1991—2015年唐山市海岸线时空变化遥感分析

Remote Sensing Analyses of the Spatial and Temporal Changes in Tangshan Shoreline from 1991 to 2015

文章利用1991年、2000年、2006年、2010年和2015年5个时相的遥感影像,开展了近20余年唐山市海岸线的变迁及驱动力分析。得出结论如下:(1)1991—2015年间唐山市海岸带岸线总长度从273km增长到449km,年平均增长7.33km;(2)1991—2015年间唐山市岸线利用类型增加了3类,人工岸线长度增加了190.36km,占比增加了6.22%;(3)工业用岸线为增长最快的岸线,长度从15.32km增长为221.00km,增长了205.68km,渔业用岸线为减少最快的岸线,长度由222.72km减少为158.60km,减少了64.12km;(4)唐山市海岸带淤积面积为4.0×105 hm2,侵蚀面积为670hm2,岸线平均变化速率为605.44m/a;(5)曹妃甸港区、京唐港等建设是导致唐山市海岸线变迁的主要原因。

Five years remote sensing images of the changing characteristics and driving force 1991 , 2000, n Tangshan 2006,2010,2015 were used to analyze the past 24 years. The result showed that： （1） the overall length of Tangshan coastline increased from 273km to 449km from 1991 to 2015 and the average annual growth was 7.33km.（2） Three types of shoreline had been increased and the length of artificial shoreline increased 190.36km during the period of 1991 2015.（3） Industrial shoreline had the fastest growth and its length increased from 15.32 km to 221.0 kin,which had been increased 205.68 km.Fishin and its length dreaded from 222.72 km to 158.6 kin,which ha g d shoreline had the fastest decrease decreased 64.12 kin.（4） The dep osition area of Tangshan was 4.0×10^5; ha and the erosion area of Tangshan was 670 ha. Average expansion rate for shoreline in Tangshan was 605. 44 m/a.（5） Coastal zone exploitation was the main reason that caused shoreline change in Tangshan.