Meandering rivers trend in the direction of increasing sinuosity. Rivers are commonly described and interpreted by their sinuosity. Mike Mayall provides the best summary that discusses the causes of sinuosity. Braided channels are characterized by multiple, active streams within a broad, low sinuosity channel. Meandering rivers a sinuosity value/ratio of greater than 1.5. Sinuosity Index has a non-mathematical utility as well. The sinuosity index plays a part in mathematical descriptions of streams. Rivers form meanders as they flow laterally downstream, see sinuosity. Sinuosity in submarine channels is a feature regularly observed on seismic maps. The sinuosity value is really significant when the line is continuously differentiable (no angular point).