322 



happ. STREAM-CHANNEL CONTROL 



[Ch. 18 



Meander loops develop to a fairly uniform maximum size on any one 

 stream or part of a stream where conditions are similar. The con- 



LEGEND 



moooexx Bank Revetment 



: Pile Dike 



• Pile Dike W/Terminal 



o Rock fill Dam 



C23?5_ Willows 



CC~3- Timber 



tEvC* Sand 



Fig. 1. Comparative maps of a section of Missouri River near Arrow Rock, 

 Missouri, in 1890 and 1945, showing migration of bends, an abortive cutoff of 

 1915, and changes in land use and river pattern resulting from channel-stabiliza- 

 tion works. 



trolling factors limiting meander size are not fully known, but larger 

 streams have larger meanders, and laboratory experiments with uni- 

 form rates of flow and homogeneous bank materials indicate that 

 steeper axial slopes also produce larger meanders (Friedkin, 1945). 



