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    Fluctuating Frequency of Live Bed Scour Depth around Submerged Weirs at Equilibrium Stages

    Source: Journal of Hydraulic Engineering:;2022:;Volume ( 148 ):;issue: 004::page 06022001
    Author:
    Dawei Guan
    ,
    Lu Wang
    ,
    Li Ma
    ,
    Bruce W. Melville
    DOI: 10.1061/(ASCE)HY.1943-7900.0001972
    Publisher: ASCE
    Abstract: Previous studies have primarily focused on the estimation of equilibrium scour depths around weirs, while overlooking the details of the temporal evolution of the live bed scour process of submerged weirs at the equilibrium stage. This study aims to investigate the relationships between fluctuating frequencies of the approaching bedforms and live bed scour depths around submerged weirs. The average fluctuating frequencies of approaching bedforms, upstream scour depth, and downstream scour depth are quantified from measured topographic time-series data. The frequency of upstream scour depth variations is found to be almost the same as that of bedforms, while the fluctuating frequencies of the scour depth variations downstream of the weir are found to be 0.38–0.68 times the approaching bedform frequencies in the scour equilibrium stage. New empirical equations are proposed to predict the fluctuating frequencies of live bed scour depth variations in the scour equilibrium stage.
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      Fluctuating Frequency of Live Bed Scour Depth around Submerged Weirs at Equilibrium Stages

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    contributor authorDawei Guan
    contributor authorLu Wang
    contributor authorLi Ma
    contributor authorBruce W. Melville
    date accessioned2022-05-07T21:24:37Z
    date available2022-05-07T21:24:37Z
    date issued2022-01-25
    identifier other(ASCE)HY.1943-7900.0001972.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4283694
    description abstractPrevious studies have primarily focused on the estimation of equilibrium scour depths around weirs, while overlooking the details of the temporal evolution of the live bed scour process of submerged weirs at the equilibrium stage. This study aims to investigate the relationships between fluctuating frequencies of the approaching bedforms and live bed scour depths around submerged weirs. The average fluctuating frequencies of approaching bedforms, upstream scour depth, and downstream scour depth are quantified from measured topographic time-series data. The frequency of upstream scour depth variations is found to be almost the same as that of bedforms, while the fluctuating frequencies of the scour depth variations downstream of the weir are found to be 0.38–0.68 times the approaching bedform frequencies in the scour equilibrium stage. New empirical equations are proposed to predict the fluctuating frequencies of live bed scour depth variations in the scour equilibrium stage.
    publisherASCE
    titleFluctuating Frequency of Live Bed Scour Depth around Submerged Weirs at Equilibrium Stages
    typeJournal Paper
    journal volume148
    journal issue4
    journal titleJournal of Hydraulic Engineering
    identifier doi10.1061/(ASCE)HY.1943-7900.0001972
    journal fristpage06022001
    journal lastpage06022001-4
    page4
    treeJournal of Hydraulic Engineering:;2022:;Volume ( 148 ):;issue: 004
    contenttypeFulltext
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