Braided river

Overview

A sedimentary system composed of a series of sedimentary facies of braided rivers which are observed at upstream and downstream rivers. Braided rivers are composed of multiple shallow channels. Channels change its position frequently, and the islands between channels are unstable and move. Braided rivers are on the alluvial fan and delta. Braided rivers are formed at the depositon-dominant places where as meandering rivers are at the transportation-dominant places. For example, places where river flow rate is frequently changed, places where river width is widened and river depth becomes shallow, and places where gravels and sands are dominant.

Mainly composed of rounded gravel beds. Sedimentary facies does not change from the upstream to the downstream. Distributes along the axis of incised valleys.