【摘要】 本文以1976年至2002年间18景多时相遥感影像为主要数据源,在遥感与GIS技术的支持下,对影像进行几何校正与配准,并运用近红外波段的水体反射辐射率明显单一并低于其他地物的特性提取了逐年河口海岸的平均高潮线,另外经GIS叠加分析计算等获取了海岸线时空变化的数据,进一步分析了海岸线的演变过程,并根据河口来水来沙等条件提出了防止海岸蚀退的对策。更多还原

【Abstract】 This study analyzed the coastline change in the Yellow River Estuary by using 3S techniques and GIS overlay analysis with basic landsat TM images obtained from 1976 to 2002 respectively. Some 3S software, such as Erdas 8.6, Arcview 3.3, and Arcinfo 8.2, were used as interpretation and analysis tools to realize image geometric correction and matching. The coastlines were extracted by using the characteristic that the near infrared of water is obviously under the others. The coastline spatial-temporal data were obtained after GIS overlay analysis. Finally, the paper discussed the countermeasure to avoiding the heavy erosion of the coast in the Yellow River delta.更多还原