1973 Meon Ll>tl, ft obo>t NSL 



( Mor. - Aug. ) 



Port Arthur 1.23 



Nortli Sal)in< Loiit 1.47 



Sobint PotI I.2S 



Port Arthur ( Ptb. to Nov. Including Stpt., * 1.23 ft ) 

 North Sobint Lolii (Jon. to Oac, + 1.46 M ) 

 Sobinf Posa, NOS (Mor. to Aug. I 



Jon. Fib. Nor. Apr. Moy Juni July Aug. Sipt. Oct. No«. Oic. 



Figure 76. Sabine Lake monthly mean tide 

 level variability, 1973. 



Table 11. 



Tidal lags in Sabine Pass system, 

 23 July-5 August 1962. 



Location 



Tidal lag 1 



High water 

 (hr) 



Low water 

 (hr) 



Sabine jetty 

 Sabine Pass 

 Port Arthur 



0.0 



0.11 



3.5 



0.0 



0.05 

 2.7 



taken at three depths (surface, middepth, and bottom) at each station; the 

 stations were located near the center of the channel. Winds during the survey 

 period were less than 10 miles per hour and variable in direction. Freshwater 

 discharges from the Sabine and Neches Rivers were about 2,300 cubic feet per 

 second, well below the 1961-65 average of 14,650 cubic feet per second. A 

 plot of the surface currents is shown in Figure 77. 



(2) Tidal Discharges and Prisms. Discharges through each range (see 

 Fig. 73 for locations) were computed as follows: Cross-sectional profiles for 

 NOS ranges 2, 3, and 4 were obtained from NOS chart 517 dated 12 February 

 1968, and for range 1 from dredging surveys made in 1962. For each ebb or 

 flood phase, the areas under the velocity-time curves were planimetered. 

 Because of the crudeness of the cross-sectional profiles at ranges 3 and 4, 

 the discharge through each range was taken to be the product of the total 

 cross-sectional area and the average of the three integrated areas under the 

 velocity curve. At range 1, however, the current meter positions were plotted 

 on each profile, and horizontal lines were drawn across the profile midway 

 between the meter positions. The area within each of the three sections was 



83 



