A grain size trend modal based on the concept of "dynamic populations"

LIU Tao; SHI Xue-fa; LIU Ying

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LIU Tao, SHI Xue-fa, LIU Ying. A grain size trend modal based on the concept of 'dynamic populations'[J]. Haiyang Xuebao, 2011, 33(5): 97-103.

Citation:

LIU Tao, SHI Xue-fa, LIU Ying. A grain size trend modal based on the concept of "dynamic populations"[J]. Haiyang Xuebao, 2011, 33(5): 97-103.

LIU Tao, SHI Xue-fa, LIU Ying. A grain size trend modal based on the concept of 'dynamic populations'[J]. Haiyang Xuebao, 2011, 33(5): 97-103.

Citation:

LIU Tao, SHI Xue-fa, LIU Ying. A grain size trend modal based on the concept of "dynamic populations"[J]. Haiyang Xuebao, 2011, 33(5): 97-103.

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A grain size trend modal based on the concept of "dynamic populations"

1.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
2.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
3.
College of Civil Engineering, Tongji University, Shanghai 200092, China

Received Date: 2010-10-25

Abstract

Abstract

As a method of inferring net sediment transport pathway from spatial distribution of grain size parameters, the grain size trends analysis (GSTA) has been employed widely in cases of marine geology studies. In this paper, based on the concept of "dynamic populations", a one dimension suspended sediment transport modal has been established to deduce the formation of grain size trend in the net sediment transport direction. The result show that:if the hydrodynamic energy level decreasing along sediment transporting direction, two kinds of grain size trend can form successively in the transporting direction; whereas, if the hydrodynamic energy increasing along sediment transport direction, three kinds of grain size trend can form successively at most. The speed of hydraulic dynamic energy enhancing/attenuation can obviously change the GST distribution along transporting path, Higher speed can enable the GST transform complete in shorter distance. The value of kurtosis has the same variation trend as Std and can be more sensitive to mixing ratio changing, therefore, better result can be gained if we replace the Std with kurtosis in GSTA.
- grain size trend,
- dynamic population,
- sediment transporting modal

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References(21)

References

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