Abstract The coastal zone is a very dynamic region, constantly seeking to reach a state of equilibrium due to variations in the external forces. The shallow zone along the inner continental shelf known as the shoreface, can be divided into the upper and lower shoreface. While the former responds to processes operating across time spans ranging from that of a single event, such as storm, through to seasonal variations in environmental conditions, the latter evolution's occurs in geological scale, more in response to mean trends in environmental conditions (decades to millennia). These zones are connected via sedimentary exchanges, by a transition zone that adapts to changes imposed from behaviors and displacements of the upper and lower shoreface, such as upward profile displacement with sea level rise, aeolian transport, alongshore transport gradient, cross-shore transport. To analyze the influence of shoreface morphology variations on coastal response to mean sea level rise (MSLR), computer simulations were performed using synthetic shoreface profiles with variable shoreface shape parameter (‘m’) values. The random shoreface translation model (RanSTM) was used to simulate coastal response through variations in the shape of shoreface profiles. The ‘m’ value was changed in the upper and lower shoreface separately, to check the sensitivity of coastal response (in this case, shoreline recession distance) as a function of morphological change in each of the two zones. In addition, the variations of ‘m’ were analyzed with a variable and a fixed transition zone length (in order to isolate effects of a variable ‘m’). The simulations indicated that changes in ‘m’ on the upper shoreface have minimal influence on shoreline recession distance, especially when the transition zone remained constant. Conversely, profiles with higher ‘m’ values in the lower shoreface exhibited greater shoreline recession. It was also observed that, a longer transition zone produced a higher shoreline recession. Profiles adjusted with ‘m’ values of 0.66 and 0.4 in both shoreface zones had the highest and lowest shoreline recession distances (141.4 and 203.7 m), respectively. Sensitivity tests have shown that an increase of only 0.02 units in ‘m’ in the lower shoreface had a strong positive correlation (r = 0.97, p

中文翻译：

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量化海岸面形状对海岸对海平面上升响应的影响

摘要 沿海地区是一个非常动态的区域，由于外力的变化，它不断寻求达到平衡状态。沿内陆架的浅带称为岸面，可分为上岸面和下岸面。前者响应跨时间跨度运行的过程，从单个事件（例如风暴）到环境条件的季节性变化，后者的演变发生在地质尺度上，更多地响应环境条件的平均趋势（几十年到千年）。这些带通过沉积交换连接，过渡带适应上、下岸面行为和位移的变化，例如随着海平面上升的向上剖面位移、风沙输送、沿岸运输梯度，跨岸运输。为了分析岸面形态变化对海岸对平均海平面上升 (MSLR) 响应的影响，使用具有可变岸面形状参数 ('m') 值的合成岸面剖面进行计算机模拟。随机岸面平移模型 (RanSTM) 用于通过岸面剖面形状的变化来模拟海岸响应。'm' 值分别在上岸和下岸面发生变化，以检查沿海响应的敏感性（在这种情况下，海岸线退缩距离）作为两个区域中每个区域的形态变化的函数。此外，使用变量和固定过渡区长度来分析“m”的变化（以隔离变量“m”的影响）。模拟表明，上岸面“m”的变化对海岸线后退距离的影响很小，特别是当过渡带保持不变时。相反，在较低的海岸面中具有较高“m”值的剖面表现出更大的海岸线衰退。还观察到，较长的过渡区产生较高的海岸线衰退。在两个岸面区域中用 'm' 值调整为 0.66 和 0.4 的剖面分别具有最高和最低的海岸线后退距离（141.4 和 203.7 m）。敏感性测试表明，下岸面“m”仅增加 0.02 个单位具有很强的正相关（r = 0.97，p 在较低的海岸面中具有较高“m”值的剖面表现出更大的海岸线衰退。还观察到，较长的过渡区产生较高的海岸线衰退。在两个岸面区域中用 'm' 值调整为 0.66 和 0.4 的剖面分别具有最高和最低的海岸线后退距离（141.4 和 203.7 m）。敏感性测试表明，下岸面“m”仅增加 0.02 个单位具有很强的正相关（r = 0.97，p 在较低的海岸面中具有较高“m”值的剖面表现出更大的海岸线衰退。还观察到，较长的过渡区产生较高的海岸线衰退。在两个岸面区域中用 'm' 值调整为 0.66 和 0.4 的剖面分别具有最高和最低的海岸线后退距离（141.4 和 203.7 m）。敏感性测试表明，下岸面“m”仅增加 0.02 个单位具有很强的正相关（r = 0.97，p