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中文摘要：
在人类活动日益频繁及海平面上升等自然环境变化的背景下,研究和预测海岸系统地貌演变正变得越来越重要。长周期数值模型是海岸系统演变研究的一种重要手段,近年来得到了迅速发展和广泛应用。介绍了海岸系统演变的长周期数值模型的计算原理、信息约减和地貌加速等关键技术、时空尺度及其验证方法。详细阐述了不同类型长周期模型在海岸系统演变的过程与机制和长期演变的数值模拟及预测人类活动和自然变化引起的海岸系统长期演变等方面的应用与最新进展,并对长周期模型的发展进行了讨论。
英文摘要：
Long-term model of coastal morphological evolutions has been developed quickly in the last several decades,with the increasing awareness that human interference and natural changes like sea level rise can have long-term effects on the coastal system.This paper introduces the frame,spatial and temporal scales,concerned techniques such as input information reduction and morphological acceleration factor and methods for model validation of long-term morphodynamic models.The applications of such models include understanding processes and mechanisms of coastal evolutions using idealized and complex models and the prediction of long-term evolution of coastal systems under human activities and natural changes like sea level rise.With the development of computer capacity and the increasing understanding of coastal processes,complex models have been used increasingly in coastal environment.Based on the analysis of recent advances in long-term morphodynamic modeling,the prospect of future research is put forward.
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