ARKANSAS RIVER BASIN

07091200 ARKANSAS RIVER NEAR NATHROP, CO-Continued

WATER-QUALITY RECORDS

PERIOD OF RECORD.-- October to November 1964, October 1968 to September 1982, April to October 1987, April 1989 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=07091200

PERIOD OF DAILY RECORD.--

SPECIFIC CONDUCTANCE: April 1989 to September 1993.

pH: April 1989 to September 1993.

WATER TEMPERATURE: April 1989 to September 1993, April 1996 to current year (seasonal records only).

INSTRUMENTATION.--Water-temperature probe with satellite telemetry.

REMARKS.--Daily water-temperature records are good. Reported values may not be representative of the stream when flows are less than about 210 ft3/s.

EXTREMES FOR PERIOD OF RECORD.--

WATER TEMPERATURE: Maximum (occurred during period of seasonal record), 22.3°C, July 21, 2002; minimum, 0.0°C on many days.

EXTREMES FOR CURRENT YEAR.--

WATER TEMPERATURE (seasonal only): Maximum, 19.7°C, Aug. 5; minimum, 2.5°C, Apr. 8.

MISCELLANEOUS FIELD MEASUREMENTS, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Time	Instan- taneous dis- charge, cfs (00061)	Specif. conduc- tance, wat unf uS/cm 25 degC (00095)		Date	Time	Instan- taneous dis- charge, cfs (00061)	Specif. conduc- tance, wat unf uS/cm 25 degC (00095)
OCT					AUG
04...	1000	252	189		05...	1900	529	141
MAR					25...	1315	357	165
14...	1100	167	189		SEP
APR					19...	1400	384	160
30...	1615	304	142
MAY
29...	1315	2,540	90

