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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Suspended sediment load transport in the Mississippi River basin at St. Louis: temporal scaling and nonlinear determinism
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Suspended sediment load transport in the Mississippi River basin at St. Louis: temporal scaling and nonlinear determinism

机译：密西西比河流域圣路易斯的悬浮泥沙负荷输送：时间尺度和非线性确定性

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摘要

This study investigates the dynamic behavior of suspended sediment load transport at different temporal scales in the Mississippi River basin. Data corresponding to five successively doubled temporal scales (i.e. daily, two-day, four-day, eight-day and 16-day) from the St. Louis gaging station in Missouri are analyzed. The investigation is focused on identifying possible low-dimensional deterministic behavior in the suspended sediment load transport dynamics, with an aim towards reduction in model complexity. The correlation dimension method is used to identify low-dimensional determinism. The suspended sediment load dynamics are represented through phase-space reconstruction, and the variability is estimated using the (proximity of) reconstructed vectors in the phase space. The results indicate the presence of low-dimensional determinism in the suspended sediment load series at each of the five temporal scales, with the variables dominantly governing the dynamics in the order of three or four. These results not only suggest the appropriateness of relatively simpler models but also hint at possible scale invariance in the suspended sediment load transport dynamics. Copyright (c) 2006 John Wiley & Sons, Ltd.
机译：这项研究调查了密西西比河流域不同时间尺度上悬浮泥沙负荷输送的动力学行为。分析了来自密苏里州圣路易斯测量站的五个相继加倍的时间尺度（即每日，两天，四天，八天和十六天）的数据。这项研究的重点是确定悬浮泥沙负荷输送动力学中可能的低维确定性行为，以期降低模型的复杂性。相关维数方法用于识别低维确定性。通过相空间重构来表示悬浮的泥沙负荷动力学，并使用相空间中的重构向量（的接近度）估算变异性。结果表明，在五个时间尺度的每个尺度上，悬浮沉积物负荷序列中都存在低维确定性，其中变量主要控制着三到四个量级的动力学。这些结果不仅表明相对简单的模型的适用性，而且还暗示了悬浮泥沙负荷输运动力学的规模可能不变。版权所有（c）2006 John Wiley＆Sons，Ltd.

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