地理学报

地理学报 ›› 2003, Vol. 58 ›› Issue (5): 749-756.doi: 10.11821/xb200305014

• 气候环境 • 上一篇    下一篇

山东莱州浅滩的沉积动态与地貌演变

王庆,杨华,仲少云,杜国云,张云吉,高光辰   

  1. 烟台师范学院地理与资源管理学院，海岸研究所，烟台 264025
  • 收稿日期:2002-12-20 修回日期:2003-05-22 出版日期:2003-09-25 发布日期:2003-09-25
  • 作者简介:王庆 (1968-), 男, 山东临沂人, 博士, 教授。主要从事河口海岸地貌研究, 发表论文30余篇。 E-mail:wang-qing@tom.com
  • 基金资助:

    山东省优秀中青年科学家项目资助(02BS121)

Sedimentary Dynamics and Geomorphic Evolution of the Laizhou Shoal

WANG Qing, YANG Hua, ZHONG Shaoyun, DU Guoyun, ZHANG Yunji, GAO Guangchen   

  1. Institute of Coastal Research, College of Geography and Resource Management, Yantai Normal University, Yantai 264025, China
  • Received:2002-12-20 Revised:2003-05-22 Published:2003-09-25 Online:2003-09-25
  • Supported by:

    Outstanding Young and Middle Aged Scientist Projects of Shandong Province, No.02BS121

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被引次数

50

摘要：

在野外观测和历史地貌调查的基础上，利用地理信息系统和遥感技术，研究了现代莱州浅滩的地貌演变规律和人类活动对浅滩地貌冲淤动态的影响。结果表明，受其特有的沉积动力过程控制，莱州浅滩不断淤高并向东北迁移、西北延伸。1958年以来由于修建水库、码头和海底采沙等人类活动导致泥沙亏损，浅滩在继续向东北迁移、西北延伸的同时，总体上处于侵蚀、解体状态，在中部和近岸部分之间、近岸部分和刁龙嘴海岸之间先后形成了贯通的潮流槽，不同地貌部位冲淤状态存在差异。

关键词: 莱州浅滩, 地理信息系统, 沉积动力过程, 人类活动, 地貌演变

Abstract:

Based on field work and historical geomorphic analysis, and supported by GIS and RS, this paper has researched the geomorphic dynamic characteristics and evolution rules and the artificial effects on erosion and deposition of the Laizhou shoal since 1958, when many reservoirs were built, and a great amount of sand began to be reduced. The results show that the Laizhou shoal has been moving northward while the nearby Diaolongzui spit moving northward because of the geomorphic-dynamics between them since the mid-19th century. The sand made up of the shoal has come directly from the Diaolongzui coast, and ultimately from the rivers which empties into the Bohai Sea across the NE direction stretching coast from the Diaolongzui spit to the Qimudao island. There are two main depositional dynamic mechanisms, which have been controlling the shoal erosion and deposition processes. One is that when the ebb tidal current from the south-west Laizhou bay is retarded by the shoal, it turns to flow along the west-northern striking shoal with a secondary transverse circulation made up of shoalward currents in the bottom and upwelling currents near the shoal. So, erosion took place on the SW part, and deposition on the top part of the shoal, which led to the shoal migrating toward NE as a whole. Another is that the centrifugal effect of tidal currents around the pointed end of the shoal causes a secondary circulation made up of shoalward currents in the bottom and upwelling currents in the upper. So, the suspended sand deposits on the NW part of the shoal.

Key words: Laizhou shoal, GIS, geomorphic evolution, deposition dynamic process, human