Coastline Remote Sensing Monitoring and Change Analysis of Laizhou Bay from 1978 to 2009

摘要

Coastline of Laizhou Bay was affected by natural and anthropogenic factors and changed severely in the last 31 years. It has great significance to monitor Laizhou Bay coastline change for coastal zone protection and utilization. Based on the extraction of coastline information by selecting 8 remotely sensed images of MSS and TM in the year of 1978, 1989, 2000 and 2009, changes of coastline of Laizhou Bay is analyzed. The results show that: (1) The whole coastline of Laizhou Bay kept lengthening with the speed of 6.04 km/a; (2) The coastline moved 959.2241 km~2 seaward and 0.4934 km~2 landward, that is, 958.7307 km~2 land area increased in total; (3) Transformation of coastline types is mainly from natural types to artificial types. Base on the results, key reasons of the changes of coastline are analyzed, which revealed that, change of the conditions of sediment deposition, construction and extension of saline, cultivated fields and harbors were the main driving factors causing the change of Laizhou Bay coastline.