国内外河口悬沙通量研究进展

系统地介绍了国内外河口悬沙通量研究的进展,目前对于河口悬沙通量主要采用模型研究、水文学方法、机制分解、仪器直接测量等方法从理论和实际相结合的角度来进行研究。目前物理模型的研究成果比较直观,但受到模型尺度和精度等的限制,数学模型研究具有快、准的优点,可以给出令人满意的定性结果,但未能达到定量预报的程度;传统的水文学方法可以用来研究河口地区悬移质泥沙在不同动力因子作用下的输移情况;机制分解法是比较成熟和可靠的方法,但该方法与河口动力机制和泥沙输移过程结合不够;使用先进仪器进行直接测量则受到仪器精度和取样点的布设等条件的限制。因此,关于河口悬沙通量的研究还有待于深入和细化。

REVIEW OF SUSPENDED SEDIMENT FLUX IN THE WORLD

The progress of the suspended sediment flux in the world is reviewed in this paper, the methods of researching in theory, simulation experiment, mathematical modeling, hydrological, mechanism analysis and field measurement with the advanced instruments have been adopted to study the suspended sediment flux. The transportation of the suspended sediment in the estuary mainly studied the vertical distribution of suspended sediment concentration and lopsided transportation. The physical models are intuitive, but limited by the scales and precisions of the models and lack of suspended sediment models. The mathematical models can provide qualitative products due to their speed and veracity. The transportation of the suspended sediment, especially the spatio-temporal distribution of the sediment, which can be studied with the traditional hydrological method under the different dynamic factors in the estuary. The mechanism analysis is a mature and credible method, but lacking in combing with the dynamical mechanism and the suspended sediment transportation in the estuary. The field measurement with the advanced instruments is affected by the precision of the instruments and the setting points. As a result, many things of suspended sediment flux need to be done thoroughly. 