Geometric parameters of shoreface profiles of Laptev Sea erosion coast (Table 1)

Field investigations of the Laptev Sea shoreface morphology were carried out (1) off erosional shores composed of unconsolidated sediments, (2) off the modern delta shores of the Lena River, and (3) off rocky shores.
It was found that profiles off erosional shores had a concave shape. This shape is not well described by commonly applied power functions, a feature, which is in disagreement with the generally accepted concept of the equilibrium shape of shoreface profiles. The position of the lower shoreface boundary is determined by the elevation of the coastal lowland inundated during the last transgression (at -5 to -10 m) and may easily be recognized by a sharp, an order of magnitude decrease in the mean inclination of the sea floor. The mean shoreface inclination depends on sediment grain-size and ranges from 0.0022 to 0.033. The concave shape of the shoreface did not change substantially during the last 20-30 years, which indicates that shoreline retreat did not slow down and hence suggests continued intensive coastal erosion in the 21st century. […]

对拉普捷夫海岸线形态的实地调查包括：（1）由松散沉积物构成的侵蚀海岸；（2）勒拿河现代三角洲海岸；（3）岩石海岸。研究发现，侵蚀海岸的剖面呈凹形，这种形状无法由常用的幂函数很好地描述，这一特征与海岸剖面平衡形状的普遍接受概念存在分歧。下岸线的位置由最后一次海侵期间淹没的沿海低地的海拔高度决定（-5至-10米），并且可以通过海床平均倾斜度的急剧、数量级上的降低轻易识别。平均岸线倾斜度取决于沉积物颗粒大小，范围为0.0022至0.033。在过去20至30年中，岸线的凹形并未发生实质性变化，这表明海岸线后退并未减缓，从而暗示21世纪将继续发生强烈的海岸侵蚀。