| High resolution records of flood deposition in the mud area off the Changjiang River mouth during the past century | |
| Hu Gang1,2,3; Li Anchun1; Liu Jian2; Xu Gang2; Mei Xi2; Kong Xianghuai2; Li, AC (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China. | |
| 2014-07-01 | |
| 发表期刊 | CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
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| 卷号 | 32期号:4页码:909-920 |
| 文章类型 | Article |
| 摘要 | This paper presents a paleoflood study to determine the flood frequency of the Changjiang River, based on core cj0702, taken from the Changjiang River subaqueous delta. We identified flood deposits by means of high-resolution grain-size variation, sensitive population, geochemical indexes and magnetic susceptibility. The core covers a time span of 120 years by Pb-210 dating and was sampled at 1-2 cm intervals. Grain size, geochemical elements, and physical parameters were analyzed. The results indicate that the sediment of the core is mainly composed of silt and clay, as well as groups of interbedded silt, clay silt, and clay. Vertically, the grain size pattern was controlled by seasonal variations in water discharge and by the sediment input in winter from the abandoned Huanghe River delta. River flooding caused extreme values in all our measured parameters. We identified more than 20 flood events that occurred since 1887 using the physical parameter analysis method. The environmentally sensitive component of sediment grain size (14.32-96.39 m) contribution>30%, Zr/Rb ratio>1.5, and magnetic susceptibility>16 were selected as the criteria for flood identification generally. We also found that floods that had taken place in the upstream, midstream, or downstream parts of the river were clearly identified by these indexes while the large-scale floods that covered the whole drainage area did not leave clear indications in the sediment record. This study for identification of flood events is of great significance for understanding hyperpycnal current sedimentation as well as for forecasting of floods. |
| 关键词 | High Resolution Grain Size Flood Deposition Mud Area The Changjiang River |
| 学科领域 | Marine & Freshwater Biology ; Oceanography |
| DOI | 10.1007/s00343-014-3244-x |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000339046200018 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/23819 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Li, AC (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China. |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Minist Land & Resources, Key Lab Marine Hydrocarbon Resources & Environm G, Qingdao 266071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Hu Gang,Li Anchun,Liu Jian,et al. High resolution records of flood deposition in the mud area off the Changjiang River mouth during the past century[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2014,32(4):909-920. |
| APA | Hu Gang.,Li Anchun.,Liu Jian.,Xu Gang.,Mei Xi.,...&Li, AC .(2014).High resolution records of flood deposition in the mud area off the Changjiang River mouth during the past century.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,32(4),909-920. |
| MLA | Hu Gang,et al."High resolution records of flood deposition in the mud area off the Changjiang River mouth during the past century".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 32.4(2014):909-920. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| High resolution reco（1418KB） | 限制开放 | ODC PDDL | 浏览 | |||
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