摘要
收集了1976～2000年现代黄河三角洲地区的Landsat影像,采用平均高潮线法解译出25a来的海岸线,分析了现代黄河三角洲地区的岸线长度变化,迁移特征以及河口三角洲的时空发育规律。结果表明:现代黄河三角洲地区岸线变迁可以分为三部分:北部、中部和南部,其中中部是变化最剧烈的岸段。根据河道摆动规律和三角洲的延伸方向,现代黄河三角洲的发育可以分为四个阶段:填湾阶段(1976～1981年)、中部突出阶段(1981～1983年)、东南方向突出和鸟嘴状沙嘴形成阶段(1983～1996年)、河流改道和新沙嘴形成阶段(1996～2000年),四个阶段共淤积造陆378.2km2,侵蚀49.3km2,净增长328.9km2。此研究结果对于认识现代黄河三角洲的时空发育演变具有一定的意义。
Due to the Yellow River＇s huge sediment load, frequent floods, and shifts in course, shoreline of the Yellow River Delta changes quickly. To detect the shoreline migrations in the modern Yellow River Delta, a set of Landsat images from 1976 to 2000 were collected and shorelines were interpreted using HWL method. According to the shoreline migrations characteristics, the whole shoreline can he divided into three parts： north section, south section and central section. According to the river course oscillation and the delta progradation direction, the modern Yellow River Delta formation can be divided into four stages： bay silting stage （1976-1981）, central progradating stage （1981-1983）, southeast progradating and beak-shaped spit formation stage （1983-1996）, and river course shift and a new s＇pit forming stage （1996-2000）. During the four stages, with only about 49.3 km^2 eroded, there were 378.2km^2 new land formed, and net accretion area was 328.9 km^2. It is helpful to study the spatial and temporal formation pattern of the modern Yellow River delta.
出处
《海洋科学》
CAS
CSCD
北大核心
2009年第5期36-40,共5页
Marine Sciences
关键词
黄河三角洲
海岸线变迁
遥感
GIS
the Yellow River Delta
shoreline migration
remote sensing
GIS
