The effects of hydrodynamic conditions on geotechnical strength of the sediment in Yellow River Delta  

作　　者：JIA Yong-Gang LIU Xiao-Lei SHAN Hong-Xian ZHENG Jie-Wen HUO Su-Xia 

机构地区：[1]Key Laboratory of Marine Environment and Ecology, Ministry of Education,China Institute of GenEnvironmental Engineering, College of Environmental Science ＆ Engineering, OceanUniversity of China, Songlinglu 238, Qingdao 266100, China [2]Key Laboratory of Marine Environment and Ecology, Ministry of Education, Songlinglu 238, Qingdao 266100, China [3]Key Laboratory of Marine Environment and Ecology, Ministry of Education, Songlinglu 238,Qingdao 266100, China[

出　　处：《International Journal of Sediment Research》2011年第3期318-330,共13页国际泥沙研究（英文版）

基　　金：funded by the National Natural Science Foundation of China(Contract No.40876042 and No.41072215);the National High Technology Research and Development Program of China (863 Program)(Contract No.2008AA09Z109)

摘　　要：Coastal structures in tidal estuaries are of scientific and societal interest as they form important artificial sea barriers resulting in different hydrodynamic conditions on both sides of them. A field study was performed on both sides of an embankment in the Yellow River Delta, China, in order to investigate the temporal and spatial variations in the geotechnical strength of the sediment caused by the effects of different hydrodynamic conditions. Using a portable core penetration tester together with hydrodynamic observation and fractal dimension analyses, changes in sediment strength were tested in 1999 and 2002 in rectangular areas on both sides of the embankment and along two cross-shore profiles. The field observations both on space and time scales suggest that different intensity in wave loading can not change the mean strength of the superficial sediment within 0--15em depth, but rather makes it more uneven under strong hydrodynamic conditions, with the increasing degree of heterogeneity that can be quantitatively described by the fractal method. The effect of waves is regarded as the major control factor on the quasi-periodic alternation of sediment strength within the study area surface and the depth stratification in the Yellow River Delta. Further work is still necessary to determine the forming process, its mechanism and their implications for efficient environmental management, coastal protection and hazard forecasting.Coastal structures in tidal estuaries are of scientific and societal interest as they form important artificial sea barriers resulting in different hydrodynamic conditions on both sides of them. A field study was performed on both sides of an embankment in the Yellow River Delta, China, in order to investigate the temporal and spatial variations in the geotechnical strength of the sediment caused by the effects of different hydrodynamic conditions. Using a portable core penetration tester together with hydrodynamic observation and fractal dimension analyses, changes in sediment strength were tested in 1999 and 2002 in rectangular areas on both sides of the embankment and along two cross-shore profiles. The field observations both on space and time scales suggest that different intensity in wave loading can not change the mean strength of the superficial sediment within 0--15em depth, but rather makes it more uneven under strong hydrodynamic conditions, with the increasing degree of heterogeneity that can be quantitatively described by the fractal method. The effect of waves is regarded as the major control factor on the quasi-periodic alternation of sediment strength within the study area surface and the depth stratification in the Yellow River Delta. Further work is still necessary to determine the forming process, its mechanism and their implications for efficient environmental management, coastal protection and hazard forecasting.

关 键 词：Sediment strength HETEROGENEITY Hard layer Hydrodynamic action Intertidal zone Yellow River Delta 

分 类 号：P931.5[天文地球—自然地理学] P343.5