Table 3.  Monitoring program in the lower Red River (mainstem) Basin, Texas, 1996–97

M - Monthly
Q - Quarterly
B - Twice a year during summer and/or spring months
Y - Yearly

Standard - streamflow, specific conductance, pH, temperature, Secchi-disk transparency, and dissolved oxygen

Productivity - hourly readings of dissolved oxygen for a 24-hour period to record diurnal swings in dissolved oxygen

Bacteriological - fecal coliform and Escherichia coli

Inorganic constituents - calcium, magnesium, sodium, alkalinity, sulfate, chloride, dissolved solids, and suspended solids

Nutrients - ammonia nitrogen, nitrite plus nitrate nitrogen, and orthophosphorus

Trace elements - (dissolved in water and total in sediments for each) aluminum, arsenic, cadmium, chromium, copper, lead, nickel, selenium, silver, zinc, mercury. Additionally, acid volatile sulfides will be analyzed with each trace element (sediment) sample

Pesticides (sediment) - chlorinated pesticides. Additionally, total organic carbon will be analyzed with each pesticides sample

Refer-
ence
number
(fig. 4)

Station description

 

Station ID

Standard

Produc-
tivity

Bacterio-
logical

Inor-
ganic
constit-
uents

Nutrients

Trace
elements

Pesticides
(sediment)

TNRCC

USGS

1

Red River at U.S. Highway 71

10123

07337000

B

Y

M

Q

B

B

B

2

Red River at U.S. Highway 259

10125

07336820

B

 

 

 

 

B

B

3

Red River at U.S. Highway 271

10126

 

B

Y

 

Q

B

B

B

4

Red River at I35

10132

07316000

B

Y

M

 

B

 

 

5

Red River at U.S. Highway 81

10133

07315500

B

 

M

 

 

B

B

6

Choctaw Creek at Farm Road 1753

10108

 

M

Y

M

Q

Q

B

B

7

Bois D'Arc Creek at Farm Road 100

15318

 

M

Y

M

Q

Q

B

B

8

Pine Creek at Farm Road 2648

10120

 

M

Y

M

Q

Q

B

B

9

Mud Creek at U.S. Highway 259

15319

 

M

Y

M

Q

Q

B

B

10

Big Mineral Creek at Farm Road 901

15320

 

M

Y

M

Q

Q

B

B

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