River pattern discriminant method based on resistance parameter and activity indicators

Long-term evolution of meandering channel planforms in response to the mean annual flow and width–depth ratio

“…Natural rivers are mainly categorized into three patterns: stable single-thread channel, quasi-stable anabranching channel, and unstable braided channel based on river activity and resistance characteristics (Eaton et al, 2010;Song and Bai, 2015;Xin et al, 2018). When the width-depth ratio is at some super-critical value states (e.g., exceeding 50 (Bridge, 1993)), the meandering pattern is commonly prone to degenerate into multithread pattern with the increase of internal instability (Eaton et al, 2010;Song et al, 2016) and the response uncertainty of river system to flow will enlarge continuously (Song et al, 2019;Song et al, 2020) during the evolution process.…”

Energy dissipation caused by boundary resistance in a typical reach of the lower Yellow River and the implications for riverbed stability

“…Bai et al (2015) proposed a statistical analysis of the flow resistance induced by river morphology to study sediment movement in rivers. Based on the analysis, the discrimination and activity indicators of river patterns can be expressed by formulas (Xin et al, 2018). Therefore, it is necessary to quantitatively establish the relationship between river energy dissipation and river patterns, as well as riverbed stability.…”