近30年长江北支口门附近的冲淤演变及其对人类活动的响应

王如生; 杨世伦; 罗向欣; 陆叶峰; 苗丽敏

doi:10.3969/j.issn.1000-5641.2015.04.005

近30年长江北支口门附近的冲淤演变及其对人类活动的响应

doi: 10.3969/j.issn.1000-5641.2015.04.005

1.
华东师范大学河口海岸学国家重点实验室,上海200062;
2.
中山大学海洋学院河口海岸研究所,广州510006

基金项目:

国家自然科学基金(41130856);上海市科委项目(128014327);河口海岸学国家重点实验室自主课题(SKLEC2012KYYW06)

详细信息

作者简介:
王如生，男，硕士研究生，研究方向为河口海岸动力沉积地貌. E-mail: wrs0812@163.com.

通讯作者:
杨世伦，男，教授，研究方向为海岸沉积动力学和地貌学.

中图分类号: K903
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出版历程
- 收稿日期: 2014-08-19
- 刊出日期: 2015-07-25

Morphological evolution and human activities impacts at the mouth area of the North Branch, Yangtze estuary, during the recent three decades

摘要

摘要: 根据19812012年长江北支口门附近的海图以及遥感数据，利用ArcGIS技术进行计算分析，以了解近30年该区域的冲淤演变特点和规律，从而丰富海岸带陆海相互作用的研究案例.结果表明：19811997年潮间带围垦面积为13 km2, 水域平均淤积速率为1.4 cm/a; 19972012年, 潮间带围垦面积为163 km2，水域平均冲刷速率为-7.1 cm/a.31年间，口门内、外水域的淤积速率分别为0.77 cm/a和-1.97 cm/a.结论包括：近30年研究区的冲淤演变受到北支衰亡趋势、口内滩涂促淤围垦和长江流域建坝等引起的入海泥沙通量下降的影响，其中人类活动是近15年研究区冲淤演变的控制性因子.
- 河口 /
- 地貌 /
- 冲淤演变 /
- 长江口北支 /
- 人类活动影响
Abstract: In order to enrich the knowledge of landocean interaction, this paper examined the recent accretion and erosion at the mouth area of the North Branch, the Yangtze Estuary, based on bathymetric and remote sensing data and using ArcGIS techniques. The results show that: (1) from 1981 to 1997, 13 km2 of intertidal area was reclaimed; an average accretion rate of 1.4 cm/yr was observed in the subtidal area. (2) from 1997 to 2012, 163 km2 of intertidal zone was embanked, and an average erosion rate of -7.1 cm/a was found in the subtidal area. (3) Between 1981 and 2012, an average accretion rate of 0.77 cm/a was found in the inner portion, and an average erosion rate of -1.97 cm/a occurred in the outer portion. We concluded that the morphological evolution in the study area was controlled by three factorsthe silting trend of the North Branch, the intertidal accretionpromoting projects, and dam construction within the Yangtze watersheds. During the recent 15 years, human activities were the dominant factor.
- estuarygeomorphologyerosion and accretionnorth branch of the yangtze riverhuman impacts /

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参考文献(1)

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