Controls of the Topological Connectivity on the Structural and Functional Complexity of River Networks
Controls of the Topological Connectivity on the Structural and Functional Complexity of River Networks
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DOI：
10.1029/2020gl087737
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发表时间：
2020-11
影响因子：
5.2
通讯作者：
Sevil Ranjbar;Arvind Singh;Dingbao Wang
中科院分区：
文献类型：
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作者：
Sevil Ranjbar;Arvind Singh;Dingbao Wang
流域是包含渠道网络的复杂系统，渠道网络与山坡相互作用，并且是运输水，沉积物和营养的途径。熵的方法是使用频道网络的两个不同表示，我们使用宽度函数进行了宽度函数，这是通道的空间排列的特征。结构复杂性，表明表面不通道（山坡）对运输过程中异质性的增加贡献。
Catchments are complex systems containing channel networks and hillslopes. Channel networks interact with hillslopes and are pathways for transporting water, sediment, and nutrients. Understanding the branching and flux transport patterns of channel networks is critical for predicting the response of catchments to external forcing such as climate and tectonics. However, factors creating complexities in catchments are not fully understood. Here, we propose a new framework based on multiscale entropy approach to evaluate complexity of catchments using two different representations of channel networks. First, we investigate the structural complexity using the width‐function, which characterizes the spatial arrangement of channels. Second, we utilize the incremental area‐function along the main channel to study the functional complexity that captures the patterns of transport of fluxes. Our analysis reveals stronger controls of topological connectivity on the functional complexity than on structural complexity, indicating unchannelized surface (hillslope) contribution to the increase of heterogeneity in transport processes.