Scour morphology downstream of submerged block ramps

Mahdi Esmaeili Varaki, S. Mahmoudi Kurdistani, Gita Noormohammadi
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引用次数: 3

Abstract

In this study, the effects of geometric parameters, such as the ramp roughness size and the ramp slope on the scour parameters downstream of block ramps, are experimentally investigated for different hydraulic conditions. Scour parameters, such as the maximum scour depth and length and the maximum ridge height and length, are evaluated. Experiments are conducted in clear water conditions (no sediment transport) for different gravel ramp slopes in which different critical flow depths and tailwater depths are examined. The results indicate that the maximum scour depth downstream of a block ramp for different bottom slopes is directly affected by the tailwater depth, independent of the critical flow depth; the scour depth decreases by increasing tailwater depth. A comparison of the results indicates that increasing the roughness of the block ramp leads to a reduction in the maximum scour depth.
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淹没式块体坡道下游冲刷形态
在本研究中,实验研究了不同水力条件下,几何参数(如斜坡粗糙度大小和斜坡坡度)对块体斜坡下游冲刷参数的影响。对冲刷参数进行了评估,如最大冲刷深度和长度以及最大山脊高度和长度。试验是在清水条件下(无泥沙输送)对不同砾石斜坡进行的,其中检查了不同的临界流量深度和尾水深度。结果表明,不同底坡的块体斜坡下游最大冲刷深度直接受尾水深度的影响,与临界流深度无关;冲刷深度随尾水深度的增加而减小。结果的比较表明,增加块体斜坡的粗糙度会导致最大冲刷深度的减小。
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来源期刊
CiteScore
2.90
自引率
16.70%
发文量
31
期刊介绍: JAWER’s paradigm-changing (online only) articles provide directly applicable solutions to water engineering problems within the whole hydrosphere (rivers, lakes groundwater, estuaries, coastal and marine waters) covering areas such as: integrated water resources management and catchment hydraulics hydraulic machinery and structures hydraulics applied to water supply, treatment and drainage systems (including outfalls) water quality, security and governance in an engineering context environmental monitoring maritime hydraulics ecohydraulics flood risk modelling and management water related hazards desalination and re-use.
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