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USDI 1970 Report

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    USDI 1970 Report Tables

TABLE 1

Mineral Quality of Major Surface Inflows to Salton Sea
Constituent, mg/l
Whitewater River
New River
Alamo River
Ca

170.3

229.1

198.8

Mg

44.3

113.3

114.8

Na

558.2

823.1

539.4

K

13.7

26.2

12.1

CO3

0.3

0.0

0.0

HCO3

332.6

266.0

227.0

SO4

867.5

789.2

830.0

Cl

453.8

1213

731.0

NO3*

27.8

19.8

26.6

 PO4**

0.8

0.9

0.6

F

3.3

0.8

0.8

B

1.0

1.2

0.6

SIO2

21.8

17.1

13.0

TDS

2495.4

3499.7

2696.1

Data from California Department of Water qResources 1963-67

* Includes FWQA data
** FWQA data only

TABLE 2

Mineral Quality of Major Surface Inflows to Salton Sea

Subsurface Inflow
Area

Volume of Water
(Acre ft) per yr.

Total Dissolved
Solids (mg/l)

Tons Per
Year

Coachella Valley

30000

800

33000

San Felipe Valley

10000

1200

16000

Imperial Valley

2000

1600

4500

Other Areas (east side)

8000

3000

33000

Total

50000

---

86500

TABLE 3

Nutrient Concentrations in Salton Sea Inflows

Alamo R.
New R.
IID Direct
Whitewater R.

Other CV Drains

Org.-N, mg/l

1.23 

0.97 

0.40 

0.83 

0.40 

NH3-n, mg/l

0.58 

0.47 

0.15 

0.16 

0.15 

NO2-N, mg/l

0.32 

0.22 

0.04 

0.06 

0.04 

NO3-N, mg/l

6.00*

4.48*

9.98 

6.28*

9.98 

O-P, mg/l

0.2 

0.29 

0.04 

0.26 

0.04 

T-P, mg/l

0.33 

0.60 

0.06 

0.58 

0.06 

* Includes FWPCA and DWR data

TABLE 4

Alamo R.
New R.
IID Direct
Whitewater R.
Other CV Drains
Total

Ave. Ann. Flow Acre-feet

636700

413000

89200

76300

49500

1264800

Org.-N, lb.

2130000

1100000

97000

170000

54000

3551000

NH3-N, lb.

1000000

530000

36000

33000

20000

1619000

NO2-N, lb.

550000

250000

10000

10000

5000

825000

NO3-N, lb.

10400000

5030000

2420000

1300000

1350000

20500000

O-P, lb.

350000

330000

10000

54000

5000

749000

T-P, mg/l

570000

670000

15000

120000

8000

1383000

Total N, lb.

14080000

6910000

2563000

1513000

1429000

26495000

TABLE 5

Nutrients from Municipal and Industrial Waste Discharges*

Sources

Organic Nitrogen

Ammonia Nitrogen

Ortho-Phosphorus

Calipatria

3900

2900

7700

Imperial

9200

12700

8900

Holtville

7800

19000

11900

El Centro

96200

99600

69800

Calexico

48300

94500

58400

NAS, El Centro

4500

2600

5000

Pioneer Hospital

3800

200

1400

Brawley

39900

70700

38700

Westmorland

5300

8300

5000

Mexicali

156100

305400

188500

Total

375000

615900

395400

* Includes municipal and industrial wastes in the Imperial Valley but does not inlcude Holly Sugar, Valley Nitrogen, Seeley County Water District or Niland. Data from samples collected between July 1968 and May 1969.

TABLE 6

Salton Sea Water Quality

Summer
Autumn
Winter
Spring

N03-N (mg/l)

0.10

0.16

0.14

0.19

N02-N (mg/l)

0.01

0.06

0.02

0.30

NH3-N (mg/l)

0.22

0.36

0.25

0.27

Org.-N (mg/l)

2.80

2.90

1.20

4.20

Total N (mg/l)

3.13

3.48

1.61

4.96

Ortho P (mg/l)

0.04

0.02

0.03

0.06

Total P (mg/l)

0.06

0.05

0.07

0.20

Chlorophyll a (ug/l)

---

50.40

35.70

48.20

pH

7.80

7.60

8.60

8.40

Temperature 0C

29.50

23.10

15.20

23.30

Transparency (feet)

