Columbia River Water Temperatures and Temperature Units below Bonneville Dam

COLUMBIA RIVER WATER TEMPERATURES (F) AND TEMPERATURE UNITS (C) BELOW BONNEVILLE DAM, 2003-2004.
(Data source: Ives Island Gauge 1 thru March 27, 2005; 5 year average of Gauge 1 March 28 thru June 30.)
OCTOBER NOVEMBER DECEMBER JANUARY FEBURARY MARCH APRIL MAY JUNE
TEMP TU's TEMP TU's TEMP TU's TEMP TU's TEMP TU's TEMP TU's TEMP TU's TEMP TU's TEMP TU's
DAY (F) (C) (F) (C) (F) (C) (F) (C) (F) (C) (F) (C) (F) (C) (F) (C) (F) (C)
1 61 16 50 10 47 8 41 5 37 3 40 4 45   7 51   11 57   14
2 60 16 54 12 47 8 41 5 37 3 40 4 45   7 51   11 57   14
3 60 16 53 12 47 8 41 5 37 3 40 4 45   7 51   10 57   14
4 61 16 52 11 47 8 40 5 38 3 40 4 45   7 51   11 58   15
5 60 16 52 11 47 8 40 4 38 3 40 4 46   8 51   11 59   15
6 60 16 49 10 46 8 40 4 38 3 40 5 46   8 51   11 59   15
7 59 15 51 10 46 8 39 4 38 3 41 5 46   8 52   11 59   15
8 62 16 48 9 46 8 39 4 38 3 41 5 46   8 52   11 59   15
9 62 17 49 10 46 8 39 4 38 3 42 6 46   8 52   11 59   15
10 60 15 51 10 46 8 39 4 38 3 43 6 47   8 52   11 59   15
11 58 15 51 11 46 8 39 4 38 3 42 6 47   8 52   11 59   15
12 60 15 50 10 46 8 39 4 38 3 42 6 47   8 52   11 59   15
13 61 16 51 10 45 7 39 4 38 4 42 6 47   8 53   11 59   15
14 60 16 50 10 45 7 38 3 39 4 43 6 48   9 53   12 59   15
15 61 16 50 10 45 7 37 3 38 4 43 6 48   9 54   12 60   15
16 60 16 51 10 45 7 36 2 38 4 43 6 48   9 54   12 60   15
17 56 14 50 10 44 7 36 2 38 3 43 6 49   9 53   12 60   15
18 53 11 50 10 44 7 36 2 38 3 43 6 49   9 53   12 61   16
19 56 14 50 10 44 7 36 2 38 3 43 6 49   10 54   12 60   16
20 60 15 49 9 44 7 37 3 38 4 43 6 49   10 55   13 60   16
21 58 15 49 9 44 7 37 3 39 4 43 6 49   10 55   13 61   16
22 59 15 48 9 44 7 37 3 39 4 43 6 50   10 55   13 61   16
23 59 15 48 9 44 7 37 3 39 4 43 6 50   10 56   13 61   16
24 56 13 49 9 44 7 37 3 39 4 44 6 50   10 56   13 61   16
25 53 12 49 9 43 6 37 3 39 4 44 7 50   10 57   14 61   16
26 55 13 48 9 43 6 37 3 39 4 44 7 50   10 57   14 62   17
27 57 14 48 9 43 6 36 2 39 4 44 7 50   10 57   14 63   17
28 55 13 47 9 42 6 36 2 40 4 44   7 50   10 57   14 64   18
29 53 11 46 8 42 6 37 3 44   7 50   10 57   14 64   18
30 51 10 47 8 42 6 37 3 45   7 51   10 57   14 64   18
31 8 42 5 37 3 45   7       57   14      
TOTAL -- 445 -- 294 -- 218 -- 102 -- 98 -- 180 -- 267 -- 375 -- 467
AVE. 58 14 50 10 45 7 38 3 38 3 42 6 48 9 54 12 60 16
REQUIRED TEMPERATURE UNITS (TU'S) CUMULATIVE TU'S (C) SINCE INITIATION AND END OF SPAWNING
FALL CHINOOK           (C)   FALL CHINOOK                                  
EMERGENCE
EVENT     DATE EYED OUT HATCHING G11 River2 Bed3 OS4
EYE OUT 250 BEGIN SPAWNING 12-Oct 10/29 11/23 3/4     1/14   12/13   12/22
HATCHING 500 PEAK SPAWNING 16-Nov 12/15 2/13 4/30 1/31 2/25
EMERGENCE 1000 END SPAWNING 28-Dec 3/7 4/13 5/28              
     
CHUM               (C)   CHUM                                      
     
  EVENT DATE   G11 River2 Bed3 OS4
EYE OUT 400 BEGIN SPAWNING 9-Nov 12/27 2/22 4/3     2/23   1/6   1/19
HATCHING 600 PEAK SPAWNING 3-Dec 2/28 4/3 4/28 2/8 3/4
EMERGENCE 825 END SPAWNING 28-Dec 4/1 4/24 5/15         3/11    
1 G1 guage is located at the head of Ives Island spawning area.
2 River represents the emergence estimate based on average daily river temperatures taken from 1-3 guages within the Hamlilton Channel, above the substrate.
3 Bed represents the emergence estimate based on average daily bed temperatures taken from 1-3 guages within the Hamlilton Channel, 56cm below the substrate.
4 OS represents the emergence estimate based on average daily bed temperatures taken from 1-3 guages within the Hamlilton Channel, 30cm below the substrate (estimated redd pocket depth).
  estimated Gauge 1 temperatures based on a five year average (2000-2004).