The article presents the postflood period coarse sediment connectivity (CSC) assessment approach on the basis of the holistic ideas of the interpretation of the long‐term CSC in river channels. Seven sets of remote sensing data (1949–2009) were used as the basic information sources to study the CSC along the braided‐wandering Belá River by using the patch‐graph approach for assessing the structural connectivity. The bar areas (patches), with 200 m direct links between them, and the attribute of a deflection angle of a link to the flow direction were parameters used to estimate the integral index of connectivity (IIC) and bar area and bar link importance indices. The higher values of the IIC fit with a well‐developed bar system. Conversely, the values of the IIC decrease because of the progressive degradation of the braided pattern. The potential functional CSC was inferred from the variability of the values obtained by the balance indices representing the balance of the channel–floodplain connectivity (B1) and the bar–bar connectivity (B2). Eight types of the potential functional CSC based on the balance indices and the deduction of processes that conditioned the channel–floodplain and in‐channel CSC linkages were identified. In order to assess the development of the braidplain pattern in terms of the structural connectivity during the study time span, the linear trendline analysis of IIC associated with flood periods was applied. On the basis of the coefficient of determination, all reaches exhibit a decreasing trend in IIC values but different response to flood periods.

中文翻译：

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辫状河沿岸粗沙连通性的多时相评价

本文基于解释河道中长期CSC的整体思路，提出了洪水后粗沙连通性（CSC）评估方法。七套遥感数据（1949-2009年）被用作基本信息源，通过使用斑图方法评估结构连通性，研究了蜿蜒游荡的贝拉河沿岸的CSC。相互之间具有200 m直接链接的条形区域（面片）以及链接点相对于流动方向的偏转角属性是用于估计连通性积分指数（IIC）以及条形区域和条形链接重要性指数的参数。IIC的较高值适合完善的条形图系统。相反，由于编织图案的逐渐退化，IIC的值降低。B 1）和横杠连接（B 2）。根据平衡指数和条件下的八种潜在功能性CSC进行了推导，这些过程限制了通道-洪泛区和通道内CSC的联系。为了在研究时间跨度方面根据结构连通性评估辫状斑纹的发育，应用了与洪水期相关的IIC线性趋势线分析。根据确定系数，所有河段的IIC值均呈下降趋势，但对洪水期的响应不同。