Spatial and temporal dynamics of sandy coastal geomorphology in the east of Laizhou Bay over recent 60 years
-
摘要: 在野外考察的基础上,以不同时期测量和成像的海图、地形图和高分辨率遥感影像为数据源,综合使用数字岸线分析、遥感、地理信息系统等方法,对近60年来莱州湾东部砂质海岸(界河口-刁龙嘴)地貌演变进行研究。结果表明,研究期内莱州湾东部岸线迁移和水下岸坡冲淤存在强烈的时空差异。岸线迁移表现为冲淤进退交替发生,其在时间过程上具有非线性的显著特点。1959-2013年,侵蚀岸线所占比例波动起伏,具有阶段性。侵蚀岸段年均演变速率以1985年为界分成两个阶段,前期由极大值4.95 m/a(1959-1969年)锐减至极小值1.97 m/a(1969-1985年),后期由1.97 m/a增大到4.43 m/a(1985-1998年),之后均处于高强度侵蚀。岸线迁移空间分布的差异性主要表现在4个岬湾的岸线变迁特征与莱州湾东岸岸线整体变迁并不一致。同时,水下岸坡冲淤条带大体相间分布,同一岸段1959-1985年和1985-2008年的冲淤演变趋势基本相反。进一步分析表明最近60年来,莱州湾东部砂岸在水库拦沙、潮上带工厂化水产养殖、大型海岸工程等人类活动的地貌效应共同控制下,发生了5次岸线淤积前进与侵蚀后退以及冲淤速率大小的交替。Abstract: Based on the results of field surveys, the spatial and temporal dynamics of sandy coastal geomorphology along the eastern Laizhou Bay over the last 60 years was investigated using the comprehensive methods of digital shoreline analysis, remote sensing and geographic information system technologies. The data mainly derived from the nautical charts, topographic maps and high resolution remote sensing images which measured and imaged in different periods. The results show that there are significant spatial-temporal variations in both the sandy coast shoreline migration and the subaqueous slope erosion-deposition evolution along the eastern Laizhou Bay. The alternate regulation of forward and backward for shoreline migration is caught in this study. There is a remarkable non-linear characteristic in the time process. The proportion of the erosional shoreline is fluctuated and phased from 1959 to 2013. The average annual evolution rate of eroded coast is divided into two stages by 1985. The erosion rate decreased from the maximum value of 4.95 m/a (during the period of 1959-1969) to minimum value 1.97 m/a (1969-1985) at prophase. In the late period, the erosion rate increased from 1.97 m/a to 4.43 m/a (1985-1998), and the coast was in serious erosion state since then. The characteristics of shoreline migration in four headland bays are not consistent with overall trend. At the same time, the scouring strips distribute alternating with the silting of the subaqueous slope. The trend of scouring and silting evolution was basically opposite in the same coast between the periods of 1959-1985 and 1985-2008. Further analysis indicate that there are 5 alternations of erosion and deposition and the changes of rate of erosion and siltation, under the control of geomorphic effects of anthropogenic activities such as sediment trapping by reservoirs, fishing culture in supratidal zone and coastal engineering, in the east of Laizhou Bay during recent 60 years.
-
Key words:
- sandy coast /
- shoreline /
- subaqueous slope /
- geomorphic evolution /
- anthropogenic activities
-
Aiello A, Canora F, Pasquariello G. et al. Shoreline variations and coastal dynamics:A space-time data analysis of the Jonian littoral, Italy[J]. Estuarine, Coastal and Shelf Science, 2013, 129:124-135. Brooks S M, Spencer T. Shoreline retreat and sediment release in response to accelerating sea level rise:measuring and modelling cliffline dynamics on the Suffolk Coast, UK[J]. Global and Planetary Change, 2012, 80:165-179. Kankara R S, Selvana S C, Markosea V J, et al. Estimation of long and short term shoreline changes along Andhra Pradesh coast using Remote Sensing and GIS techniques[J]. Procedia Engineering, 2015, 116:855-862. Kuleli T, Guneroglu A, Karsli F, et al. Automatic detection of shoreline change on coastal Ramsar wetlands of Turkey[J]. Ocean Engineering, 2011, 38(10):1141-1149. 仲少云, 王庆, 战超, 等. 最近50年来莱州湾东部典型砂岸潮上带土地利用变化研究[J]. 海洋与湖沼, 2015, 46(2):410-419. Zhong Shaoyun, Wang Qing, Zhan Chao, et al. Changes in land-use of the supratidal zone of typical sandy coast along eastern Laizhou Bay in recent 50 years[J]. Oceanologia et Limnologia Sinica, 2015, 46(2):410-419. 蔡月娥, 蔡爱智. 