SN

pH

EC
(µScm-1)

TDS (ppm)

TSS (ppm)

NO3-N (µgL-1)

NH4-N (µgL-1)

PO4-P (µgL-1)

DIN    (µgL-1)

DIP  (µgL-1)

DIN/DIP

Upstream Catchment

 

 

 

 

 

 

 

 

1

5.4

36.7

18.2

40

940

360

120

1300

120

10.83

2

6.9

38.6

18.8

30

940

370

200

1310

200

6.55

3

7.6

30

15.1

30

970

260

160

1230

160

7.68

4

6.5

37.9

19

40

950

320

190

1270

190

6.68

5

8.3

39.8

19.9

20

950

170

140

1120

140

8.0

6

7.8

38.8

19.7

20

940

260

180

1200

180

6.67

Average

7.08

36.97

18.45

30.00

948.33

290.00

165.00

1238.33

165.00

7.74

Std Dev.

1.05

3.56

1.75

8.94

11.69

75.37

30.82

71.39

30.82

1.63

Middle Stream Catchment

 

 

 

 

 

 

 

7

8.2

70.5

35.3

70

770

240

230

1070

230

3.39

8

8.1

40.2

20.1

20

940

310

170

1250

170

7.35

9

8.2

41.3

20.8

20

880

260

140

1140

140

8.14

10

8.4

46.4

23.1

10

970

320

230

1290

230

5.61

11

8

133.2

67

60

950

280

230

1230

230

5.35

12

8.4

54.5

27.3

20

940

240

180

1180

180

6.56

13

8.1

37.7

23.8

30

940

220

180

1160

180

6.44

14

8.5

49.5

24.6

20

950

230

150

1180

150

7.87

Average

8.2

59.2

30.3

31.3

917.5

262.5

188.8

1187.5

188.8

6.3

Std Dev.

0.2

31.7

15.6

21.7

65.0

37.3

36.8

68.8

36.8

1.6

Downstream Catchment

 

 

 

 

 

 

 

 

15

8.1

52.7

26.4

20

970

350

230

1320

230

5.74

16

8

52.9

26.3

20

950

270

270

1220

270

4.52

17

8.1

52.3

26.2

30 

940

320

250

1260

250

5.04

Average

8.1

52.6

26.3

20.0

953.3

313.3

250.0

1266.7

250.0

5.1

Std Dev.

0.1

0.2

0.1

0.0

12.5

33.0

16.3

41.1

16.3

0.5

Table 1: Physico-chemical content along the Sondu-miriu River.