CONTENTS 



TABLES — Continued 



Page 



13 Tidal prisms through Sabine Pass, 18-23 July 1962 85 



14 Tidal prisms at Sabine Lake and Port Arthur Canal entrances 89 



FIGURES 



1 Longshore current and sediment transport rates, based on visual 



observations 11 



2 Long-term monthly mean tidal range variability 13 



3 Long-term monthly mean water level variability 14 



4 Upper Texas coast monthly mean tide level variability, 1974 16 



5 Upper Texas coast monthly mean tidal range variability, 1974 17 



6 Historical variation in mean water level 17 



7 Historical variation in mean diurnal tidal range 18 



8 Variation of annual mean water level, Galveston Channel, Texas 18 



9 Variation of annual mean tidal range, Galveston Channel, Texas 18 



10 Freeport Harbor entrance, Texas 19 



11 Freeport entrance charts 21 



12 Depth changes, Freeport Harbor, Texas, 1966-75 22 



13 Depth changes, Freeport Harbor, Texas, 1970-75 22 



14 Positions of 12-, 20-, and 29-foot contours in 1966, 1970, and 1975, 



Freeport entrance, Texas 23 



15 Nearshore changes, Freeport Harbor 24 



16 Shoaling rates at Freeport entrance, Texas 29 



17 Cumulative dredged volumes, Freeport, Texas, 1910-75 29 



18 San Luis Pass, 1853 30 



19 San Luis Pass, 1867 30 



20 San Luis Pass, 1933 31 



21 San Luis Pass historical variation in inlet width, area, and 



hydraulic radius 32 



22 Minimum-width cross-sectional profiles, San Luis Pass, Texas 32 



23 San Luis Pass, 1938 33 



24 San Luis Pass, 1952 33 



25 San Luis Pass, 1954 35 



26 San Luis Pass, 1957 35 



27 San Luis Pass, 1961 35 



28 San Luis Pass, 1962 36 



