Study of Erosion Mechanism by Modelling Abandoned Yellow River Delta

Abstract:

Three dimensional physical model designed to study erosion mechanism of estuary subaqueous delta is one of the most important approaches for investigating erosion mechanism of delta; In this study, effects of pore water pressure on seabed and subsequent alterations of seabed topography during wave action were examined by using a physical model. This model provides a good tool to understand impacts of silt liquefaction on the seabed, the whole process of erosion of estuary subaqueous delta, formation and changes of sandbars, and the forces and changes of soft strata through interaction with wave action. We have demonstrated that the characteristic features of a soft stratum and the erosive forces existing in its aquatic environment tend to induce rheological diversification and creep. This often leads to ultimate diapir causing significant damages to underwater and offshore engineering facilities. Moreover, submarine sand wave is a common geomorphological feature of seabed. Impacts of waves and seabed topography on the formation and characteristics of sand waves are analyzed particularly in this study.

• Periodical: Applied Mechanics and Materials (Volumes 226-228)
• Pages: 2278-2283
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.226-228.2278
• Online since: November 2012
• Authors: Jie Liu, Tao Gao
• Keywords: Abandoned Yellow River Delta, Physical Simulation, Pore Pressure Change, Sand Wave, Wave Action

References

[1] C. Gang, Y. Ming, and W. Ping. The influences of suspended load on the sedimentation in the coastal zones and continental shelves of China: Marine Geology, (1991) v. 96, pp.341-352.

DOI: 10.1016/0025-3227(91)90155-w

[2] G. Cao, and Y. Liu. Surveillance and prevention of Hemorrhagic Fever with Renal Syndrome in Yellow River Delta: Chinese Journal of Vector Biology and Control, (2003) v. 14, pp.53-56.

[3] T. Youd, L., I. Arango, G. Castro, J. T. Christian. Liquefaction Resistance of Soils: Summary Report from the 1996 NCEER and 1998 NCEER∕ NSF Workshops on Evaluation of Liquefaction Resistance of Soils: Journal of Geotechnical and Geoenvironmental Engineering,(2001) v.127, p.817.

DOI: 10.1061/(asce)1090-0241(2001)127:4(297)

[4] H. Wang., Z. Yang, Y. Saito, J. P. Liu, and X. Sun. Interannual and seasonal variation of the Huanghe (Yellow River) water discharge over the past 50 years: Connections to impacts from ENSO events and dams: Global and Planetary Change, (2006) v. 50, pp.212-225.

DOI: 10.1016/j.gloplacha.2006.01.005

[5] H. Seed, and I. M. Idriss. Simplified procedure for evaluating soil liquefaction potential: Journal of the Soil Mechanics and Foundations Division, (1971) v. 97, pp.1249-1273.

DOI: 10.1061/jsfeaq.0001662

[6] X Xiu, L. Dongyan, and Z. Mi. Correlaion Comparison Between Laser Method and Pipette-Sieve Method of Grain Size: Journay of Ocean University of China, (2002) v. 32, pp.608-614.

[7] G. R. Andersen, P. J. Valent, and S. P. Gonzales. Analytical Technique for the Interpretation of Measured Pore Pressures in Shallow Marine Sediments: ISOPE-2001: Eleventh(2001) International Offshore and Polar Engineering Conference, (2001) pp.469-475.

[8] Expedition. Pore pressure penetrometers document high overpressure near the seafloor where multiple submarine landslides have occurred on the continental slope, offshore Louisiana, Gulf of Mexico: Earth and Planetary Science Letters, (2008) v. 269, pp.309-325.

DOI: 10.1016/j.epsl.2007.12.005

[9] Q. Ye, G. Liu, G. Tian, S. Chen, and Y. Shi. Geospatial-temporal analysis of land-use changes in the Yellow River Delta during the last 40 years: Science in China Series D: Earth Sciences, (2004) v. 47, pp.1008-1024.

DOI: 10.1360/03yd0151

[10] Guangxue Li, K. Zhuang, and H. Wei. Sedimentation in the Yellow River delta. Part III. Seabed erosion and diapirism in the abandoned subaqueous delta lobe: Marine Geology, (2000) v. 168, pp.129-144.

DOI: 10.1016/s0025-3227(00)00053-0

[11] D. Anthony and J. O. Leth. Large-scale bedforms, sediment distribution and sand mobility in the eastern North Sea off the Danish west coast: Marine geology, (2002) v. 182, pp.247-263.

DOI: 10.1016/s0025-3227(01)00245-6