Modern sedimentation rates in the intertidal zone on the west coastal zone of the Bohai Gulf

MENG Wei; LEI Kun; ZHENG Bing-hui; WANG Fu; WANG Hong; LI Jian-fen; LI Yong

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Article Navigation > Haiyang Xuebao > 2005 > 27(3): 67-72

MENG Wei, LEI Kun, ZHENG Bing-hui, WANG Fu, WANG Hong, LI Jian-fen, LI Yong. Modern sedimentation rates in the intertidal zone on the west coastal zone of the Bohai Gulf[J]. Haiyang Xuebao, 2005, 27(3): 67-72.

Citation:

MENG Wei, LEI Kun, ZHENG Bing-hui, WANG Fu, WANG Hong, LI Jian-fen, LI Yong. Modern sedimentation rates in the intertidal zone on the west coastal zone of the Bohai Gulf[J]. Haiyang Xuebao, 2005, 27(3): 67-72.

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Modern sedimentation rates in the intertidal zone on the west coastal zone of the Bohai Gulf

1.
College of Marine Environment, Ocean University of China, Qingdao 266003, China;Chinese Research Academy of Environmental Sciences, Beijing 100012, China
2.
Chinese Research Academy of Environmental Sciences, Beijing 100012, China
3.
Tianjin Institute of Geology and Mineral Resoruces, Chinese Geological Survey Bureau, Tianjin 300170, China
4.
Institute of Agro-environment and Sustainable Development, Chinese Academy of Agricultural Scicences, Beijing 100081, China

Received Date: 2005-01-06
Rev Recd Date: 2005-04-14

Abstract

Abstract

On the basis of the measurement of ²¹⁰Pb_ex and ¹³⁷Cs activities in the sediment cores taken from the intertidal zone on the west coastal zone of the bohai gulf,the average sedimentation rates of modern sediments are calculated.The results indicate that in the sandy area of the intertidal zone (from Daogouzi to the Duliujian River),the sedimentation rate from 1955 to 1963 is 3.43~4.06 cm/a,and is within the range of 0.65~1.59 cm/a since 1963.The average sedimentation rate in the muddy area (around Qikou) is approximately 1.81cm a^-1.The results above suggest that the sandy area of the intertidal zone of the western coast of the Bohai Gulf had experienced rapid sedimentation from the 1950s to the 1960s,and the sedimentation sloweds after 1960s,and the sedimentation rates increased from the north to south spatially.The rapid sedimentation from the 1950s to the 1960s in the sandy area was due to the facts that North China had plentiful precipitation during this period and the intertidal zone was supplied with abundant material sources for sedimentation.After the 1960s,the weakened sedimentation might result from the decrease of sand transported to the intertidal zone,which was the consequence of diminished rainfall in North China and the intensive human activities in the Haihe basin.
- Bohai Gulf,
- intertidal zone,
- sedimentation rate,
- ²¹⁰Pb_ex,
- ¹³⁷Cs

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