Water-Quality Assessment of the Sacramento River
Basin, California: Water-Quality, Sediment and Tissue
Chemistry, and Biological Data, 1995-1998
(Open-File Report 2000-391)

Colusa Basin Drain at Road 99E near Knights Landing, California

Field measurements, total hardness, and suspended sediment

Number of significant figures do not reflect analytical method reporting levels.

[mg/L - milligrams per liter, µS/cm - microsiemens per centimeter, E - estimated discharge value]

Date	Time	Water Temperature (degrees Celsius)	Instantaneous Discharge (cubic meters per second)	Specific Conductance (µS/cm)	Dissolved Oxygen (mg/L)	Dissolved Oxygen, Percent of Saturation (percent)	pH (standard units)	Alkalinity (mg/L As CaCO₃)	Total Hardness (mg/L as CaCO₃)	Suspended Sediment (mg/L)
2/7/96	1030	14	125.46	284	7.1	68	7.7	92	82	373
3/6/96	1030	11.4	E50.98	505	9.6	87	8.1	160	160	202
4/23/96	1030	16.5		595	8.9	91	8.1	210	180	101
5/22/96	1000	18.5		460			7.9	130	130	170
6/14/96	1000	25.9		733	5.8	71	7.9	170	200	146
7/23/96	1000	26.7		759	12.5	157	8.3	200	220	95
8/27/96	1000	21.8	25.69	595	6	69	7.9	210	190	109
9/9/96	1030	20.3	33.42	592	5.8	64	7.8	170	190	136
10/18/96	0950	14.9	0	664	9.8	97	8.3	170	190	75
11/7/96	1330	12.7	16.6	576	7.6	71	7.9	130	180	60
12/3/96	1000	8.9	16.14	613	9.2	79	8	180	190	84
1/14/97	1130	3.7	66.84	600	11.6	87	8.2	180	170	137
2/18/97	1130	11.6	15.83	713	9	82	8.1	210	200	167
3/18/97	1030	13.8	33.42	626	8.2	78	8.3	160	180	278
4/9/97	1100	15.1	14.08	629	9.2	91	8.2	160	190	121
4/24/97	0940	17.8	5.44	517	8.4	89	8.2	140	140	142
5/9/97	0900	21	2.07	583	8	90	8.6	150	160
5/23/97	1030	22.1	E14.16	640	6.4	74	8	150	170	131
6/6/97	1110	23.1	E12.46	712	6	71	8.1	200	200	154
6/17/97	1000	25	3.6	712	9.2	112	8.3	190	200	68
7/10/97	0940	27.8	11.33	714	5.2	67	7.9	230	200	135
7/28/97	1100	26.9	14.33	647	5	63	7.8	220	190	116
8/26/97	1100	22.8	47.29	580	5.5	64	7.8	190	170	226
9/18/97	1000	20.1	15.66	551	6.7	74	8	180	180	148
10/30/97	1040	14.6	5.41	543	8.2	80	8	170	170	75
11/12/97	1130	13.4	13.06	569	5.7	55	7.7	210	180	60
12/17/97	1040	8.9	44.46	547	8.9	77	7.9	150	150	125
1/21/98	1030	9.2	72.22	490	7.8	68	7.9	140	140	156
2/26/98	1100	10.1	402.14	237	9.2	82	7.9	91	80	199
3/11/98	1100	13.4	118.94	486	10.4	99	8.2	170	160	109
4/15/98	1130	14.1	34.83	765	8.4	82	8.3	230	240	119