基于遥感和GIS技术的辽河三角洲岸线变迁与成因分析

An analysis of shoreline changes in Liaohe River delta based on remote sensing and GIS technology

利用遥感影像的时空分布特点,选择1970—2010年间的5期遥感影像资料对辽河三角洲地区的岸线变迁进行遥感解译。结果显示,每2期相邻影像所在时段内均有新增土地。4个时段新增陆地面积具体为:1970—1980年间,15.52km2;1980—1990年间,40.55km2;1990—2000年间,70.14km2;2000—2010年间,17.33km2。通过自然因素与人类活动影响2个方面,进一步对岸线变迁的成因进行了分析。

For the purpose of investigating the temporal and spatial characteristics of remote sensing images, the authors selected imag-es of five periods taken from 1970 to 2010 to interpret the shoreline migrations in Liaohe River delta. The result indicates that in ev-ery time interval of two neighboring images, there emerged a newly accumulated land, whose area was 15.52km^2 from 1970 to 1980, 40.55km^2 from 1980 to 1990, 70.14km^2 from 1990 to 2000, and 17.33km^2 from 2000 to 2010, respectively. The factors responsible for shoreline migrations are analyzed in the aspects of native influence and human activity.