJESTAN, MAHMOUD. (2007). EXPERIMENTAL STUDY OF SCOUR DEPTH AT 90 DEGREE RIVER CONFLUENCE. IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING, 1(1), 51-63. SID. https://sid.ir/paper/134833/en

Vancouver: Copy

GHOBADIAN R., SHAFAEI BAJESTAN MAHMOUD. EXPERIMENTAL STUDY OF SCOUR DEPTH AT 90 DEGREE RIVER CONFLUENCE. IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING[Internet]. 2007;1(1):51-63. Available from: https://sid.ir/paper/134833/en

IEEE: Copy

R. GHOBADIAN, and MAHMOUD SHAFAEI BAJESTAN, “EXPERIMENTAL STUDY OF SCOUR DEPTH AT 90 DEGREE RIVER CONFLUENCE,” IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING, vol. 1, no. 1, pp. 51–63, 2007, [Online]. Available: https://sid.ir/paper/134833/en

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