Table 26. Recommendations to minimize the impact of canals. 



Recommendation 



References 



Minimize new canal construction 

 by required multiple use of exist- 

 ing canals and common use of pipe- 

 line canals. 



Craig and Day (1981) 



Restrict new canals to natural 

 corridors, levees, or defined 

 development corridors. 



No construction of canals 

 which connect (a) fresh and 

 saline areas, and (b) the edge and 

 center of hydrologic basins. 



Gagliano (1973) 



Craig and Day (1981) ; 

 Gosselink et al. (1979) 



No construction of blind-end canals 

 or fingerfill developments. 



Canal depths should not exceed 

 that of the euphotic zone 

 (1.8-2.0 m at mean low water) 

 except where normal turbidity 

 results in shallow euphotic zone. 



Canal depths should never exceed 

 the depth of the water body where 

 the canal terminates. 



Craig and Day (1981) 



Craig and Day (1981) 



Craig and Day (1981) 



Canals should be of uniform depth 

 or become gradually shallower 

 proceeding inland from a central 

 water body to insure adequate 

 flushing. This prevents formation 

 of stagnant pockets of water. 



Alignment of canals should take ad- 

 vantage of existing natural channels 

 or existing" art if icial channels. 



Craig and Day (1981) 



Craig and Day (1981); 

 Longley et al. (1978) 



Limit canals between vegetative types. Stone and McHugh (1979) 



Perform dredging operations as 

 quickly as possible. 



Dispose of spoil with special 

 care; place in nonwetland 

 areas or use in marsh creation. 



Gosselink et al. (1979); 

 Darnell (1977) 



Craig and Day (1981); 

 Lindall et al. (1979) 



Place periodic opening in exist- 

 ing spoil banks to prevent im- 

 pediment of water circulation. 



(continued) 



Craig and Day (1981); 

 Longley et al. (1978); 

 Lindall et al. (1979) 



165 



