Journal of Geographical Sciences ›› 2019, Vol. 29 ›› Issue (12): 2031-2046.doi: 10.1007/s11442-019-1703-1

• Research Articles • Previous Articles     Next Articles

Dynamics of shoreline and land reclamation from 1985 to 2015 in the Bohai Sea, China

DING Xiaosong1,3, SHAN Xiujuan2,3(), CHEN Yunlong3, JIN Xianshi2,3, MUHAMMED Forruq Rahman3,4   

  1. 1. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
    2. Laboratory for Marine Fisheries Science and Food Production Processes; Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, Shandong, China
    3. Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs; Shandong Provincial Key Laboratory of Fishery Resources and Eco-environment; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, Shandong, China
    4. College of Fisheries, Ocean University of China, Qingdao 266003, Shandong, China
  • Received:2018-05-29 Accepted:2018-12-10 Online:2019-12-25 Published:2019-12-06
  • Contact: SHAN Xiujuan E-mail:shanxj@ysfri.ac.cn
  • About author:Ding Xiaosong (1993–), MS Candidate, specialized in shoreline change and land reclamation. E-mail: d_xiaosong@163.com
  • Supported by:
    The National Basic Research Program (973 Program) of China, No(2015CB453303);The Aoshan Scientific and Technical Innovation Program, No(2015ASKJ02-05);The Special Fund of the Taishan Scholar Project and the “Aoshan Talent” Project;Laboratory for Marine Fisheries Science and Food Production Processes;Pilot National Laboratory for Marine Science and Technology (Qingdao), No(2017ASTCP-ES07)

Abstract:

Extraction and analysis of the shoreline and land reclamation patterns are important for studies on topics such as the dynamics of coastal wetland ecological environments, transportation and exchange of material energy in coastal regions, and recruitment of fishery resources. Spatial-temporal variations in the shoreline and land reclamation in the Bohai Sea were analyzed based on 49 Landsat images of 7 periods from 1985 to 2015. The following conclusions were drawn. (1) The extracted shoreline data based on visual interpretation had high precision, and the shoreline extraction errors could be controlled within the theoretical range. (2) Over the past 30 years, the shoreline of the Bohai Sea has exhibited an average rate of change of 188.47 m/a and an average accretion distance of 3.55×10 3 m toward the sea. The fastest rate of shoreline change occurred in Laizhou Bay (134.78 m/a), followed by Bohai Bay (128.20 m/a) and Liaodong Bay (61.69 m/a). (3) The average rate of reclamation was 3.25×10 4 ha/a in the Bohai Sea, where the total area of aquaculture land, unused land, and salt land exceeded 60% of the total reclamation area. (4) The geometric shape of the bay became increasingly complicated from year to year, and the geometric center of gravity of the bay moved rapidly toward the sea. In addition, the area of the bay showed a significant decreasing trend. Therefore, to protect the function and structure of the ecosystem in coastal regions, we must control the scale and rate of land reclamation in the future.

Key words: shoreline change, land reclamation, shape index of the bay, Bohai Sea, China