21. These include river channel , crevasse splay, overbank, and marsh environments. 22. They spawn in strong current main stem river channels over stone or gravel substrates. 23. The field extends up to 17m into the river channel . 24. Meander scars are caused by the varying velocities of current within the river channel . 25. Approximately of new river channel was constructed to route the river into the aqueduct. 26. The Pine River channel was dredged in 1869, connecting Lake Michigan to Lake Charlevoix. 27. Both the river channels and the lakes and ponds in the moor are man-made. 28. As the slope of the river channel decreases, it becomes unstable for two reasons. 29. Its collapse was the result of pier scour and movement of the river channel . 30. Floodplains may be very wide in relation to the size of the river channel .
