Spatio-temporal evolution analysis of the coastline inthe Pearl River Delta from 1973 to 2018

XIA Hantao; LONG Yuannan; LIU Cheng; LIU Xiaojian

doi:10.3969/j.issn.1001-909X.2020.02.004

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Journal of Marine Sciences ›› 2020, Vol. 38 ›› Issue (2) : 26-37. DOI: 10.3969/j.issn.1001-909X.2020.02.004

Spatio-temporal evolution analysis of the coastline inthe Pearl River Delta from 1973 to 2018

XIA Hantao^1,2, LONG Yuannan^*1,2, LIU Cheng³, LIU Xiaojian³

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Abstract

The Landsat TM/OLI remote sensing images from 1973 to 2018 were obtained as the data source by using the remote sensing and GIS technology. Based on the geographical background information, the spatial and temporal evolutions of the coastline in the Pearl River Delta region over 45 years were analyzed. The results show that the Pearl River Delta changed significantly, a large number of muddy coast changed into urban industrial coast and port coast. The artificialization index of Pearl River Delta coastline was rising, the types of coastline were developed in a diversified direction, the total length and fractal dimension of shoreline were increasing continuously, the main factors of increase shoreline length and fractal dimension were port construction, coastal industrial zone and reclamation.The evolution of the coastline had obvious regional characteristics, and the regions with large changes were mainly concentrated in Shenzhen Mirs Bay, Guangzhou Nansha and Zhuhai Doumen. From the perspective of the main structure of shoreline, each region presented different type changing tendency, substituted the natural shoreline, the industrial and port shorelines became the main type in each region. The intensity of development and utilization was increasing in various regions, among which the intensity of development in Shenzhen was growing the fastest. Social activities and location policies were the main driving factors for the evolution of shoreline.

Key words

Pearl River Delta / coastline / artificial coast / port shoreline / artificialization index

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XIA Hantao, LONG Yuannan, LIU Cheng, LIU Xiaojian. Spatio-temporal evolution analysis of the coastline inthe Pearl River Delta from 1973 to 2018[J]. Journal of Marine Sciences. 2020, 38(2): 26-37 https://doi.org/10.3969/j.issn.1001-909X.2020.02.004

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