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《Acta Geographica Sinica》 2016-01
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Shape changes of major gulfs along the mainland of China since the early 1940s

HOU Xiyong;HOU Wan;WU Ting;Yantai Institute of Coastal Zone Research, CAS;University of Chinese Academy of Sciences;Key Laboratory of Coastal Environmental Processes and Ecological Remediation, CAS;  
Impacted by climate changes and human activities, the coastal zone of China has undergone various dramatic changes, among which, shape change of major gulfs(including bays and estuaries) is one of the most important aspects. In this paper, spatial dataset of gulf shoreline and gulf shape in seven phases since the early 1940 s was delineated based on topographic maps and remote sensing imageries, and a group of indices including the ratio of natural shoreline, the shoreline utilization degree, shoreline swing direction, gulf area, gulf shape index and gulf centroid were used to analyze the spatial-temporal characteristics of gulfs in detail. It turned out that: in general, shape changes of major gulfs in the mainland of China were significant and complicated during the past 70 years, specifically, visible changes of shoreline structure, especially the decreases in both length and ratio of natural shoreline took place; the shoreline utilization degree increased remarkably because more and more natural shoreline had been artificalized; the fact that shoreline seaward shift caused by sea reclamation occurred in the majority of gulfs; spatial size(area) decreased in most of gulfs due to the fast and extensive sea reclamation; the geometric shape of most gulfs had become more complicated while the discrepancies among all the gulfs were narrowed; the centroid of most gulfs moved toward the sea; gulf- shape variations exhibited remarkable spatio- temporal differences. It is obvious that human activities, especially sea reclamation, have become the key driving force of gulf shape change since 1990. Based on the above- mentioned findings,classification management strategy based on dominant- function oriented gulf classification is strongly recommended, and gulf- based management should be strengthen in order to improve the abilities of Integrated Coastal Zone Management(ICZM) practices in China.
【Fund】: 国家自然科学基金项目(31461143032);; 中国科学院重点部署项目(KZZD-EW-TZ-15 KZZD-EW-14);中国科学院战略性先导科技专项子课题(XDA05130703)~~
【CateGory Index】: P737.1
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【Co-citations】
Chinese Journal Full-text Database 6 Hits
1 ZHAI Jin-bo et al(College of Environmental Science and Engineering,Hohai University,Nanjing,Jiangsu 210098);Analysis on Development Process and Utilization Patterns of Coastal Beach Resources[J];Journal of Anhui Agricultural Sciences;2010-19
2 QUAN Feng,ZHU Lin*(College of Life Sciences,Hainan Normal University,Haikou 571158,China);The Methods of Coastal Ecosystem Health Assessment[J];Journal of Hainan Normal University(Natural Science);2011-02
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Chinese Journal Full-text Database 4 Hits
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