The Entropic Braiding Index ( eBI ): A Robust Metric to Account for the Diversity of Channel Scales in Multi‐Thread Rivers
The Entropic Braiding Index ( eBI ): A Robust Metric to Account for the Diversity of Channel Scales in Multi‐Thread Rivers
复制标题
熵编织指数 ( eBI )：解释多线河流河道规模多样性的稳健指标
DOI：
10.1029/2022gl099681
复制
发表时间：
2022
影响因子：
5.2
通讯作者：
Foufoula‐Georgiou, Efi
中科院分区：
文献类型：
--
作者：
Tejedor, Alejandro;Schwenk, Jon;Kleinhans, Maarten;Limaye, Ajay B.;Vulis, Lawrence;Carling, Paul;Kantz, Holger;Foufoula‐Georgiou, Efi
编织指数（BI），定义为每个横截面拦截通道的平均计数，是表征多线程河流系统的广泛使用的指标。然而，它没有考虑信道的多样性（例如，就排水量而言），省略了与系统复杂性相关的重要信息。在这里，我们提出了BI的一种修改，熵编织指数（eBI），它通过使用香农熵来编码每个横截面中通道的多样性来增加BI中的信息内容。eBI被解释为每个横截面的“有效通道”数量，允许与传统BI进行直接比较。我们证明了比率BI/eBI量化河道差异的潜力，区分多线程系统的类型（编织与编织），并评估流量变化（如季节性洪水）对河流横截面稳定性的影响。
The Braiding Index (BI), defined as the average count of intercepted channels per cross‐section, is a widely used metric for characterizing multi‐thread river systems. However, it does not account for the diversity of channels (e.g., in terms of water discharge) within different cross‐sections, omitting important information related to system complexity. Here we present a modification ofBI,the Entropic Braiding Index (eBI), which augments the information content inBIby using Shannon Entropy to encode the diversity of channels in each cross section.eBIis interpreted as the number of “effective channels” per cross‐section, allowing a direct comparison with the traditionalBI. We demonstrate the potential of the ratioBI/eBIto quantify channel disparity, differentiate types of multi‐thread systems (braided vs. anastomosed), and assess the effect of discharge variability, such as seasonal flooding, on river cross‐section stability.