现代黄河三角洲河口段海岸线演变特征

Characteristics of Shoreline Evolution at the Current Yellow River Estuary

运用遥感和地理信息系统相结合的方法研究了黄河三角洲河口段1976—2008年海岸线变迁及岸滩淤蚀面积的变化,通过对不同时相遥感影像数据的解译,提取一般高潮线,在GIS支持下进行了分析计算,获得了海岸线时空变化数据。结果表明:黄河三角洲河口段1976—1987年造陆面积最大,平均每年增加21.65 km2,清8出汊后1996—2008年造陆面积为负值,陆地面积共减少22.36 km2。

The paper studies the variations of shoreline and the area of deposition and erosion of shore and beach of the Yellow River estuary section during the period of 1976-2008 by using the combined method of remote sensing and GIS,extracts normal high-water mark through the interpretation of different time phase of remote sensing image data,conducts analysis and calculation with the support of GIS and obtains temporal and spatial variation data of shoreline.The outcomes show that the land area created at the estuary of the Yellow River delta in 1976-1987 periods is the maximum,increasing 21.65 km2 per year in average.The created land area is negative value in 1996-2008 periods when Qingba anabranch has a by-pass,reducing 22.36 km2 land area in total.