近30年辽河口盖州滩沉积环境研究

发布时间：2018-01-01 00:09

本文关键词：近30年辽河口盖州滩沉积环境研究　出处：《海洋学报》2017年07期 　论文类型：期刊论文

更多相关文章： 辽河口 盖州滩 地貌演化 沉积速率

【摘要】：对采自辽河口盖州滩北部柱状样进行沉积物粒度分析和~(137) Cs、~(210) Pb年代测试,结合1988年、1994年、1999年和2013年4期遥感影像数据,对近30年盖州滩沉积环境进行了研究。沉积物样品主要为砂质粉砂和粉砂,分选较差,极正偏,峰态很窄至宽。近30年来盖州滩沉积速率为2.83cm/a,沉积较为快速。1969年,盘山建闸后,虽然辽河入海径流量和输沙量减少,盖州滩沉积物粒度仍受到径流、潮流和波浪的共同影响,以径流影响为主;1999年,辽河截流后,径流影响较弱,潮流和波浪对沉积物改造作用增强。盖州滩发育过程受到径流、潮流和波浪以及人类活动的共同影响,但近30年来盖州滩主体形态无明显变化,仅北部沙洲不断淤高,与主沙体连为一起,南部受波浪改造呈鸟足状。
[Abstract]:The sediment grain size analysis and the dating test of Cs137Cszhuanjin210Pb from the columnar samples collected from the northern Gaizhou beach of Liaohe estuary were carried out, combined with the data from 1988 and 1994. In 1999 and 2013, four issues of remote sensing image data were used to study the sedimentary environment of Gaizhou beach in recent 30 years. The sediment samples were mainly sandy silt and silt with poor sorting and very positive deviation. The peak state is very narrow to wide. In recent 30 years, the deposition rate of Gaizhou beach is 2.83 cm / a, the deposition rate is relatively fast. In 1969, after the construction of Panshan sluice, the runoff and sediment transport of Liaohe River into the sea decreased. The grain size of sediment in Gaizhou beach is still affected by runoff, tidal current and wave, mainly by runoff. In 1999, after the closure of Liaohe River, the influence of runoff was weak, and the effect of tidal current and wave on sediment transformation was enhanced. The development process of Gaizhou beach was affected by runoff, tidal current and wave, as well as human activities. However, in the past 30 years, the main body of the beach in Gaizhou has no obvious change, except that the sand banks in the north have been silt continuously, connected with the main sand body, and the south has been transformed by waves in the form of bird feet.
【作者单位】：中国地质大学(北京)海洋学院;厦门大学海洋与地球学院;
【基金】：国土资源部地质环境治理专项子课题;辽河油田地质环境治理效果定量评价研究
【分类号】：P736.21
【正文快照】： 1引言海岸带是人类生存和发展的主要活动区域之一,受全球气候变化、陆地变化、河流变迁、海平面上升以及人类活动的影响,具有敏感性、复杂性和多变性。河口地区因受入海河流和海洋动力的双重作用,其沉积特征能反映河口地区河流、波浪、潮汐等作用的变化。20世纪80年代初,国家

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