DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 54800 | 89500 | 86200 | 49000 | 183000 | 110000 | 108000 | 280000 | 271000 | 203000 | 205000 | 89700 |
2 | 61400 | 99100 | 87400 | 58200 | 175000 | 120000 | 109000 | 286000 | 271000 | 199000 | 212000 | 88500 |
3 | 66800 | 149000 | 85100 | 66300 | 157000 | 117000 | 111000 | 294000 | 270000 | 187000 | 208000 | 84300 |
4 | 65700 | 183000 | 86900 | 75400 | 155000 | 119000 | 113000 | 296000 | 262000 | 185000 | 197000 | 77800 |
5 | 68800 | 175000 | 86700 | 77700 | 164000 | 122000 | 111000 | 289000 | 255000 | 177000 | 180000 | 72400 |
6 | 106000 | 129000 | 85500 | 89700 | 160000 | 124000 | 116000 | 271000 | 254000 | 179000 | 160000 | 71900 |
7 | 120000 | 93600 | 98600 | 85800 | 176000 | 127000 | 123000 | 259000 | 252000 | 183000 | 147000 | 65500 |
8 | 98200 | 88000 | 131000 | 85400 | 208000 | 120000 | 132000 | 252000 | 251000 | 182000 | 142000 | 73000 |
9 | 63800 | 91200 | 119000 | 82400 | 199000 | 127000 | 126000 | 247000 | 253000 | 181000 | 137000 | 69500 |
10 | 85000 | 102000 | 87800 | 84800 | 170000 | 122000 | 174000 | 244000 | 252000 | 180000 | 125000 | 61700 |
11 | 74100 | 152000 | 85900 | 86100 | 152000 | 119000 | 193000 | 237000 | 249000 | 172000 | 114000 | 58800 |
12 | 60600 | 168000 | 93200 | 83100 | 150000 | 120000 | 193000 | 231000 | 246000 | 164000 | 111000 | 53000 |
13 | 60000 | 158000 | 90400 | 84100 | 164000 | 126000 | 204000 | 226000 | 243000 | 154000 | 101000 | 59500 |
14 | 67300 | 144000 | 91600 | 82800 | 175000 | 132000 | 207000 | 225000 | 242000 | 147000 | 103000 | 57100 |
15 | 64000 | 128000 | 90000 | 85300 | 171000 | 118000 | 214000 | 222000 | 242000 | 135000 | 98700 | 62300 |
16 | 61400 | 114000 | 87200 | 87800 | 168000 | 116000 | 226000 | 221000 | 243000 | 127000 | 98300 | 58000 |
17 | 62000 | 107000 | 87000 | 85200 | 161000 | 115000 | 239000 | 225000 | 244000 | 121000 | 96700 | 62400 |
18 | 75000 | 109000 | 82600 | 82800 | 159000 | 114000 | 236000 | 232000 | 245000 | 118000 | 95100 | 60600 |
19 | 130000 | 107000 | 83300 | 80700 | 162000 | 131000 | 246000 | 238000 | 244000 | 122000 | 88600 | 64300 |
20 | 173000 | 105000 | 81600 | 77200 | 162000 | 139000 | 254000 | 244000 | 242000 | 120000 | 80400 | 50500 |
21 | 185000 | 101000 | 79900 | 76000 | 152000 | 133000 | 254000 | 246000 | 240000 | 126000 | 84400 | 62100 |
22 | 172000 | 97600 | 58600 | 93100 | 145000 | 124000 | 256000 | 248000 | 237000 | 129000 | 83900 | 51200 |
23 | 151000 | 94700 | 66600 | 160000 | 143000 | 127000 | 261000 | 255000 | 232000 | 128000 | 86100 | 52900 |
24 | 128000 | 90500 | 48800 | 175000 | 135000 | 137000 | 265000 | 258000 | 227000 | 121000 | 88000 | 54200 |
