EFFECTS OF CANAL CONTRACTION ON LOCAL SCOUR AROUND ABUTMENT

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MAHTABI SHIRAZ GH.; HOSSEINZADEH DALIR A.; FARSADIZADEH D.; FAKHERIFARD A.; NAZEMI AMIR HOSSEIN

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Journal: JOURNAL OF AGRICULTURAL KNOWLEDGE Year:2007 | Volume:17 | Issue:3 Page(s): 1-12

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Title

EFFECTS OF CANAL CONTRACTION ON LOCAL SCOUR AROUND ABUTMENT

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Keywords

ABUTMENTQ3

CANAL CONTRACTIONQ3

CLEAR WATER SCOURQ3

LOCAL SCOURQ3

SCOUR DEPTHQ3

Abstract

ABUTMENT as a hydraulic structure is used in river training, river bank protection and agricultural land conservation. In spite of protecting river banks, ABUTMENT may face with scour phenomenon due to flow concentration particularly at the ABUTMENT nose. In order to investigate the effect of contraction ratio, some experiments were conducted using short wing-wall ABUTMENTs. The experiments were carried out in a clear-water condition at three different V/Vc values namely 0.9, 0.95 and 0.98. The results showed that relative dimensions of scour hole, including upstream length, downstream length and width of hole, decreased about 7, 36 and 24 percents with increasing CANAL CONTRACTION, respectively. Maximum SCOUR DEPTH occurred at the contraction ratio of 0.16 and beyond this limit, there was a reduction of up to 21.5 percents at the maximum SCOUR DEPTH. Maximum SCOUR DEPTH was also 3.27 times of the ABUTMENT length. Therefore, it may be concluded that in order to avoid contraction effect in a model ABUTMENT, the L/W ratio should be less than 0.16, otherwise SCOUR DEPTH decreases in respect to maximum SCOUR DEPTH.

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APA: Copy

MAHTABI SHIRAZ, GH., HOSSEINZADEH DALIR, A., FARSADIZADEH, D., FAKHERIFARD, A., & NAZEMI, AMIR HOSSEIN. (2007). EFFECTS OF CANAL CONTRACTION ON LOCAL SCOUR AROUND ABUTMENT. JOURNAL OF AGRICULTURAL KNOWLEDGE, 17(3), 1-12. SID. https://sid.ir/paper/28782/en

Vancouver: Copy

MAHTABI SHIRAZ GH., HOSSEINZADEH DALIR A., FARSADIZADEH D., FAKHERIFARD A., NAZEMI AMIR HOSSEIN. EFFECTS OF CANAL CONTRACTION ON LOCAL SCOUR AROUND ABUTMENT. JOURNAL OF AGRICULTURAL KNOWLEDGE[Internet]. 2007;17(3):1-12. Available from: https://sid.ir/paper/28782/en

IEEE: Copy

GH. MAHTABI SHIRAZ, A. HOSSEINZADEH DALIR, D. FARSADIZADEH, A. FAKHERIFARD, and AMIR HOSSEIN NAZEMI, “EFFECTS OF CANAL CONTRACTION ON LOCAL SCOUR AROUND ABUTMENT,” JOURNAL OF AGRICULTURAL KNOWLEDGE, vol. 17, no. 3, pp. 1–12, 2007, [Online]. Available: https://sid.ir/paper/28782/en

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