Where the flow is more continuous, as with spring snow melt, incised-channel flow in channels high takes place in a true network of braided streams. Such stream-flow-dominated alluvial fans tend to have a shallower slope but can become enormous, and include the Kosi and other fans along the Himalaya mountain front in the Indo-Gangetic plain. Here, continued movement on the Main Boundary Thrust over the last ten million years has focused the drainage of of mountain frontage into just three enormous fans.