N The New Zealand connection: Rotorua lakes David Hamilton and Chris McBride University of Waikato, New Zealand Location Stream nitrate levels.

N

The New Zealand connection: Rotorua lakes

0

200

400

600

800

1000

NH4 NO3 TKNm

g-N

/m3

.

0

50

100

150

DRP TP

0

50

100

150

DRP TP

68-70

76-77

87-89

91-95

02-03

David Hamilton and Chris McBrideUniversity of Waikato, New Zealand

Location Stream nitrate levels

DO

chl a

pH/chloride/temp

DO

Th

erm

istor strin

g (1

1 se

nso

rs)~1.5 m

~ 20m

redox/nitrate/temp

pH/chloride/temp

Light meters

Sensors – Lake stations

• Thermistor string - Apprise Technologies “TempLine”

• Dissolved oxygen - Zebra-tech “d-opto” optical sensors

• Fluorometer – Seapoint chlorophyll fluorometer

• pH and chloride – INW “TempHion T3” sensors

• Irradiance – Appogee QSO quantum sensors

• Datalogger – iQuest “DS-4483” logger

Buoy design

L. Rotorua L. Rotoiti:Narrows

L. Tarawera

L. Rotoiti:Crater

Tarawera:Weather station

Select a lake or weather station from the map above to view summary graphs/data

ORChoose your own sensors/lakes/date ranges to make graphs or download data.

Rotorua Lakes remote sensor network

Web interface - Lake Rotorua

0 m

TempLinethermistor

string

2 m

4 m

6 m

8 m

10 m

12 m

14 m

16 m

18 m

20 m

21.4 °C

21.4 °C

21.4 °C

21.4 °C

21.4 °C

21.4 °C

21.4 °C

21.4 °C

21.4 °C

21.4 °C

21.4 °C

30

10

20

25

15

0

20

10

5

15

Values logged at:14:15:00

Sensor ValueLast

loggedGraph last:

Graph last:

Graph last:

DO [%sat]- surface 9.00 14:15:00 1 week 6 months

DO [%sat] - bottom 5.00 14:15:00 24 h 1 week 6 months

Chlorophyll a [ug L-1] 10.00 14:15:00 24 h 1 week 6 months

pH - surface 7.00 14:15:00 24 h 1 week 6 months

pH - bottom 7.00 14:15:00 24 h 1 week 6 months

Cl- [ppm]- surface 0.00 14:15:00 24 h 1 week 6 months

Cl- [ppm] - bottom 0.00 14:15:00 24 h 1 week 6 months

ORP - bottom 0.00 14:15:00 24 h 1 week 6 months

NO3- [ppm] - bottom 0.00 14:15:00 24 h 1 week 6 months

De

pth

[m

]

Te

mp

era

ture

[oC

]

JunMarDecSep

24 h

Homepage

Last: 2 weeks 2 months 1year

Web interface - Lake Rotorua

Web interface - Lake Rotorua