b. The total (Mississippi plus 

 Atchafalaya) average annual suspended 

 sediment loads delivered to south 

 Louisiana have decreased about 50 

 percent since the early 1950's. 



flood control and navigation. 

 U.S. Army Corps of Engineers, 

 Mississippi River Commission, 

 Vicksburg, Mississippi; 1932: 3 



Vol. 



c. The average annual volume of 

 water transported by the Mississippi 

 below the latitude of Red River Land- 

 ing has decreased due to increased 

 diversions to the Atchafalaya River 

 since the middle 1800' s. 



d. Developments in the Atcha- 

 falaya Basin, following actions of 

 the State of Louisiana to establish 

 navigation on the Atchafalaya River 

 in the middle 1800' s, have signifi- 

 cantly hastened the natural enlarge- 

 ment processes in the Atchafalaya 

 Basin and Atchafalaya Bay. 



Fisk, H.N. Geological investigation 

 of the Atchafalaya Basin and the 

 problem of the Mississippi River 

 diversion. U.S. Army Corps of 

 Engineers, Mississippi River 

 Commission, Vicksburg, Missis- 

 sippi; April 1952: 2 Vol. 



Latimer, R.A.; Schweizer, C.W. The 

 Atchafalaya River study. U.S. 

 Army Corps of Engineers, Miss- 

 issippi River Commission, Vicks- 

 burg, Mississippi; May 1951: 3 

 Vol. 



e. Channel enlargements in the 

 middle and lower reaches of the 

 Atchafalaya Basin have been instru- 

 mental in channeling sediments to the 

 Atchafalaya Bay, reducing the poten- 

 tial for overbank sedimentation in 

 the Atchafalaya Basin above Morgan 

 City, and causing acceleration of a 

 significant marsh area in Atchafalaya 

 Bay. 



LITERATURE CITED 



Paper H, Sediment investigations on 

 the Mississippi River and its 

 tributaries prior to 1930. War 

 Department, U.S. Army Corps of 

 Engineers, Mississippi River 

 Commission, St. Louis, Missouri; 

 1930. 



Roberts, H.H.; Adams, R.D.; Cunning- 

 ham, R.H.W., Evolution of sand- 

 dominant subaerial phase, Atcha- 

 falaya Delta, Louisiana. Am. 

 Assoc, of Petroleum Geologists 

 Bull. 64:2; Feb. 1980. 



Elliott, D. C. The improvement of 

 the Lower Mississippi River for 



Shen, H.W. River mechanics. 1971, 2 

 Vol. 



348 



