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20 



to 



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O 



8 15 



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 < 



LlI 



2 



10 



t — i — i — i — i — i — i — i — i — i — i — i — r 



MISSISSIPPI 



OTHERS 



J L 





M 



J L 



M 



i *"l— • W M'M**¥»"f«"l""i 



N 



MONTHS 



Figure 6. Monthly mean river discharge from 

 the Atchafalaya and Mississippi Rivers and 

 the sum of the mean outflows of the rivers west 

 of the Atchafalaya to the Rio Grande (Source: 



le Atcnaraiaya to tne ruu laranue \juui 

 U.S. Geological Survey Reports of surface 

 supplies of the United States 1950-1970) 



water 



13 



