An anabranch is a section of a river or stream that diverts from the main channel and rejoins it downstream. Anabranches are common in river systems with low gradients and are often associated with braided rivers. The formation and evolution of anabranches are important for understanding river dynamics, sediment transport, and floodplain development.
Reference: Brierley, G. J., & Fryirs, K. A. (2005). Geomorphology and River Management: Applications of the River Styles Framework. Blackwell Publishing.