Temperature, water, degrees Celsius 

WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

DAY	MAX	MIN	MEAN	MAX	MIN	MEAN	MAX	MIN	MEAN	MAX	MIN	MEAN
	OCTOBER			NOVEMBER			DECEMBER			JANUARY
1	---	---	---	---	---	---	---	---	---	---	---	---
2	---	---	---	---	---	---	---	---	---	---	---	---
3	---	---	---	---	---	---	---	---	---	---	---	---
4	---	---	---	---	---	---	---	---	---	---	---	---
5	---	---	---	---	---	---	---	---	---	---	---	---
6	---	---	---	---	---	---	---	---	---	---	---	---
7	---	---	---	---	---	---	---	---	---	---	---	---
8	---	---	---	---	---	---	---	---	---	---	---	---
9	---	---	---	---	---	---	---	---	---	---	---	---
10	---	---	---	---	---	---	---	---	---	---	---	---
11	---	---	---	---	---	---	---	---	---	---	---	---
12	---	---	---	---	---	---	---	---	---	---	---	---
13	---	---	---	---	---	---	---	---	---	---	---	---
14	---	---	---	---	---	---	---	---	---	---	---	---
15	---	---	---	---	---	---	---	---	---	---	---	---
16	---	---	---	---	---	---	---	---	---	---	---	---
17	---	---	---	---	---	---	---	---	---	---	---	---
18	---	---	---	---	---	---	---	---	---	---	---	---
19	---	---	---	---	---	---	---	---	---	---	---	---
20	---	---	---	---	---	---	---	---	---	---	---	---
21	---	---	---	---	---	---	---	---	---	---	---	---
22	---	---	---	---	---	---	---	---	---	---	---	---
23	---	---	---	---	---	---	---	---	---	---	---	---
24	---	---	---	---	---	---	---	---	---	---	---	---
25	---	---	---	---	---	---	---	---	---	---	---	---
26	---	---	---	---	---	---	---	---	---	---	---	---
27	---	---	---	---	---	---	---	---	---	---	---	---
28	---	---	---	---	---	---	---	---	---	---	---	---
29	---	---	---	---	---	---	---	---	---	---	---	---
30	---	---	---	---	---	---	---	---	---	---	---	---
31	---	---	---	---	---	---	---	---	---	---	---	---
MONTH	---	---	---	---	---	---	---	---	---	---	---	---
	FEBRUARY			MARCH			APRIL			MAY
1	---	---	---	---	---	---	11.3	5.9	8.9	12.1	7.4	9.4
2	---	---	---	---	---	---	10.6	6.7	8.8	11.8	7.7	9.8
3	---	---	---	---	---	---	9.6	5.4	7.6	12.4	8.6	10.5
4	---	---	---	---	---	---	8.5	3.8	6.2	12.2	8.1	9.8
5	---	---	---	---	---	---	6.9	3.7	5.5	12.0	7.7	10.0
6	---	---	---	---	---	---	7.2	3.5	5.5	13.6	7.9	10.7
7	---	---	---	---	---	---	7.1	3.1	5.3	12.3	7.6	9.9
8	---	---	---	---	---	---	9.2	2.5	5.7	11.7	7.2	9.6
9	---	---	---	---	---	---	11.1	3.9	7.5	12.7	7.9	10.2
10	---	---	---	---	---	---	12.1	5.8	9.1	12.7	7.3	10.0
11	---	---	---	---	---	---	12.4	6.5	9.6	13.4	6.4	10.1
12	---	---	---	---	---	---	11.5	6.9	9.2	15.2	8.0	11.6
13	---	---	---	---	---	---	12.7	6.3	9.6	15.4	9.5	12.5
14	---	---	---	---	---	---	12.0	7.1	9.9	15.3	9.6	12.6
15	---	---	---	---	---	---	11.3	7.5	8.9	14.8	11.2	12.3
16	---	---	---	---	---	---	11.0	4.7	7.7	16.0	9.2	12.5
17	---	---	---	---	---	---	10.5	6.4	8.6	15.8	11.3	13.6
18	---	---	---	---	---	---	11.5	6.3	8.7	13.9	11.2	12.3
19	---	---	---	---	---	---	10.7	6.5	7.6	14.5	10.6	12.3
20	---	---	---	---	---	---	11.3	5.7	8.2	12.1	9.8	10.6
21	---	---	---	---	---	---	12.1	7.2	9.6	14.5	8.9	11.4
22	---	---	---	---	---	---	11.6	8.1	10.0	15.2	10.2	12.7
23	---	---	---	---	---	---	10.2	5.8	7.4	14.9	10.8	12.9
24	---	---	---	---	---	---	10.1	3.9	6.7	14.9	11.1	13.1
25	---	---	---	---	---	---	13.1	6.0	9.5	13.0	10.6	11.7
26	---	---	---	---	---	---	14.0	7.9	11.1	12.4	9.3	11.0
27	---	---	---	---	---	---	12.9	8.2	10.8	14.3	10.2	12.2
28	---	---	---	---	---	---	13.0	7.5	10.4	14.4	11.0	12.8
29	---	---	---	---	---	---	14.0	7.9	11.1	13.7	11.0	12.4
30	---	---	---	---	---	---	14.0	8.4	11.0	12.8	11.2	12.0
31	---	---	---	---	---	---	---	---	---	12.2	10.4	11.4
MONTH	---	---	---	---	---	---	14.0	2.5	8.5	16.0	6.4	11.4
	JUNE			JULY			AUGUST			SEPTEMBER
1	12.2	11.0	11.6	17.2	13.4	15.3	18.0	14.6	16.3	18.5	13.6	16.1
2	13.2	10.0	11.6	17.9	13.5	15.7	19.6	15.2	17.2	18.0	13.6	16.0
3	13.5	10.4	12.1	18.1	14.2	16.2	19.4	16.2	17.7	16.8	13.7	14.6
4	13.5	10.6	12.1	18.3	14.0	16.2	19.5	15.8	17.6	18.0	12.2	14.9
5	12.6	10.5	11.4	16.8	13.7	15.5	19.7	15.2	17.4	17.2	13.6	15.5
6	12.3	9.7	10.9	16.1	13.4	14.9	17.9	15.2	16.8	16.8	13.3	14.9
7	13.4	10.4	11.8	17.8	13.1	15.5	17.9	14.7	16.4	15.0	12.9	13.9
8	14.3	10.0	12.1	18.7	13.9	16.3	19.1	15.3	17.1	15.8	11.1	13.5
9	13.7	10.9	12.3	18.8	14.3	16.5	18.7	15.6	17.3	14.7	12.4	13.1
10	13.3	10.4	12.0	18.8	13.9	16.4	18.3	15.5	17.0	12.8	10.6	11.6
11	14.8	10.8	12.8	18.1	14.3	16.3	19.0	15.6	17.3	13.4	9.2	11.2
12	13.9	11.5	12.9	18.1	14.5	16.3	18.3	15.1	16.8	14.7	9.3	11.9
13	13.0	11.0	11.9	18.6	14.6	16.5	19.6	14.8	17.1	13.5	10.1	11.6
14	14.7	10.9	12.8	17.6	14.2	15.9	19.2	14.4	16.9	13.5	8.7	11.0
15	15.3	12.0	13.8	16.6	13.9	15.5	19.1	14.5	16.9	14.3	9.0	11.7
16	14.3	12.3	13.2	17.3	14.0	15.7	18.3	14.8	16.7	15.0	9.7	12.3
17	13.1	10.8	12.0	18.9	14.2	16.5	17.2	13.7	15.7	15.4	11.0	13.1
18	14.0	11.3	12.6	19.6	15.3	17.4	16.5	13.5	15.1	14.2	9.3	11.9
19	14.7	11.0	12.8	17.7	15.8	16.9	17.6	12.8	15.2	14.1	8.7	11.4
20	13.2	11.2	12.4	17.4	15.0	16.3	18.5	13.8	16.3	14.1	9.9	12.0
21	15.0	10.7	12.9	18.1	14.9	16.5	17.9	14.9	16.4	14.1	9.3	11.7
22	15.3	11.6	13.6	18.5	14.9	16.5	18.2	14.5	16.4	14.3	8.9	11.7
23	15.5	12.0	13.9	18.1	15.5	16.8	17.2	14.4	15.8	14.5	9.3	12.0
24	15.4	11.7	13.6	19.6	14.9	17.0	17.1	14.2	15.7	14.6	9.3	12.0
25	15.8	11.8	13.8	18.1	15.6	16.9	16.3	14.3	15.3	14.4	9.6	12.2
26	16.3	11.9	14.1	18.9	15.2	17.0	16.9	13.5	15.1	14.7	9.2	12.0
27	17.0	12.5	14.8	17.8	15.9	16.9	17.9	13.9	15.7	14.2	9.8	12.2
28	17.2	12.7	14.9	18.3	14.8	16.7	16.3	14.5	15.2	14.0	9.4	11.8
29	16.1	13.0	14.9	18.8	15.5	16.9	17.6	12.9	15.0	14.1	9.1	11.7
30	17.3	13.0	15.0	18.7	15.0	16.8	16.6	13.9	15.1	13.7	9.6	11.8
31	---	---	---	18.1	15.2	16.5	18.1	13.5	15.6	---	---	---
MONTH	17.3	9.7	12.9	19.6	13.1	16.3	19.7	12.8	16.3	18.5	8.7	12.7