Influence of tidal marsh vegetations on hydrodynamics and sedimentation in the Changjiang Estuary

YANG Shi-lun; SHI Zhong; ZHAO Qing-ying

Article Contents

Article Navigation > Haiyang Xuebao > 2001 > 23(4): 75-80

YANG Shi-lun, SHI Zhong, ZHAO Qing-ying. Influence of tidal marsh vegetations on hydrodynamics and sedimentation in the Changjiang Estuary[J]. Haiyang Xuebao, 2001, 23(4): 75-80.

Citation:

YANG Shi-lun, SHI Zhong, ZHAO Qing-ying. Influence of tidal marsh vegetations on hydrodynamics and sedimentation in the Changjiang Estuary[J]. Haiyang Xuebao, 2001, 23(4): 75-80.

YANG Shi-lun, SHI Zhong, ZHAO Qing-ying. Influence of tidal marsh vegetations on hydrodynamics and sedimentation in the Changjiang Estuary[J]. Haiyang Xuebao, 2001, 23(4): 75-80.

Citation:

YANG Shi-lun, SHI Zhong, ZHAO Qing-ying. Influence of tidal marsh vegetations on hydrodynamics and sedimentation in the Changjiang Estuary[J]. Haiyang Xuebao, 2001, 23(4): 75-80.

PDF( 585 KB)

Influence of tidal marsh vegetations on hydrodynamics and sedimentation in the Changjiang Estuary

1.
State Key Laboratory of Estuarine & Coastal Research, East China Normal University, Shanghai 200062, China
2.
Institute of Harbour and Hydroulics, Shanghai Jiaotong University, Shanghai 200030, China

Received Date: 2000-10-12
Rev Recd Date: 2000-12-15

Abstract

Abstract

Bottom current, wave height, bottom suspended sediment concentration, sediments trapped by plants, deposits and shoreface elevations were measured on the natural and artificial flats and in the pioneer Scirpus as well as the upper distributed Spartina, respectively, to examine the effects of marsh plants on hydrodynamic and sedimentation processes.The parameter ratios of marsh to its neighboring bare flat in the same contour are found to be 0.16~0.84 in mean current velocity (the average of the whole tidal cycle), and 1.4, 0.43 and 0.71 in mean wavelength, mean wave height and mean suspended sediment concentration at the beginning of the flood, respectively.Waves in marsh are in rows while those on bare flat are solitary.The amount of sediments trapped by Scirpus mariqueter reaches 298 g/m².Deposits in marsh are found to be much finer than those on the neighboring flat.Erosion is restrained and accretion is quickened in marsh environment through comparing with bare flat.The effects of marsh vegetations on hydrodynamics and sedimentation are related to plant features and the shorew ard distance from the low limitation of marsh.
- hydrodynamics,
- sedimentation,
- tidal marsh,
- Changjiang Estuary

FullText(HTML)

References(14)

References

KNUSTON P L,BROCHU R A,SEELIG W N,et al.Wave damping in Spartina altenifiora Marshes[A].Wetlands[M].1982.87～104.

FREY R W,BANSAN P B.Coastal salt marshes[A].Davis R A.Coastal Sedimentary Environment[M].New York,Berlin,Heldelberg,Tokyo:Springer-Verlag,1985.101～159.

ASANO T,DEGUCHI H,KOBAYASHI N.Interaction between water waves and vegetation[A].Proceeding of the 23rd International Conference on Coastal Engineering[C].Venice,Italy,1992.2710～2723.

ASANO T,SETOGUCHI Y.Hydrodynamic effects of coastal vegetation on wave damping[A].CHWANG A T,LEE J H W,LEUNG D Y C.Hydrodynamics[M].Balkema,Rottemam,1996.1051～1056.

KOBAYASHI N,RAICHE A W,ASANO T.Wave attenuation by vegetation[J].Journal of Waterway,Port,Coastal and Ocean Engineering,1993,119:30～48.

ECKMAN J R.Hydrodynamic processes affecting benthic recruitment[J].Limnology and Oceanography,1983,28(2):241～257.

SHI Z,PETHICK J S,PYE K.Flow structure in and above the various heights of a saltmarsh canopy:a laboratory flume study[J].Journal of Coastal Research,1995,11(4):1204～1209.

庄武艺,谢佩尔.海草对潮滩沉积作用的影响[J].海洋学报,1991,13(2):230～239.

GLEASON M L,ELMER D A,PIEN N C,et al.Effects of stem density upon sediment retension by saltmarsh cord grass,Spartina alteniflora lioisel[A].Estuaries[M],1979.271～273.

STUMPF R P.The processes of sedimentation on the surface of a saltmarsh estuarine[J].Coastal and Shelf Science,1983,17:495～508.

STEVENSON J C,WARD L G,KEARNEY M S.Sediment transport and trapping in marsh system:implication of tidal flux studies[J].Marine Geology,1988,80:37～59.

YANG Shi-lun,CHEN Ji-yu.Coastal salt marshes and mangrove swamps in China[J].Chin J Oceanol Limnol,1995,13(4):318～324.

吕也博,陈吉余,陈德昌,等.上海市海岛资源综合调查报告[R].上海:上海科学技术出版社,1996.249.

陈吉余,杨启伦,赵传.上海市海岸带和海涂资源综合调查报告[R].上海:上海科学技术出版社,1988.390.

Relative Articles

Supplements(0)

Cited By

Proportional views