渤海湾西岸潮间带现代沉积速率研究

孟伟; 雷坤; 郑丙辉; 王福; 王宏; 李建芬; 李勇

渤海湾西岸潮间带现代沉积速率研究

孟伟^1,,
雷坤²,
郑丙辉²,
王福³,
王宏³,
李建芬³,
李勇⁴

1.
中国海洋大学, 海洋环境学院, 山东, 青岛, 266003;中国环境科学研究院, 北京, 100012
2.
中国环境科学研究院, 北京, 100012
3.
中国地质调查局天津地质矿产研究所, 环境与水资源室, 天津, 300170
4.
中国农业科学院, 农业环境与可持续发展研究所, 北京, 100081

基金项目: 国家高技术研究发展计划(“863”计划)课题“渤海典型海岸带生境修复技术”资助项目(2002AA648010)

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出版历程
- 收稿日期: 2005-01-06
- 修回日期: 2005-04-14

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

摘要

摘要: 利用渤海湾西岸潮间带柱状沉积物的²¹⁰Pb_ex和¹³⁷Cs活度测定结果,计算了潮间带现代沉积物的平均沉积速率,结果表明,渤海湾西岸潮间带砂质区(道沟子至独流减河)1955～1963年的沉积速率为3.43～4.06cm/a,1963年以来的平均沉积速率为0.65～1.59cm/a;泥质区(歧口附近)的平均沉积速率约为1.81cm/a.上述结果说明潮间带砂质区在20世纪50～60年代发生快速沉积作用,60年代之后沉积作用变缓.这可能是由于华北地区在该时段具有丰沛的降水和入海水沙,为潮间带沉积物提供了丰富的物源.60年代以后沉积作用变缓可能是自然和人类活动引起的入海水量减少和由此导致的物源减少的结果.
- 渤海湾 /
- 潮间带 /
- 沉积速率 /
- ²¹⁰Pb_ex /
- ¹³⁷Cs
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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