Nearshore Bathymetry(近岸测深)研究综述
Nearshore Bathymetry 近岸测深 - Measuring the nearshore bathymetry is critical in coastal management and morphodynamic studies. [1] The present study aims at understanding the wave transformation effects of RB and the nearshore bathymetry using the phase-averaging spectral wave model simulating waves in the nearshore. [2] Nearshore bathymetry is a basic parameter of the ocean, which is crucial to the research and management of coastal zones. [3] Further studies using this same approach should be done as well as probing into other parameters such as nearshore bathymetry to have a better understanding of beach dynamics as envisaged. [4] Using 532 nm laser pulse, ICESat-2 has been providing other data of Earth System components as well such as vegetation canopy height, land height, and nearshore bathymetry. [5] Employing such an advanced system facilitates highly accurate measurement of changes in the land surface of the Earth, as well as water depths, thereby providing a novel opportunity for nearshore bathymetry. [6] In nearshore bathymetry based on the Ice, Cloud, and Land Elevation Satellite-2 (ICESat-2), water refraction causes a position displacement of the seafloor signal photon, decreasing the bathymetric accuracy. [7] This work demonstrates the viability of using ICESat-2 to help make global, space-borne estimates of nearshore bathymetry in shallow, clear water environments. [8] While the causal factors for these changes are evident in a few cases, for most there are likely a combination of reasons including changes in sand supply by updrift rivers and streams related to dam construction as well as rainfall intensity and duration; lag times between when pulses of sand added to the shoreline from large discharge events actually reach downdrift harbors; variations in wave climate over time; shoreline topography and nearshore bathymetry that determine how much sand can be trapped upcoast of littoral barriers, such as jetties and breakwaters, before it enters a harbor; and timing of dredging. [9] Estimation of wave phase speed and nearshore bathymetry from video imagery. [10] Antecedent wave conditions and changes in incident wave characteristics resulting from interaction with the seabed geology and/or temporal changes in nearshore bathymetry are measured and modelled. [11] According to the results, the order of importance of factors controlling overwash predictability in the study area are: 1st) wave height (more than wave period) can promote overwash 3–4 times more intense than the one recorded during fieldwork; 2nd) nearshore bathymetry, particularly shallow submerged bars, can promote an average decrease of about 30% in overwash; 3rd) grain-size, finer sediment produced an 11% increase in overwash due to reduced infiltration; and 4th) lagoon water level, only negligible differences were evidenced by changes in the lagoon level. [12] We investigate tsunami impacts generated by different slide scenarios and highlight the importance of initial water depth, sliding direction, and nearshore bathymetry. [13] Still, there remain significant data gaps that preclude the determination of the overall contribution of boat waves to shoreline erosion throughout the Bay, notably, shoreline erosion data in low energy waterways, recreational boating traffic patterns, and nearshore bathymetry. [14]测量近岸水深在海岸管理和形态动力学研究中至关重要。 [1] 本研究旨在利用相位平均光谱波模型模拟近岸波浪，了解 RB 和近岸水深测量的波浪转换效应。 [2] 近岸测深是海洋的一项基本参数，对海岸带的研究和管理至关重要。 [3] 应该使用同样的方法进行进一步的研究，并探索其他参数，例如近岸测深，以便更好地了解所设想的海滩动态。 [4] 使用 532 nm 激光脉冲，ICESat-2 一直在提供地球系统组件的其他数据，例如植被冠层高度、陆地高度和近岸水深。 [5] 采用这种先进的系统有助于高度准确地测量地球陆地表面的变化以及水深，从而为近岸测深提供新的机会。 [6] 在基于冰、云和陆地高程卫星 2 (ICESat-2) 的近岸水深测量中，水的折射会导致海底信号光子的位置位移，从而降低测深精度。 [7] 这项工作证明了使用 ICESat-2 帮助在浅水、清澈的水环境中进行近岸水深测量的全球星载估计的可行性。 [8] 虽然这些变化的原因在少数情况下很明显，但大多数情况下可能有多种原因，包括与大坝建设有关的上升河流和溪流的沙子供应变化以及降雨强度和持续时间；从大型排放事件添加到海岸线的沙子脉冲实际上到达下沉港口之间的滞后时间；波浪气候随时间的变化；海岸线地形和近岸水深测量，确定有多少沙子可以在进入港口之前被困在沿岸屏障（如码头和防波堤）的上游；和疏浚时间。 [9] 从视频图像估计波相速度和近岸水深。 [10] 测量和建模由与海底地质相互作用和/或近岸测深的时间变化引起的前波条件和入射波特征的变化。 [11] 根据结果，研究区控制过洗可预测性的因素的重要性排序为： 1）波高（大于波周期）可以促进比实地工作记录的强度高 3-4 倍的过洗； 2) 近岸测深，特别是浅水坝，可以促进平均减少约 30% 的过冲； 3rd) 粒度更细的沉积物由于入渗减少而使过冲量增加了 11%；和 4）泻湖水位，泻湖水位的变化仅证明了微不足道的差异。 [12] 我们调查了不同滑坡情景产生的海啸影响，并强调了初始水深、滑坡方向和近岸水深测量的重要性。 [13] 尽管如此，仍然存在很大的数据差距，无法确定船浪对整个海湾海岸线侵蚀的总体贡献，特别是低能量水道中的海岸线侵蚀数据、休闲划船交通模式和近岸测深。 [14]
nearshore bathymetry change
It is observed that the system can successfully capture the nearshore bathymetry change owing to a typhoon. [1] Influence of nearshore bathymetry changes on the numerical modelling of dune erosion. [2]据观察，该系统可以成功捕捉到台风引起的近岸水深变化。 [1] 近岸水深变化对沙丘侵蚀数值模拟的影响。 [2]