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本文研究近代黄河三角洲地区的潮滩地貌及其沉积。由于作用于潮滩上的水动力强度和潮滩被海水淹没时间的差异,潮滩地貌及其沉积具有明显的水平分带性,自陆向海依次为高、中、低潮滩,它们具有各自的微地貌,相应地,潮滩沉积为泥滩带、泥沙混合带和粉砂带。沉积物的粒度组分、粒度参数和沉积构造也具有一定的变化规律。随着黄河入海口位置的移动,海洋动力和海域来沙条件的变化,在潮滩垂向上形成淤进层序和蚀退层序。
This paper studies the tidal flat landforms and their sediments in modern Yellow River Delta. Because of the hydrodynamic intensity acting on the tidal flats and the time difference between tidal flats and submerged seawater, the tidal flat and its sediments have obvious horizontal zonality. From the ocean to the sea, they are high, medium and low tide beaches, and they have their own micro Landforms, correspondingly, tidal flat sediment for mudflats, sediment mixed belt and silt belt. Sediment grain size components, grain size parameters and sedimentary structure also has a certain variation. With the movement of the position of the Yellow River into the sea, the motive force of the sea and the change of sea and sand conditions, silt-up and eroded sequences are formed vertically on the tidal flat.