Analysis of shoreline changes and environmental impact effects in Tangshan city

The research interpreted the five different periods of remote sensing data from 1979 to 2012 in Tangshan, and the results showed that the coastline length had increased 81.8 km in 33 years. The shoreline changes which were affected by human activities mainly corresponded to the economic development of three periods: from 1979 to 1991, the marine industry and aquaculture were from the beginning stage to the quick developing stage, while the artificial coastal embankment such as salt fields and culture pond increased rapidly; from 1991 to 2000, the port was in the primary step of development,and the marine industry and aquaculture were in the stably developing stage, while the embankment increased slowly; from2000 to 2012, the major projects such as Caofeidian industry park and Tangshan port developed rapidly, while the embankment increased quickly. Affected by the shoreline changes, the barrier-lagoon system along the coast in Tangshan was damaged, and the marine hydrodynamic conditions in Caofeidian sea area changed. It was estimated that the coastline of Tangshan would continue to increase with the costal economy development up to 2020.