Coastline investigation and evaluation and natural coastline retention rate estimation in Tangshan based on marine functional zoning

On the background of the compilation of a new round MFZ(marine functional zoning) in Tangshan, this paper take the method of integrating onsite survey and remote sensing survey, comprehensively considers the status quo of marine development and utilization, marine natural environment, social needs, economic and technical feasibility, then evaluates the existing natural coastline in Tangshan and defined the coastline should be restored and the coastline would have ecological function like natural coastline after being restored. On the basis of that, this paper gives the index of NCRR (Natural Coastline Retention Rate) in Tangshan. It indicates that, Tangshan holds 14.9 kilometers natural coastline (including the coastline with ecological function after being restored), and 60 kilometers coastline should be restored, 45.1 kilometers coastline would have ecological function like natural coastline after being restored.