《黃河三角洲波致海床沉積物再懸。ㄓ⑽陌妫肥恰昂Q蠊こ毯涂茖W(xué)前沿系列(英文版)”之一,反映了海洋工程領(lǐng)域研究的新成果,內(nèi)容覆蓋了海洋工程設(shè)計(jì)、離岸地質(zhì)技術(shù)、波浪與海床交互作用、海洋環(huán)境下的沉積物轉(zhuǎn)移、近岸水動力學(xué)等領(lǐng)域新前沿技術(shù)!饵S河三角洲波致海床沉積物再懸。ㄓ⑽陌妫穬(nèi)容詳實(shí),實(shí)驗(yàn)論證充分,具有一定的學(xué)術(shù)意義和價值,為黃河三角洲波致海床沉積物再懸浮的研究提供寶貴的資料。
Sediment erosion and resuspension is a process in which soil particles on the surface of the seabed are activated by hydrodynamic force, and eventually enter the overlying water body. It is the root cause of beach evolution as well as channel erosion and siltation, an important cause of instability of offshore engineering structures, and an important path of releasing and transporting seabed buried pollutants to the water body. Accurate prediction of sediment erosion and resuspension process has been a challenge for coastal engineers and scholars.
The traditional view is that sediment erosion and resuspension is induced by wave-current combined shear stress, and that the quantitative evaluation method is mainly based on the balance between erosion force and erosion resistance. However, in a wave-dominant hydrodynamic environment, the fine-grained seabed is prone to accumulation of pore water pressure and even seabed liquefaction under the action of wave loading. Such characteristic of wave-seabed interaction causes constant changes in the composition, structure, physical, and mechanical properties of the seabed sediments, and thus further affects the erosion and resuspension process of sediments. Due to the complexity of the process and the interdisciplinary nature of the problem, there is not only a lack of systematic understanding of the physical mechanism, but also a lack of a highly universal computational model for quantitative prediction of the sediment erosion and resuspension under such wave-seabed interaction, which seriously constrains the development of offshore engineering calculations and numerical simulations.
1 Introduction
1.1 Sediment Dynamics in the World's Major Estuaries
1.2 Sediment Erosion and Resuspension
1.3 Research Advance
1.3.1 Research Advance on Sediment Erosion and Resuspension
1.3.2 Research Advance on Wave-Induced Seabed Response
1.3.3 Research Advance of Sediment E& R Considering Wave- Seabed Response
1.3.4 Research Advance of Sediment E& R in the Modem Yellow River Delta
1.4 Outline of the Book
References
2 Geo-Marine Environment and Sediment Properties of the Modern Yellow River Delta
2.1 Overview
2.2 Formation and Evolution of the Modem Yellow River Delta
2.2.1 Geographical Range
2.2.2 Historical Sediment Discharge
2.2.3 Channel Changes
2.2.4 Coastline Change
2.3 Topography and Geomorphology of the Modem Yellow River Delta
2.3.1 Topography
2.3.2 Geomorphology
2.4 Marine Dynamics in the Modem Yellow River Delta
2.4.1 Meteorology
2.4.2 Waves
2.4.3 Tide
2.4.4 Currents
2.4.5 Storm Surge
2.5 Seabed Sediment Properties of the Modem Yellow River Delta
2.5.1 Sediment Types and Distribution in the Modem Yellow River Delta
2.5.2 Geological Strata
2.5.3 Sediment Grain Size and Mineral Composition
2.5.4 Sediment Microstructure
2.5.5 Physical and Mechanical Properties of Sediment
2.6 Summary
References
3 Erosion Survey of the Modern Yellow River Delta
3.1 Overview
3.2 Erosion Survey of a Typical Coast
3.2.1 Methodology
3.2.2 Results
3.2.3 Analysis of Coastal Erosion
3.3 Erosion Survey of the Subaqueous Delta
3.3.1 Methodology
3.3.2 Historical Erosion and Deposition Evolution of the Yellow
River Delta
3.3.3 Impact of Storm Surge on Subaqueous Delta Erosion
3.4 Summary
References
4 Erodibility of Seabed Sediments in the Modern Yellow River Delta
4.1 Overview
4.2 Flume Measurements of Sediment Erodibility
4.2.1 Methodology
4.2.2 Results
4.2.3 The Spatial Difference of Sediment Erodibility
4.2.4 The Effect of Sediment Physical-Mechanical Properties on Erodibility
4.2.5 The Effect of Crab-Burrows on Erodibility
4.3 CSM Measurements of Sediment Erodibility
4.3.1 Methodology
4.3.2 Results
4.3.3 Implications for Erosional Landforms of the Modem Yellow River Delta
4.3.4 Factors Influencing Critical Shear Stress of the Modem Yellow River Delta
4.3.5 Comparisons with Critical Shear Stress from Other Estuarine Deltas
4.3.6 Summary
References
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5 Sediment Resuspension Process in the Modern Yellow River Delta
6 Wave-Induced Pore Pressure in Relation to Sediment Erosion and Resuspension in the Modern Yellow River Delta
7 Physical Mechanisms of Wave-Induced Sediment Resuspension
8 Theoretical Prediction of Wave-Induced Sediment Resuspension