Table 2.  Rainfall, pH, alkalinity, and event-mean concentrations of several forms of nitrogen from sites 1 and 2, Coastal Bend area, south Texas, 199698

[in., inches; mg/L, milligrams per liter; CaCO3, calcium carbonate; --, no data; <, less than laboratory reporting limit]

Date

Rainfall
(in.)

pH
(standard
units)

Alkalinity
(mg/L as
CaCO3)

Nitrogen,
nitrate,
dissolved
(mg/L
as N)

Nitrogen,
nitrite,
dissolved
(mg/L
as N)

Nitrogen,
ammonia,
dissolved
(mg/L
as N)

Nitrogen,
ammonia plus
organic, total
1
(mg/L as N)

Nitrogen,
ammonia
plus organic,
dissolved
1
(mg/L as N)

Nitrogen,
total
(mg/L)
as N

Site 1

06/01/96

0.70

--

--

0.17

<0.01

0.30

0.37

0.31

0.54

06/23/96

1.13

--

--

.14

<.01

.21

.20

.33

.35

06/24/96

.44

--

--

.19

<.01

.39

.42

.39

.61

06/25/96

4.05

--

--

.07

<.01

.07

.07

.09

.14

08/08/96

1.08

5.7

2.8

.15

<.001

.13

<.1

.01

.28

08/09/96

.31

--

--

.22

<.001

.21

.30

.30

.52

08/21/96

1.12

5.4

--

.11

.002

.17

.17

.20

.28

08/24/96

1.21

5.5

--

.07

<.001

.08

.14

.05

.21

09/10/96

.50

--

--

.32

.003

.38

.50

.40

.82

09/20/96

.56

--

--

.21

<.001

.23

.30

.30

.51

11/24/96

.79

--

--

.04

<.001

.16

.20

.20

.24

12/15/96

.68

--

--

.22

<.001

.30

.80

.80

1.0

02/12/97

.21

--

--

.67

<.001

.75

.80

.80

1.5

03/11/97

.41

6.0

2.8

.10

<.01

.18

.30

.20

.40

05/09/97

1.31

--

--

.22

<.001

.23

.16

.19

.44

06/22/97

4.48

--

--

.10

.001

.10

.04

.02

.20

09/21/97

.78

--

--

.17

.005

.17

.29

.20

.46

10/06/97

.25

--

--

.14

<.001

.09

.14

.16

.28

10/11/97

3.43

--

--

.02

<.001

.02

.08

.04

.10

10/18/98

5.27

--

--

.24

.005

.10

.10

.17

.34

Site 2

05/11/96

.47

--

--

.17

<.01

.41

.50

.40

.67

08/09/96

.19

--

--

.22

<.001

.24

.30

.30

.52

08/21/96

.61

6.2

--

.20

.002

.14

.15

.17

.35

08/23/96

.90

--

--

.06

.002

.20

.40

.16

.46

09/20/96

1.63

--

--

.07

<.001

.20

.20

.30

.27

11/24/96

.28

--

--

.11

<.001

.32

.50

.50

.61

12/15/96

.31

--

--

.14

<.001

.30

.40

.30

.54

03/11/97

.65

7.8

9.2

.10

.01

.14

.30

.30

.40

04/02/97

1.73

--

--

.03

<.001

.06

<.1

.01

.09

04/03/97

3.51

--

--

.03

<.001

.09

.01

.01

.12

05/09/97

1.03

4.9

--

.17

<.001

.18

.14

.13

.35

05/16/97

2.02

--

--

.12

.002

.15

.08

.08

.27

08/23/97

.40

--

--

.45

.01

.09

.45

.21

.90

09/22/97

2.74

--

--

.06

.002

.11

.13

.10

.19

09/24/97

1.96

--

--

.10

.001

.28

.28

.26

.38

10/11/97

5.52

--

--

.04

<.001

.01

.14

.12

.18

02/14/98

1.54

--

--

.14

.002

.30

.38

.34

.52

09/23/98

1.50

5.2

--

.07

.001

.05

.09

.01

.16

10/18/98

2.21

6.0

--

.06

.001

.05

.09

.04

.15

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