Frequent non-storm washover of barrier islands, Pacific coast of Colombia
Frequent non-storm washover of barrier islands, Pacific coast of Colombia
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发表时间：
2000-01
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通讯作者：
R. Morton;Juan L. González;G. López;I. Correa
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作者：
R. Morton;Juan L. González;G. López;I. Correa
哥伦比亚太平洋沿岸的屏障岛屿反复经历严重的冲刷，即使在东太平洋的破波很低，岸上的风很平静。在El Choncho屏障岛，最近发生的非风暴冲刷事件破坏了一个新的入口，导致海滩迅速后退，摧毁了一个海岸线保护结构，并经常淹没一个土著人小村庄，不得不搬迁。与地震引起的沉降或长期海滩退缩相关的陆地高程降低可能会增加屏障冲刷，但从时间上讲，它与厄尔尼诺造成的海平面区域性上升20至30厘米最密切相关。一个宁静的热带岛屿同时受到敌对的湍流冲刷的干扰，这一矛盾在目前可能是独一无二的，但它表明，如果全球变暖导致海平面迅速上升，世界各地的沿海平原将受到怎样的影响。
Barrier islands of the Pacific coast of Colombia repeatedly experience severe washover even when breaking waves in the eastern Pacific are low and onshore winds are calm. On the barrier island of El Choncho, recent non-storm washover events have breached a new inlet, caused rapid beach retreat, destroyed a shoreline protection structure, and flooded a small village of indigenous people so frequently that it had to be relocated. Barrier washover may be augmented by lowered land elevations associated with earthquake-induced subsidence or long-term beach retreat, but temporally it is most closely associated with a 20 to 30 cm regional increase in sea level caused by El Nino. The contradiction of a tranquil tropical island scene simultaneously disturbed by hostile turbulent washover may be unique at present, but it exemplifies how coastal plains throughout the world would be affected if sea level were to rise rapidly as a result of global warming.