19. Meanders: 1 . Due to erosion on the outside of a bend and deposition on the inside, the shape of a meander will change over a period of time. 2. Erosion narrows the neck of the land within the meander. In time, and usually during a flood, the river will cut right through the neck. 3. The river will then take the new, shorter route. The fastest current, called the thalweg , will now tend to be in the centre of the river, and so deposition is likely to occur in gentler water next to the banks. 4. Eventually deposition will block off the old Meander to leave an oxbow lake. The oxbow lake will slowly silt up , only refilling after heavy rain or during a flood.
![Fluvial landforms: RIVER PROCESSES: EROSION TRANSPORTATION DEPOSITION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],SALTATION/ TRACTION SUSPENSION/SOLUTION CORRASION/ATTRITION. SOLUTION/ HYDRAULIC ACTION.](https://image.slidesharecdn.com/river-presentation-1227073656094870-8/85/River-Presentation-1-320.jpg)
![Types of flows ,[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)