Table 2. Weir discharge calculations for weir 

 crest at MTL. 



Time, t/T 

 (fraction of 

 tidal cycle) 



h ( 



Dcean) 1 

 (ft) 



h (channel) 2 

 (ft) 



q 



(ft 3 /s-ft) 



0.25 











< 







0.30 





0.70 





0.40 



1.58 



0.35 



hj , 



1.45 



M 



1.20 



3.29 



0.40 





2.00 





1.80 



4.16 



0.45 





2.35 





U.30 



2.51 



0.50 





2.50 





2.60 



-3.90 



0.55 



K 



2.45 



h l 



2.55 



-3.85 



0.60 





2.10 





2.10 







Obtained from tidal curve for oceanside of weir 

 in Figure 11. 



2 0btained from tidal curve for channel side of 

 weir in Figure 11. 



3.0 



2.5 



2.0 



1.5 



1.0 



0.5 







■0.5 



• 1.0 



■ 1.5 



•2.0 



2.5) 



3.0 



3.5 



1 1 1 1 1 1 

 Ocean Tide -^- i *— -^. 



\ y? ^\ 



\ y* > 



*\ A* \ 



y? \ 





— r~ 



1 



- 



Phase Lag 0.0225-*- 





r/A \ 



// Channel Tide \ 











_ 











— 



- 





// 









- 



Weir Elevation 



/ 



/ 



6 



Weir 



Elevation 





/< 

 // 



'/ 

 / 



V f ,ood = 25,800 ftVft 







/<& y^^\ ^"ood = 2.57ft 3 /s-ft _ 



4 









- / y" x 



2l 



o£ 







- 



^^y ^ebb = 15,800 ft 3 /ft— »l-__^ / 









i^ \ fi\ 



-2 







— 



"^"flood/^ebb = ' .63 V~o-"° \ 



-4 







_ 



q ebb = 2.83 ft 3 /s-ft 





1 



1 





0.2 



0.3 0.4 0.5 0.6 0.7 



Time (fraction of tidal cycle ), t/T 



0.8 



0.9 



Figure 15. Discharge over weir as a function of time during a tidal 

 cycle (weir 1.5 feet below MTL). 



30 



