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从频域分析波动输运过程的时均通量
李炎1
国家海洋局第二海洋研究所
摘要:
本文提出悬沙输运时均通量可在频域上用共谱密度函数表达。据此分析了长周期和12h,6h等潮周期波动分量对河口、潮汐通道及浅滩区悬沙净输运的重要贡献。文章还讨论了它们的形成机制和从频域上分解扩散系数的可能。
关键词:  悬沙输送  共谱密度函数  通量
DOI：
分类号:
基金项目:
NOTES ON NET FLUX IN FLUCTUATED PROCESS IN VIEW OF FREQUENCY WITH SPECIAL REFERENCE TO THE SUSPENDED SEDIMENT TRANSPORT
Abstract:
It was deducted that S(concentration of suspended sediment)-V(water current velocity) cospectrum expresses the contributions to net flux from domain of frequency. Main contributions from long-term fluctuation and some tidel fluctuations (T=12h or T=6h) were gained by comparision among cospectrums of some stations in tidal inlets and estuaries. Discussed also was the causes and the desoluted form of dispersion(diffusion) coefficient.
Key words:  Suspended sediment transport, Cospectrum, Flux
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