胶州湾冲淤灾害地质及环境稳定性分析

doi:10.11821/yj2011070002

地理研究 ›› 2011, Vol. 30 ›› Issue (7): 1169-1177.doi: 10.11821/yj2011070002

胶州湾冲淤灾害地质及环境稳定性分析

刘运令¹, 汪亚平¹, 高建华¹, 贾建军², 夏小明², 李炎³

1. 南京大学海岸与海岛开发教育部重点实验室, 南京 210093;
2. 国家海洋局第二海洋研究所, 杭州 310012;
3. 厦门大学近海海洋环境科学国家重点实验室, 厦门 361005

收稿日期:2010-08-03 修回日期:2010-10-12 出版日期:2011-07-20 发布日期:2011-07-20
通讯作者: 汪亚平(1972-),男,云南玉溪人,教授,主要从事海洋沉积动力学、自然地理学研究。 E-mail: ypwang@nju.edu.cn
作者简介:刘运令(1979-),男,山东平邑人,博士研究生,主要从事海洋地质学研究。E-mail: liuyunling006@163.com
基金资助:
国家"九〇八"(908-02-03-08);浙江省自然科学基金重点项目(ZS080241);国家自然科学基金项目(40776049)

The environmental stability and the hazardous geology in seabed erosion and deposition of Jiaozhou bay

LIU Yun-ling¹, WANG Ya-ping¹, GAO Jian-hua¹, JIA Jian-jun², XIA Xiao-ming², LI Yan³

1. Key Laboratory of Ministry of Education for Coast and Island Development, Nanjing University, Nanjing 210093, China;
2. Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;
3. State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, Fujian, China

Received:2010-08-03 Revised:2010-10-12 Online:2011-07-20 Published:2011-07-20

摘要/Abstract

摘要： 通过对胶州湾1936~2002年4期海图的地形对比和1986年、2007年2期Landsat-5 TM影像的对比,分析了近70多年来胶州湾的冲淤灾害地质形势。根据胶州湾近百年来的沉积速率特征将其冲淤灾害形势划分为9类,结果表明:胶州湾在1936~1963年间总体呈现轻微淤积态势,但显浪-红岛连线以东区域(含沧口水道)以轻微侵蚀为主。与前期相比,胶州湾在1963~1982年间的淤积强度明显减弱,基本由轻微淤积转为冲淤平衡状态。该时期内沧口水道转为以较强淤积为主,大沽河水道和岛耳河水道处于大面积轻微侵蚀状态。胶州湾在1986~2007年间多数岸段向海显著淤长,岸线的平均淤进速率为10¹~10²m/a;海床总体上呈轻微侵蚀状态。此外,根据对均衡态下潮汐汊道P-A关系的分析,胶州湾近70年来口门的潮流振幅和相应的等效摩阻系数都呈减小趋势,这表明胶州湾口门的不稳定性逐渐增加。

关键词: 灾害地质, 冲淤强度, 潮流振幅, 等效摩阻系数, 胶州湾

Abstract: Based upon the comparisons between underwater bathymetries digitized from nautical charts (1936-2002) and between coastlines derived from two landsat-5 TM images (1986-2007), the hazardous geology associated with erosion and deposition was analyzed for the past 70 years. During the last century, the sedimentary pattern was divided into nine types according to the depositional rates. The results show that the slight sedimentation happened as a whole in Jiaozhou bay from 1936 to 1963, while the slight erosion appeared in the eastern embayment (including Cangkou channel). Unlike before, the deposition obviously decreased from 1963 to 1982 and then the sedimentary environment transferred into the equilibrium. Besides, the strong sedimentation was dominant in Cangkou channel during this period. However, the Daguhe and Daoerhe channels were slightly eroded. Subsequently, most of coasts extended obviously towards the sea between 1986 and 2007; the average coastline extending rate was 10¹~10² m yr^-1 and the slight erosion was observed on the seabed. Moreover, the analysis of tidal prism and cross-sectional area of tidal inlets shows that the current velocity amplitude and the corresponding equ-coefficient of friction had decreased over the past 70 years in Jiaozhou bay. This indicates that the entrance of Jiaozhou bay tended to be relatively instable.

Key words: hazardous geology, intensity of erosion and siltation, current velocity amplitude, equ-coefficient of friction, Jiaozhou bay

刘运令, 汪亚平, 高建华, 贾建军, 夏小明, 李炎. 胶州湾冲淤灾害地质及环境稳定性分析[J]. 地理研究, 2011, 30(7): 1169-1177.

LIU Yun-ling, WANG Ya-ping, GAO Jian-hua, JIA Jian-jun, XIA Xiao-ming, LI Yan. The environmental stability and the hazardous geology in seabed erosion and deposition of Jiaozhou bay[J]. GEOGRAPHICAL RESEARCH, 2011, 30(7): 1169-1177.

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胶州湾冲淤灾害地质及环境稳定性分析

The environmental stability and the hazardous geology in seabed erosion and deposition of Jiaozhou bay

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