Table 3.72. Summary of natural and cultural features of Sabine Basin. 



A. Hydrology' of the Sabine Basin 



B. Primary production, potential yield and harvest of 

 living resources of Sabine Basin. 



Riverine processes 



Upstream drainage area 



25,000 km^ 



24,000 km^ controlled by Toledo Bend Reser- 



Freshwater flow volume (from upstream) 

 87.8 X 10*m^/yr 



Seasonal: Figure 3-48 



Annual rainfall 140 cm (at Port Arthur) 



Annual rain surplus 43.1 cm/yr 

 Seasonal: Figure 3-48 



Minimum freshwater renewal time: 20 days 



Surface water slope: 0.64 cm/km (fig. 3-49) 



Tides: 



Range: 40 cm at Sabine Pass (monthly mean) 



20 cm at Sydney Island (monthly mean) 

 (fig. 3-49) 



Period: Principally diurnal, with small semi- 

 component (fig. 3-49) 



Water level variation 



Seasonal: At the coast peak in early summer, low 

 in winter 

 Much less variation at Sydney Island 

 (fig. 3-49) 



Long term: Data unavailable 



Salinity 



Seasonal: Figure 3-50 

 Long-term: Data not available 



Control structures and modification 



Toledo Bend Reservoir on Sabine River 

 Salt barrier on Neches River 

 Sabine-Neches ship channel 

 GIWW 



Method explained in part 3.5.2. 



Present harvest attributed to Basin (part 3.2.4). 



Doubtful that Sabine contributes to the offshore 



fishery. 



continued 



131 



