近20年厦门市海岸线遥感监测与变迁特征分析

Analysis on Characteristics of Remote Sensing Monitoring and Change of Coastline in Xiamen City in Recent 20 Years

本文基于Landsat遥感数据提取厦门市1999年、2005年、2011年和2017年4期海岸线,并从岸线长度、年变化速率、陆地面积变化等方面对岸线变迁时空特征进行分析。结果表明,1999-2017年厦门市海岸线总长度增长29.82 km,陆地面积增加36.02 km2。其中,2011-2017年翔安区海岸线长度增加14.6 km,年变化速率为2.43 km/a;1999-2005年湖里区海岸线长度增加7.04 km,年变化速率为1.17 km/a;而其他地区变化相对不明显。总体上看,城镇扩张等人类活动是造成厦门市海岸线发生显著变化的重要原因,包括海沧区、翔安区、湖里区的沿海建设用地与港口的扩建以及翔安区东南侧水产养殖的扩张等。

Based on Landsat TM, ETM＋ and OLI images obtained from the Xiamen Region, the coastlines during four periods from 1999 to 2017 were extracted to analyze the changes in length and land area. The results showed that： the total length of coastline had increased 29.82 km, and the land area increased 36.02 km2. Specifically, the most significant change occured in Xiang＇an District with a length growth of 14.6 km and an annual average change rate of 2.43 km/a during 2011-2017. Additionally, the length growth in Huli District was 7.04 km, and the annual average change rate was 1.17 km/a during 1999-2005, while the changes in other districts were not obvious. In general, the coastline changes in 1999-2017 were mainly related to urban expansion and other human activities such as the expansion of coastal construction land and ports in Haicang, Xiang＇an and Huli districts, as well as the aquaculture expansion in the southeastern part of the Xiang＇an district.