Nonsuspended sediment transport (NST) refers to the sediment transport regime in which the flow turbulence is unable to support the weight of transported grains. It occurs in fluvial environments (i.e., driven by a stream of liquid) and in aeolian environments (i.e., wind‐blown) and plays a key role in shaping sedimentary landscapes of planetary bodies. NST is a highly fluctuating physical process because of turbulence, surface inhomogeneities, and variations of grain size and shape and packing geometry. Furthermore, the energy of transported grains varies strongly due to variations of their flow exposure duration since their entrainment from the bed. In spite of such variability, we here propose a deterministic model that represents the entire grain motion, including grains that roll and/or slide along the bed, by a periodic saltation motion with rebound laws that describe an average rebound of a grain after colliding with the bed. The model simultaneously captures laboratory and field measurements and discrete element method (DEM)‐based numerical simulations of the threshold and rate of equilibrium NST within a factor of about 2, unifying weak and intense transport conditions in oil, water, and air (oil only for threshold). The model parameters have not been adjusted to these measurements but determined from independent data sets. Recent DEM‐based numerical simulations (Comola, Gaume, et al., 2019; https://doi.org/10.1029/2019GL082195) suggest that equilibrium aeolian NST on Earth is insensitive to the strength of cohesive bonds between bed grains. Consistently, the model captures cohesive windblown sand and windblown snow conditions despite not explicitly accounting for cohesion.

中文翻译：

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跨弱和强水下水质，风沙和风沙的泥沙输运阈值和速率的统一模型

非悬浮泥沙输送（NST）是指泥沙输送方式，其中湍流无法支撑输送谷物的重量。它发生在河流环境（即由液体流驱动）和风沙环境（即风吹）中，在塑造行星体的沉积景观中起着关键作用。由于湍流，表面不均匀以及晶粒尺寸，形状和堆积几何形状的变化，NST是一个高度波动的物理过程。此外，由于自从床夹带起它们的流动暴露持续时间的变化，所以运输的谷物的能量有很大的变化。尽管存在这种可变性，我们还是在这里提出一种确定性模型，该模型表示整个谷物运动，包括沿着床层滚动和/或滑动的谷物，通过具有周期性反弹规律的盐化运动来描述谷物与床碰撞后的平均反弹。该模型同时捕获实验室和现场测量值，以及基于离散元方法（DEM）的NST阈值和平衡速率的数值模拟，其系数约为2，统一了油，水和空气（仅油）中的弱和强运输条件阈值）。模型参数尚未针对这些测量进行调整，而是根据独立的数据集确定的。最近基于DEM的数值模拟（Comola，Gaume等，2019; https：//doi.org/10.1029/2019GL082195）表明，地球上平衡的风成NST对基质颗粒之间的内聚键强度不敏感。始终如一