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Annual median water temperature in rivers, 2007

Annual median water temperature (°C) at the 77 national network sites, 2007

Site
Temperature (°C)
Site elevation (m)
WH1
15.0
237
WH2
16.9
151
WH3
16.5
231
WH4
17.1
159
AK1
15.1
107
AK2
14.8
228
HM1
12.1
413
HM2
14.9
201
HM3
16.6
486
HM4
16.2
383
HM5
15.1
202
HM6
15.4
248
RO1
16.0
455
RO2
16.6
374
RO3
13.3
599
RO4
12.4
528
RO5
15.8
482
RO6
15.3
655
TU1
13.2
553
TU2
9.8
1005
WA1
13.9
257
WA2
10.5
725
WA3
14.6
297
WA4
13.9
423
WA5
10.9
864
WA6
13.2
746
WA7
13.2
371
WA8
14.3
333
WA9
14.4
333
GS1
19.3
385
GS2
13.4
722
GS3
13.6
622
GS4
13.8
607
HV1
11.9
863
HV2
16.8
342
HV3
15.3
663
HV4
9.9
1108
HV5
14.8
732
HV6
11.2
820
WN1
11.1
339
WN2
9.6
576
WN3
12.5
322
WN4
12.9
351
WN5
10.2
829
NN1
11.7
613
NN2
8.5
1049
NN3
8.4
1422
NN4
15.2
847
NN5
10.8
888
GY1
12.1
736
GY2
13.7
485
GY3
12.1
774
GY4
8.5
1009
CH1
10.2
976
CH2
12.2
648
CH3
9.8
1034
CH4
13.4
854
TK1
12.2
542
TK2
9.3
627
TK3
10.0
1020
TK4
11.8
1047
TK5
12.9
695
TK6
11.6
956
AX1
12.7
973
AX2
12.1
1043
AX3
8.3
1200
AX4
11.7
902
DN1
7.2
690
DN2
7.3
672
DN3
9.0
605
DN4
12.3
790
DN5
10.8
470
DN6
9.0
787
DN7
10.0
694
DN8
12.4
449
DN9
11.4
665
DN10
12.2
701
5th percentile (all sites)
8.4
Median (all sites)
12.4
95th percentile (all sites)
16.7
Notes:
(1) Hazen method used to calculate 5th and 95th percentiles.
(2) Order of sites in table is roughly most northern to most southern.
(3) Site elevation is based on highest point in catchment.
Data source: compiled by the Ministry for the Environment using data collected by the National Institute of Water and Atmospheric Research (NIWA).

This data comes from the National River Water Quality Network which is operated by NIWA with funding from the Foundation for Research, Science and Technology.

You can access the national network data for 2007, as well as more site information, in this spreadsheet.

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Last updated: March 2009