Self-burial of objects on sandy beds by scour: A synthesis of observations
Self-burial of objects on sandy beds by scour: A synthesis of observations
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通过冲刷将物体自埋在沙床上：观察结果的综合
DOI：
10.1201/9781315375045-23
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发表时间：
2016
影响因子：
5
通讯作者：
A. Brandt
中科院分区：
文献类型：
--
作者：
C. Friedrichs;S. Rennie;A. Brandt
通过对 750 多个观测值的分析，研究了影响平衡、沙子中冲刷引起的埋藏深度 (B) 相对于物体直径 (D) 的因素。研究发现，在无波浪的稳定水流下增加冲刷引起的 B/D 的主要因素是增加的屏蔽参数 () 和较小的 D (< 3 cm)，单独的幂律适用于清水和活床条件。对于较大的 D，较大的圆柱体密度也会增加稳定电流下的 B/D。在波浪主导条件下增加冲刷引起的 B/D 的主要因素是增加的 Keulegan-Carpenter 数。随着平行于波轨道的平均电流分量减少，B/D 也会增加。对于波浪下的圆柱体，B/D 也会随着波轨道与圆柱体轴线之间角度的增大而增大。在其他条件相同的情况下，锥形圆柱体埋藏最多，其次是圆柱体，然后是球体，而截头圆锥体埋藏最少。依赖于上述变量的参数化模型解释了 B/D 中观察到的 85% 的方差。
Factors that influence equilibrium, scour-induced burial depth (B) in sand relative to object diameter (D) are examined through analysis of over 750 observations. The main factors that increase scour-induced B/D under steady currents without waves are found to be an increased Shields parameter () and small D (< 3 cm), with separate power laws applicable to clear-water and live-bed conditions. For larger D, greater cylinder density also increases B/D under steady currents. The main factor that increases scour-induced B/D under wave-dominated conditions is an increased Keulegan-Carpenter number. B/D additionally increases as the mean current component parallel to wave orbitals decreases. For cylinders under waves, B/D also increases as increases and as the angle between wave orbitals and a cylinder’s axis increases. All else being equal, tapered cylinders bury most, followed by cylinders, then spheres, and conical frustums bury least. Parameterized models dependent on the above variables explain 85% of observed variance in B/D.