Quantifying aeolian transport within the intertidal zone is critical to understanding feedbacks between aeolian and nearshore processes in coastal environments. Here, we report a field study of aeolian transport over a wet bed in the intertidal zone. Predominate winds and beach orientation were aligned during all field observations. Mean grain size of bed samples were 0.18 mm and moisture content ranged from 16 to 17%. Velocity profiles were measured with a vertical array of cup anemometers. Sustained wind velocities were 9.5 m/s at 93 cm above the bed with gusts reaching 13.5 m/s. Five saltation traps captured particles in transport from the bed to a height of 15 cm. Particles in transport were wet and the highest moisture content of trapped sediments was found in the lowest saltation trap. Vertical flux profiles show a higher concentration of flux closer to the bed (81 to 89% below 5 cm) than those measured over dry beds. Power and exponential decay functions were fit to our vertical flux profiles; the exponential decay function best fit flux profiles with larger $\beta$ coefficients and smaller $\alpha$ estimates than those fit to dry bed profiles. Total flux models predict transport below Belly’s (1964) fluid threshold of motion for moist beds and model performance improves when using a threshold for dry sand. Our results suggest transport over wet beds is fundamentally different from transport over dry beds. However, more research is needed to discern the mechanics driving deviations in flux profiles over wet beds in field environments.

量化潮间带内的风沙运输对理解沿海环境中的风沙和近岸过程之间的反馈至关重要。在这里，我们报告了潮间带湿床风沙运移的现场研究。在所有野外观测期间，主要风向和海滩方向均保持一致。床样品的平均晶粒尺寸为0.18毫米，水分含量为16％至17％。用杯形风速计的垂直阵列测量速度分布。持续风速在床上方93厘米处为9.5 m / s，阵风达到13.5 m / s。五个盐分捕集阱捕获了从床到15厘米高的运输过程中的颗粒。运输中的颗粒是湿的，并且在最低的盐分阱中发现了最高的水分含量。垂直通量分布图显示，与在干燥床附近测得的通量相比，离床更近的通量浓度较高（5 cm以下为81％至89％）。幂和指数衰减函数与我们的垂直通量曲线拟合；指数衰减函数最适合通量分布较大的情况$\beta$ 系数较小 $\alpha$估计比那些适合干床轮廓的估计数高。总通量模型预测的运移量低于Belly（1964）的湿床运动流体阈值，并且使用干砂阈值时模型的性能会提高。我们的结果表明，湿床运输与干床运输根本不同。然而，需要更多的研究来辨别在田间环境中湿床上通量分布的驱动机理。