3.60

4.10

3.40

3.50

Eutrophic Depth (feet)

---

10.40

8.50

10.00

TABLE 7

Analysis of Salton Sea sediment samples

Moisture
Carbon %
Nitrogen %
Phosphorus %
Iron %
C-N

Sample

Date

Content %
Solids %
dry
wet
dry
wet
dry
wet
dry
wet
ratio

4

10/29/68

70.4

29.6

4.3

1.3

0.36

0.11

0.068

0.020

2.3

0.7

12-1

5

10/29/68

29.1

69.9

1.8

1.2

0.09

0.06

0.056

0.039

1.3

0.9

20-1

1

11/13/68

73.1

26.9

4.7

1.3

0.35

0.09

0.068

0.018

2.3

0.6

13-1

2

11/13/69

69.5

30.5

8.5a

2.6

0.36

0.11

0.056

0.017

1.6

0.5

23-1

Core top 20cm (a)

11/13/69

68.1

31.9

3.9

1.2

0.18

0.06

0.064

0.020

2.4

0.8

20-1

Core middle 20cm

11/13/69

58.4

41.4

2.4

1.0

0.28

0.12

0.064

0.027

3.0

1.3

8-1

Core bottom 20cm

11/13/69

47.9

52.1

1.9

1.0

0.18

0.09

0.064

0.033

2.3

1.2

10-1

Notes:

Carbon and nitrogen determined on air dried samples.
Moisture determined by drying samples at 1050C.
Phosphorus and iron determined on these samples

(a)

This sample contained many shells. Carbon representsboth inorganic carbon (carbonate) and organic carbon 15.

TABLE 8

Algal Populations of the Salton Sea*

Date of
Sample

Chlorophyta
(Green algae)
Pyrrophyta
(Dinoflagellates)
Chrysophyta
(Diatoms)
Total
Count

7/16/68

640

4600

960

6300

8/21/68

200

1200

13000

15000

8/28/68

370

1000

5000

7100

9/28/68

11000

1200

730

13000

10/28/68

8500

2700

400

12000

11/7/68

8500

2700

400

11000

11/14/68

4200

2700

280

7200

12/3/68

4200

1500

4800

11000

1/25/69

1000

17000

6900

25000

5/24/69

2400

3300

250

6600

TABLE 9
Populations of Predominant Algal Species Found in the Salton Sea*

Species

7/16/68
8/21/68
8/28/68
9/28/68

10/28/68

11/7/68
11/14/68
12/3/68

1/25/1969
to 2/15/00

4/24 to 5/2

Cyclotella caspia

210

380

35

35

200

190

100

1100

180

170

Nitzschia longissima

96

110

140

140

7

0

0

70

26

22

Nitzschia sp.

450

0

280

280

130

300

70

3000

6300

11

Pleurosigma sp.

61

380

440

208

63

170

70

430

1200

32

Thalassionema nitzschoides

130

13000

3700

0

0

8

0

0

0

3

Cachonina niei

880

60

130

0

620

360

730

230

12000

1800

Gyrodinium resplendens

2500

130

96

35

410

520

310

1100

1300

1100

Peridinium sp.

870

910

640

980

1400

720

1100

58

16

27

Eutreptia sp.

140

190

250

180

49

8

0

0

0

0

Motile Green A

360

48

52

210

4800

4200

2600

2600

430

200

Motile Green B

78

0

240

10000

3700

5400

1600

1600

260

1400

* Numbers per milliliter. Numbers represent the average of all surface samples taken in each period

TABLE 10

Dominant Algal Species Found in the Salton Sea
from
July 1968 through May 1969

Species

Maximum numbers in
collections per ml
Volume of Maximum
Number (
m3 x 106 per ml)

Chrysophyta

Cyclotella caspia

3800

1.50

Nitzschia longissima

540

0.11

Nitzschia sp.

11000

0.28

Pleurosigma sp.

4400

3.50

Thalassionema nitzschoides

22000

3.80

Pyrrophyta

Gyrodinium resplendens

9400

93.00

Peridinium sp.

4600

35.00

Cachonina niei

89000

270.00

Exuviella sp.

25000

10.00

Euglenophyta

Eutreptia sp.

500

2.00

Chlorophyta

Motile Green A*

5100

0.46

Motile Green B*

10000

1.10