What is it about?
Highlights • Existing channel braiding indices considered primarily one-dimensional nature of the channel and bar. • Four novel indices were proposed considering the linear and areal dimensions of the channel and bar. • Proposed indices focus on the unit-free measures with known limits enabling pragmatic comparison with self and other channels. • New methods were tested using field data implying a significant correlation with the existing methods.
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Why is it important?
The existing methods of quantifying Braiding Intensity are primarily concerned with the linear or 1D nature of the channel and bar. The present study introduced the areal or 2-D nature of the channel and bar to capture a more realistic picture because, with same length, area of the bar may differ greatly. Therefore, we proposed four indices on channel braiding taking into consideration the area of the channel and bar.
Perspectives
The empirical examination of a complex channel planform, particularly the dynamics of a multi-thread river, involves a thorough analysis of three major dimensions: bar growth, channel length, and channel count. Various indices have been devised to address the intricate channel response within the context of sediment-energy synergistic scenarios. The prevailing methods primarily focus on the linear or 1D nature of the channel and bar. In contrast, this study introduces the areal or 2-D nature of the channel and bar to provide a more realistic representation, acknowledging that, with the same length, the area of the bar may vary significantly. Hence, four indices related to channel braiding, incorporating the area of the channel and bar, are proposed. These indices were tested on the 28 reaches of the Damodar River in India, revealing a substantial correlation (approximately 80%) with the existing standard method.
Dr Balai Chandra Das
Dept. of Geography, Krishnagar Govt, College, Nadia-741101
Read the Original
This page is a summary of: Reviewing braiding indices of the river channel in an attempt to establish alternatives, MethodsX, January 2023, Elsevier,
DOI: 10.1016/j.mex.2023.102042.
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