莱州湾东岸的地貌发育[J]. 海洋湖沼通报, 1980, 2(1):28-34. Cai Yue'e, Cai Aizhi. Development of geomorphology on the eastern coast of Laizhou Gulf, Shandong[J]. Transactions of Oceanology and Limnology, 1980, 2(1):28-34. 李善为, 夏东兴.山东海岸地貌发育特征[J]. 海洋湖沼通报, 1981, 3(3):39-45. Li Shanwei, Xia Dongxing. Study on geomorphological development characteristics along the Shandong coast[J]. Transactions of Oceanology and Limnology, 1981, 3(3):39-45. 庄振业, 鞠连军, 冯秀丽, 等. 山东莱州三山岛-刁龙嘴地区沙坝泻湖沉积和演化[J]. 海洋地质与第四纪地质, 1994, 14(4):43-52. Zhuang Zhenye, Ju Lianjun, Feng Xiuli, et al. Barrier lagoon sedimentation and evolution in Sanshan island-Diaolongzui area, Laizhou, Shandong[J]. Marine Geology & Quaternary Geology, 1994, 14(4):43-52. 王庆. 全新世中期以来山东半岛东北岸相对海面变化与海积地貌发育[J]. 地理研究, 1999, 18(2):122-129. Wang Qing. Influence of the middle and later Holocene relative sealevel change on the coastal geomorphic evolution along the north eastern Shandong peninsula[J]. Geographical Research, 1999, 18(2):122-129. 王庆, 王圣洁. 晚更新世以来山东半岛北部沿海地区的构造抬升速率[J]. 海洋地质与第四纪地质, 1998, 8(3):71-77. Wang Qing, Wang Shengjie. The tectonic uplift rate of coastal area along the northern Shandong peninsula in Late Pleistocene epoch[J]. Marine Geology & Quaternary Geology, 1998, 8(3):71-77. 杜国云.山东半岛新构造东西分异的水系特征统计分析[J]. 北京大学学报, 2001, 37(3):407-412. Du Guoyun. Statistical analysis of the river networks on neotectonic divergency of east and west parts in Jiaodong Peninsula[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2001, 37(3):407-412. 庄振业, 许卫东, 李学伦. 渤海南岸6000年来的岸线演变[J]. 青岛海洋大学学报, 1991, 2(2):99-110. Zhuang Zhenye, Xu Weidong, Li Xuelun. The coastline evolution on the south coast of the Bohai sea since 6 ka B.P.[J]. Journal of Ocean University of Qingdao, 1991, 2(2):99-110. 中国海湾志编委会. 中国海湾志(第三分册)[M]. 北京:海洋出版社, 1993:1-81. Editorial Board of China Bay Survey. Survey of China Bays (Vol.3)[M]. Beijing:China Ocean Press, 1993:1-81. 庄振业,陈卫民,许卫东, 等. 山东半岛若干平直砂岸近期强烈蚀退及其后果[J]. 青岛海洋大学学报, 1989, 19(1):90-98. Zhuang Zhenye, Chen Weimin, Xu Weidong, et al. Retrogression of straight sandy beaches in the Shandong peninsula and it's results[J]. Journal of Ocean University of Qingdao, 1989, 19(1):90-98. Ahmad S R, Lakhan V C. GIS-based analysis and modeling of coastline advance and retreat along the Coast of Guyana[J]. Marine Geodesy, 2012, 35(1):1-15. Hakkou M, Castelle B, Benmohammadi A, et al. Wave climate and morphosedimentary characteristics of the Kenitra-Bouknadel sandy coast, Morocco[J]. Journal of Environment Earth Science, 2011, 64(7):1729-1739. Olusegun A D, Qiao Lulu, Ding Dong, et al. Evolutionary trends of the Niger Delta shoreline during the last 100 years:Responses to rainfall and river discharge[J]. Marine Geology, 2015, 367:202-211. Moussaid J, Fora A A, Zourarah B, et al. Using automatic computation to analyze the rate of shoreline change on the Kenitra coast, Morocco[J]. Ocean Engineering, 2015, 102:71-77. 陈吉余. 中国海岸侵蚀概要[M]. 北京:海洋出版社, 2010:56-78. Chen Jiyu. Summary of Coastal Erosion in China[M]. Beijing:China Ocean Press, 2010:56-78. 王庆. 全新世以来山东半岛东北部海面变化的河流地貌响应[J]. 地理科学, 1999, 19(3):226-231. Wang Qing. Fluvial geomorphic response to the Holocene relative sea level changes along the northeastern Shandong peninsula[J]. Scientia Geographica Sinica, 1999, 19(3):226-231. 王庆, 刘建华. 汉代以来胶东半岛人口发展及人-地-海关系演变[J]. 鲁东大学学报, 2006, 23(3):6-10. Wang Qing, Liu Jianhua. The population development and the evolution of man-land-sea relationship in Jiaodong Peninsula since the Han Dynasty[J]. Journal of Ludong University, 2006, 23(3):6-10. 李雪艳, 王庆, 王红艳, 等. 莱州湾东部潮上带土地利用对海岸蚀退的影响[J]. 海洋与湖沼, 2015, 46(6):1347-1357. Li Xueyan, Wang Qing, Wang Hongyan, et al. Impacts of land use on coastal erosion in the upper tidal zone of the Laizhou Bay[J]. Oceanologia et Limnologia Sinica, 2015, 46(6):1347-1357.
点击查看大图
计量
- 文章访问数: 800
- HTML全文浏览量: 20
- PDF下载量: 764
- 被引次数: 0