Dynamics of salt marsh margins are related to their three-dimensional functional form
Dynamics of salt marsh margins are related to their three-dimensional functional form
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DOI：
10.1002/esp.4614
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发表时间：
2019-07-01
影响因子：
3.3
通讯作者：
Smith, Geoff
中科院分区：
文献类型：
--
作者：
Evans, Ben R.;Moller, Iris;Smith, Geoff
潮间环境中沉积地貌的三维结构是区域水动力的主要控制因素。它调节潮流和波浪对地形本身以及海堤或海岸防御等工程基础设施施加的力的位置和大小。此外，这种影响是反射性的，地貌代表了对施加在其上的力量的综合、长期反应。在海岸带的形态和过程（形态动力学）之间存在着很强的相互联系，而在潮间带的粘性、植被沉积物的情况下，这种联系明显滞后，而且人们对这种联系知之甚少。提出了一种方法，将潮坪-盐沼界面的几何特性与该界面的历史和潜在的未来演变联系起来。一种新的定量分类方案，能够分离沼泽边缘的功能形式的基础上开发和应用，以证明存在的关系，地貌形态和形态演变之间的区域范围。这提供了证据的空间变量之间的平衡自组织和外部控制的形态动力学的演变和第一个定量的基础上可能的未来动态的快速评估程序。(c)2019约翰威利父子有限公司
The three-dimensional configuration of sedimentary landforms in intertidal environments represents a major control on regional hydrodynamics. It modulates the location and magnitude of forces exerted by tidal currents and waves on the landform itself and on engineered infrastructure such as sea walls or coastal defences. Furthermore, the effect is reflexive, with the landforms representing an integrated, long-term response to the forces exerted on them. There is a strong reciprocal linkage between form and process (morphodynamics) in the coastal zone which is significantly lagged and poorly understood in the case of cohesive, vegetated sediments in the intertidal zone. A method is presented that links the geometric properties of the tidal flat-salt marsh interface to the history and potential future evolution of that interface. A novel quantitative classification scheme that is capable of separating marsh margins based on their functional form is developed and is applied to demonstrate that relationships exist between landform configuration and morphological evolution across a regional extent. This provides evidence of a spatially variable balance between self-organized and external controls on morphodynamic evolution and the first quantitative basis for a quick assessment procedure for likely future dynamism. (c) 2019 John Wiley & Sons, Ltd.