Table 3.  Maximum discharges and velocities during flood and ebb tides and net discharge volumes at lower Laguna Madre discharge measurement sites, June 1921, 1997

[n/a, not available]

Site

number

Site name

Flood tide

 

Ebb tide

Net
discharge
volume
(acre-feet)

Maximum
discharge
(cubic feet
per second)

Maximum
velocity
(feet per
second)

Maximum
discharge
(cubic feet
per second)

Maximum
velocity
(feet per
second)

1

Laguna Madre at Brazos Santiago Pass

138,000

12.72

 

-88,100

1-1.73

59,300

2

South Bay Pass

5,970

1.24

 

-6,070

-1.17

2,190

3

Brownsville Ship Channel

234,700

n/a

 

2-17,500

n/a

27,000

4

Port Isabel Channel

15,000

1.15

 

-13,100

-.51

8,880

5

Laguna Madre at Queen Isabella Causeway

97,300

2.72

 

-64,500

-1.73

34,500

1 Velocity data from site 5.

2 Computed as the discharge at site 1 minus the sum of discharges at sites 2 and 5.

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