首页 | 期刊介绍 | 编委会 | 道德声明 | 投稿指南 | 常用下载 | 过刊浏览 | In English
引用本文:
【打印本页】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 79次   下载   
分享到: 微信 更多
黄河三角洲孤东近岸冲淤演变及其影响因素
程慧1, 陈沈良1, 徐丛亮2, 姬泓宇3, 凡姚申3
1.华东师范大学;2.黄河河口海岸科学研究所;3.华东师范大学河口海岸学国家重点实验室
摘要:
自1976年黄河由刁口河改道现行清水沟流路以来,受流域水沙变化、人为干预和海洋动力作用的影响,现行河口北侧的孤东近岸海域冲淤格局不断发生改变。为了更好地了解近40年来孤东近岸的演变过程,本文基于研究区剖面水深地形和利津站水沙数据,分析1976-1986、1986-1996、1996-2002、2002-2014年四个不同阶段的冲淤演变及影响因素。结果表明:1)孤东近岸经历“强淤积-冲淤平衡-侵蚀-强侵蚀”四个阶段。孤东近岸海域由淤积向侵蚀转变始于1996年,且在2002-2014年间侵蚀最为严重,大部分近岸海域蚀深达到6~8 m,侵蚀最大深度超过8 m;2)等深线变化时空差异明显,蚀退最先出现在北侧,且近岸5 m水深区域内冲淤变化较水深10 m内敏感;3)研究区近岸侵蚀,离岸淤积,剖面冲淤平衡位置由CS19剖面的11 m水深变化到CS21剖面的5 m水深;4)黄河入海水沙的减少、河口人工改汊、孤东大堤建设和海洋动力作用都对孤东近岸的冲淤演变产生影响。维持研究区冲淤平衡的年均来沙阈值为3.78亿t/a。
关键词:  黄河三角洲  孤东近岸  冲淤演变  入海水沙  河口改汊
DOI:10.11759/hykx20180917001
分类号:
基金项目:
Coastal evolution and its influencing factors in the Gudong nearshore area of the Yellow River Delta
CHENG Hui,CHEN Shen-liang,XU Cong-liang,JI Hong-yu,FAN Yao-shen
1.State Key Laboratory of Estuarine and Coastal Research, East China Normal University;2.Institute of the Yellow River Estuary and Coast Science
Abstract:
Since the channel avulsion of Yellow River shifted from Diaokou course to Qingshuigou course in 1976, the morphological processes of Gudong have undergone tremendous changes owing to variations in fluvial water and sediment discharge, human activities and marine dynamics. This research analyzes the four stages of the morphological evolution of Gudong area based on measured bathymetric data and hydrological data at Lijin station. The major results showed that the nearshore area of Gudong has undergone four stages: rapid accretion stage, accretion-erosion adjustment stage, erosion stage and rapid erosion stage. This area has transformed from deposition to erosion since 1996, the erosion depth was about 6 to 8 m between 2002 and 2014, and it exceeded 8 m at the most serious erosion area. The isobath change has spatial and temporal differences, erosion began on the north. The change of erosion and deposition within 5 m depth area is more sensitive than 10 m. Erosion occurred in the nearshore zone while accretion in its offshore area. The balance depth of erosion and deposition changed from 11 m to 5 m. The morphological evolution of Gudong nearshore zone had influenced by the decrease of the Yellow River water and sediment discharge, diversion of river mouth channel, construction of Gudong dike and marine dynamics. Moreover, it is estimated that the sediment discharge threshold value in the study area was 3.78×10^8 t/a.
Key words:  Yellow River Delta  Gudong nearshore area  erosion and deposition evolution  water and sediment discharge  estuarine diversion
版权所有 《海洋科学》编辑部 Copyright©2008 All Rights Reserved
主管单位:中国科学院 主办单位:中国科学院海洋研究所
地址:青岛市南海路七号  邮编:266071  电话:0532-82898755  E-mail:bjb@qdio.ac.cn
技术支持:北京勤云科技发展有限公司