69-1 



60 



I 



Q 



g 51- 



< 



cj 



42- 



33 



r2 : 0.82 

 CANAL WIDTH : 1.018 CCANAL AGE} + 21.229 



15 



I 



20 



1 1 r 



-I \ 1 1 1 1 1 1 \ 1 \ 1 1 1 1 r 



25 30 35 



CANAL AGE tyrsj 



40 



Figure 3. Relationship between canal width and age in the Humble canal 

 system, Rockefeller Refuge, La. Locations are described in Nichols (1961). 



70 n 



„ 60H 



E 



I 

 I- 

 O 



-I 

 < 



z 

 < 



" 50 



40 



r^- 0.79 

 CANAL WIDTH = 0.704 CCANAL AGE) +41.492 



^-r 



^^ • 



~\ — I — I — I — I — I — I — I — I — I — I — I — I — I — I — I — I — I — I — I — I — I — I — I — I 



4 8 12 16 20 24 28 



CANAL AGE (yrs) 



Figure 4. Relationship between canal width and age in the Deep Lake- 

 Constance Bayou canal system. Rockefeller Refuge, La. 



OU 



