Spontaneous tidal network formation within a constructed salt marsh: Observations and morphodynamic modelling
Spontaneous tidal network formation within a constructed salt marsh: Observations and morphodynamic modelling
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DOI：
10.1016/j.geomorph.2007.04.013
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发表时间：
2007-11-01
期刊：
影响因子：
3.9
通讯作者：
Rinaldo, Andrea
中科院分区：
文献类型：
--
作者：
D'Alpaos, Andrea;Lanzoni, Stefano;Rinaldo, Andrea
我们通过遥感和辅助实地调查，监测和分析了威尼斯泻湖一个新建立的人工盐沼内的潮汐网络的快速(0(L)年)发展。在盐沼建设后，志愿者小溪网络远离一条人工修建的主河道(平均和最大年迎头增长率分别为11米/年和18米/年)。潮汐小溪系统的快速形成为检验作者先前提出的潮汐网络启动和发育模型的可靠性提供了独特的机会。恢复后的沼泽呈现出类似于大型野外实验室的受控环境的特征，因为它允许在忽略观测时间尺度上的沉积和沉积过程的合理假设下，比较真实网络结构和模拟网络结构的形态特征。我们的结果与观测证据相比较是有利的，表明该模型被证明能够合理地再现实际通道网络模式的主要特征。该模型再现了生态地貌和水动力相关性的统计网络特征，并捕捉了网络切割过程的主要模式。(C)2007 Elsevier B.V.保留所有权利。
We have monitored and analyzed, through remote sensing and ancillary field surveys, the rapid (0(l) year) development of a tidal network within a newly established artificial salt marsh in the Venice Lagoon. After the construction of the salt marsh, a network of volunteer creeks established themselves away from an artificially constructed main channel (with mean and maximum annual headward-growth rates of 11 m/yr and 18 m/yr, respectively). The rapid formation of this system of tidal creeks provides a unique opportunity to test the reliability of a model of tidal network initiation and development, previously proposed by the authors. The restored marsh presents the characteristics of a controlled environment analogous to a large-scale field laboratory, as it allows comparison of the morphologic features of real and simulated network structures under the reasonable assumption of neglecting accretion and deposition processes over the timescales of observation. Our results compare favorably with observational evidence, showing that the model proves reasonably capable of reproducing the main features of the actual channel-network patterns. The model reproduces statistical network characteristics of eco-morphodynamic and hydrodynamic relevance and captures the dominant modes of the network-incision process. (C) 2007 Elsevier B.V. All rights reserved.