Shape changes and driving factors of Zhifu Bay in Yantai from 1975 to 2020

doi:10.13474/j.cnki.11-2246.2023.0097

Abstract

Abstract: The bays are major places for comprehensive development and utilization of coastal zone, and study on the shape change and driving factor of the bays will help to provide a scientific basis for their development, utilization, protection and restoration. Taking the Zhifu Bay(ZFB) as the research object, its spatial information of 10 time phases from 1975 to 2020 is extracted from Landsat remote sensing images, and its shape changes, characteristics and driving factors are analyzed from four aspects: the degree of shoreline development and utilization, the area of ZFB, the shape of ZFB, as well as the distribution of centroid of ZFB. The results show that since 1975, the shape change of ZFB in the study area has been significant and complex. The development and utilization of the gulf shoreline continue to increase, and the shoreline generally moves from land to the sea; the area of ZFB gradually shinks, decreasing by 8.82 km² in 45 years, accounting for 25.99 % of the total area in 1975; the shape index of ZFB increases from 1.33 to 2.23, and the bay shape tends to be complex; during the study period, the centroid of ZFB has generally migrated to the sea by 647.79 m. In general, the reclamation for port terminals and coastal culture pond is an important reason for the changes of ZFB.

Key words: remote sensing, geographic information system, Zhifu Bay, gulf shape, driving factors

CLC Number:

P237

WANG Han, LIU Ning, XUE Yan, SUN Guiqin, WEI Xiao, XU Yandong. Shape changes and driving factors of Zhifu Bay in Yantai from 1975 to 2020[J]. Bulletin of Surveying and Mapping, 2023, 0(4): 10-15.

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