Page 1

Assembled trap

Bolt

Bolt

Trap jars

Screens

Dive weights (6kg)

Rope threading

8-mm rope

Trap cones

13mm sockets

13mm sockets

Cut cable ties to remove

Unscrew to removeand screw on lid

A 125 mm Troll float is used as a subsurface float

Lift by the rope only and keep vertical

Rest the trap on the side of the boat on the bottom plate

Puncture the parcel-tape patch to spill excess water

If sediment above the patch, catch the water and sediment in the 5-litre jug and transfer to a 2-litre bottle and label

The bottom trap will have more sediment than the top !

Traps @ 1, 2, 6, and 7 are likely to have large amounts of sediment

There are 2 traps at the top and two at the bottom = 4 traps per line

= total of 40 traps

Sediment trap River delta sediment

Sediment Coring Map

General locations of proposed sediment traps and delta samples

1

2

3

4

56

7

8

9

10

Trap coordinates Depth1 35o 19.085’ 3.8 m

174o 07.528’

2 35o 18.481’ 7.3 m174o 10.308’

3 35o 15.834’ 8.0 m174o 06.096’

4 35o 13.719’ 22.0 m174o 06.262’

5 35o 11.311’ 44.0 m 174o 08.605’

6 35o 11.960’ 9.0 m174o 02.051’

7 35o 10.896’ 9.0 m174o 02.567’

8 35o 11.274’ 29.5 m174o 06.235’

9 35o 15.035’ 17.0 m174o 10.063’

10 35o 14.290’ 14.5 m174o 12.530’

Field trip 23-27 November 2009

LIN09305 / CSI

15A

16A

17A

19A

18A

Sediment trap River delta sediment

Sediment Coring Map

General locations of proposed sediment traps and delta samples

1

2

3

4

56

7

8

9

10

Trap coordinates Depth1 35o 19.085’ 3.8 m

174o 07.528’

2 35o 18.481’ 7.3 m174o 10.308’

3 35o 15.834’ 8.0 m174o 06.096’

4 35o 13.719’ 22.0 m174o 06.262’

5 35o 11.311’ 44.0 m 174o 08.605’

6 35o 11.960’ 9.0 m174o 02.051’

7 35o 10.896’ 9.0 m174o 02.567’

8 35o 11.274’ 29.5 m174o 06.235’

9 35o 15.035’ 17.0 m174o 10.063’

10 35o 14.290’ 14.5 m174o 12.530’

Field trip 23-27 November 2009

LIN09305 / CSI

15A

16A

17A

19A

18A

South Pacific Ocean. New Zealand. North Island – 1:502,000