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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