鸭绿江口与邻近西海岸沉积记录的耦合

刘月; 程岩; 李红军; 高建华; 郑金华; 张春鹏; 张亮; 刘敬伟

doi:10.3969/j.issn.0253-4193.2017.01.008

鸭绿江口与邻近西海岸沉积记录的耦合

doi: 10.3969/j.issn.0253-4193.2017.01.008

1.
辽东学院城市建设学院, 辽宁丹东 118003
2.
南京大学海岸与海岛开发教育部重点实验室, 江苏南京 210093
3.
辽中县水利局水务与资源管理办公室, 辽宁沈阳 110200

基金项目: 国家自然科学基金（41271028，41576043）。

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出版历程
- 收稿日期: 2016-04-06
- 修回日期: 2016-07-10

The coupling of the sedimentary records in the Yalu River estuary and the adjacent western coasts

1.
Urban Construction College, Eastern Liaoning University, Dandong 118003, China
2.
Key Laboratory for Coast and Island Development of Ministry of Education, Nanjing University, Nanjing 210093, China
3.
Water Affairs and Resource Management Office, Water Conservancy Bureau of Liaozhong County, Shenyang 110200, China

摘要

摘要: 通过对采自鸭绿江口主汊道的5个柱状样的²¹⁰Pb和¹³⁷Cs测年以及粒度参数的分析，并与前期合作研究的西汊道及西岸潮滩的4个柱状样沉积物的测年和粒度研究成果进行比对，探讨了流域来水来沙、河口沉积与海岸发育之间的耦合效应及鸭绿江河口地貌演化的新证据。结果表明：鸭绿江口主汊道存在河流和潮流两种沉积作用，不同时期动力作用不同；以潮流作用为主的沉积时段，其沉积特征与西汊道及西岸潮滩的一致；主汊道沉积物的物质来源与西汊道和西岸潮滩的物质来源存在差异。鸭绿江口的主汊道、西汊道及邻近海岸的沉积记录对环境变化、人类活动、流域大洪水等事件均存在响应，响应的时间基本同步，具有耦合效应。沉积记录中存在5个明显的“事件信号”，其中1960年最为重要，是鸭绿江河口地貌发生巨变的时间。
- 沉积记录 /
- 鸭绿江口 /
- 耦合
Abstract: New evidence of the geomorphic evolution in the Yalu River estuary and coupling effects between water, sand, estuarine deposit and coastal development were explored, based on the analysis of ²¹⁰Pb and ¹³⁷Cs dating and the granularity of the 5 sediment cores collected from the Main Branch of the Yalu River estuary and the formerly studied 4 sediment cores collected in the tidal flat of western coasts and the West Branch. The results indicated that the fluvial action and the tidal action individually dominated the different sedimentary periods in the Main Branch;and the deposit dominated by the tidal action in the Main Branch was in accord with those in the West Branch and the adjacent western coasts in the Yalu River estuary. The material sources in the Main Branch were different from the West Branch and the western coasts. For the sedimentary records in the Main Branch, West Branch and the western coasts were all coupled with the environmental changes, the human activities, and the watershed events like the floods, and the responding time was basically synchronous. 5 obvious "event signals" appeared the sedimentary records, and the year of 1960 was the most important time when the estuarine geomorphy changed greatly.
- sedimentary record /
- Yalu River estuary /
- coupling

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