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Seabed dynamics in a coastal embayment

机译:沿海跃迁的海底动态

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This study focuses on the morphological history of the seabed adjacent to the St. Ives to Padstow Bay coastlines, southwest England. 1931 and 2008 bathymetric charts covering the North Cornwall coast were examined using bathymetric change maps and transects. The results here showed that the seabed topography in this region is not static, with patterns of net sediment movement varying spatially across the seabed. Rates of erosion and deposition varied because of the seabed exposure to the diverse rates of higher waves and tidal actions. The variation relates to the relative depths at which waves feel the seabed. Waves are more sensitive at nearshore bathymetry depths less than 20m (and 3.5km offshore) than at offshore. However, the amount of energy and increasing wave height reaching the coastlines have a minor impact on sediment transport rates or morphological modification of the adjacent coastlines and estuaries but allow the erosion potentials.
机译:本研究侧重于毗邻圣艾夫斯海底的形态史,以帕德斯托湾海岸线,西南英格兰。 1931年和2008年覆盖北康沃尔河海岸的巴西浴室图表使用碱化的变化图和横断面进行了检查。 这里的结果表明,该地区的海底地形不是静态的,净沉积物运动模式在海底上空间变化。 由于海底暴露于较高波浪和潮汐动作的多种速率,因此侵蚀和沉积率变化。 变化涉及波浪感受到海底的相对深度。 波浪在近岸沐浴般的深度比海上近20米(和3.5km)更敏感。 然而,到达海岸线的能量和增加波浪高度对沉积物运输速率或相邻海岸线和河口的形态学改造具有轻微影响,而是允许侵蚀潜力。

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