25 | 109000 | 94200 | 38700 | 163000 | 121000 | 136000 | 260000 | 258000 | 223000 | 130000 | 91300 | 54000 |
26 | 92600 | 90400 | 33900 | 158000 | 121000 | 129000 | 259000 | 259000 | 218000 | 143000 | 92400 | 52300 |
27 | 88100 | 90100 | 46100 | 152000 | 121000 | 125000 | 261000 | 262000 | 213000 | 154000 | 94000 | 54700 |
28 | 89700 | 90000 | 44600 | 144000 | 115000 | 124000 | 260000 | 264000 | 205000 | 167000 | 94200 | 56800 |
29 | 88800 | 89500 | 37800 | 152000 | --- | 122000 | 264000 | 267000 | 200000 | 179000 | 96300 | 65300 |
30 | 90300 | 89700 | 37000 | 157000 | --- | 116000 | 272000 | 271000 | 197000 | 189000 | 95000 | 77400 |
31 | 89700 | --- | 38400 | 168000 | --- | 116000 | --- | 272000 | --- | 195000 | 93100 | --- |
MEAN | 93620 | 114000 | 76050 | 102800 | 158000 | 123500 | 201600 | 254200 | 240800 | 158000 | 119300 | 64060 |
MAX | 185000 | 183000 | 131000 | 175000 | 208000 | 139000 | 272000 | 296000 | 271000 | 203000 | 212000 | 89700 |
MIN | 54800 | 88000 | 33900 | 49000 | 115000 | 110000 | 108000 | 221000 | 197000 | 118000 | 80400 | 50500 |
IN. | .63 | .74 | .51 | .69 | .96 | .83 | 1.31 | 1.71 | 1.57 | 1.06 | .80 | .42 |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1987 - 1999, BY WATER YEAR (WY) | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
MEAN | 94670 | 98100 | 93000 | 84290 | 99090 | 148300 | 191900 | 197600 | 165700 | 149800 | 111800 | 87710 |
MAX | 334900 | 171300 | 169900 | 161000 | 158000 | 217400 | 342100 | 333300 | 263900 | 469300 | 416900 | 309900 |
(WY) | 1987 | 1987 | 1993 | 1993 | 1999 | 1997 | 1993 | 1993 | 1996 | 1993 | 1993 | 1993 |
MIN | 28050 | 33270 | 31810 | 34800 | 40940 | 72220 | 82570 | 69140 | 36310 | 30420 | 37230 | 37850 |
(WY) | 1989 | 1990 | 1990 | 1990 | 1989 | 1989 | 1990 | 1988 | 1988 | 1988 | 1988 | 1988 |
SUMMARY STATISTICS | FOR 1998 CALENDAR YEAR | FOR 1999 WATER YEAR | WATER YEARS 1987 - 1999 | |||
---|---|---|---|---|---|---|
ANNUAL MEAN | 147800 | 141900 | 126900 | |||
HIGHEST ANNUAL MEAN | 250700 | 1993 | ||||
LOWEST ANNUAL MEAN | 53860 | 1989 | ||||
HIGHEST DAILY MEAN | 356000 | Apr 17 | 296000 | May 4 | 596000 | Aug 3 1993 |
LOWEST DAILY MEAN | 33900 | Dec 26 | 33900 | Dec 26 | 20100 | Dec 14 1988 |
ANNUAL SEVEN-DAY MINIMUM | 39500 | Dec 25 | 39500 | Dec 25 | 23600 | Dec 12 1988 |
INSTANTANEOUS PEAK FLOW | 296000 | May 4 | 598000 | Aug 1 1993 | ||
INSTANTANEOUS PEAK STAGE | 23.05 | May 4 | 441.96 | Aug 1 1993 | ||
INSTANTANEOUS LOW FLOW | 33900 | Dec 26 | 20100 | Dec 14 1988 | ||
ANNUAL RUNOFF (INCHES) | 11.72 | 11.25 | 10.07 | |||
10 PERCENT EXCEEDS | 270000 | 252000 | 246000 | |||
50 PERCENT EXCEEDS | 122000 | 124000 | 100000 | |||
90 PERCENT EXCEEDS | 54600 | 63900 | 44600 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |