Estimation method for sediment flux of fine sediment with fluid mud layer
Project/Area Number |
23560617
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Hydraulic engineering
|
Research Institution | Independent Administrative Institution Port and Airport Research Institute |
Principal Investigator |
NAKAGAWA YASUYUKI 独立行政法人港湾空港技術研究所, その他部局等, その他 (30360762)
|
Project Period (FY) |
2011-04-28 – 2015-03-31
|
Project Status |
Completed (Fiscal Year 2014)
|
Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
|
Keywords | 底泥 / Fluid mud / 底質輸送 / 含水比 / 巻き上げ / ビンガムモデル / 波浪外力 |
Outline of Final Research Achievements |
This study propose models for the key processes of fluid mud dynamics, including vertical and horiontal fluxes of the muddy sedimnet. The diffusion flux model delivers quite reliable results for estimating erosion flux from the top of fluid mud layers under the comparison with the time series data measured by an acoustic Doppler velocimeter (ADV) system in the field. This study also derives analytical solutions, based on the Bingham fluid concept, of advection flux in the fluid mud layer on which external shear stress force is applied. Furthermore, estimation method of force condition that is crucial for simulation of sediment transport processes was also improved incorporating irregularity of wave effects on the bottom shear stress with a stochastic approach. The derived model is applied to estimate sediment transport rate combining with the fluid mud transport model showing reasonable results rather than a conventional methods with constant bottom shear stresses.
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Report
(5 results)
Research Products
(12 results)
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[Book] ヘドロ2015
Author(s)
中川康之
Total Pages
6
Publisher
水底質浄化協会
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