Visit May 29, 4:00 p.m. sunny, 26°C, 4 mph E wind.

Recent heavy rain previous week, followed by hot weatherl dry underfoot.

NOTE: the pond 1-2 is becoming unacceptable.

 

 

Samples collected

  1. NOT [Between bank & centre weeds in main pond (open water) ]
  2. Adjacent to weir in main pond within new typha angustifolia

    3. There was a scum of empty midge pupae around the pond.

    The pond level had dropped 150 mm in 6 days.

    There were 6 ducks on the pond.

  3. NOT Downstream from pond, above first "weir"
  4. NOT [Hedge pond = now a patch of mud with no water]
  5. NOT [Pond at northern extreme of site]

 

1

2

3

4

5

PH

 

8.3

 

 

 

Nitrates

 

 

 

 

 

Nitrites

 

 

 

 

 

Clarity

 

 

 

 

 

Mayfly

 

No

 

 

 

Shrimp

 

No

 

 

 

Water louse

 

Yes

 

 

 

Blood worm

 

Yes

 

 

 

Gnat/mosquito

 

 

 

 

 

Rat-tailed maggot

 

 

 

 

 

 

 

 

 

 

 

Fe

 

 

 

 

 

Dissolved Oxygen mg/l

 

5.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Daphnia

 

 

 

 

 

 

 

 

 

 

 

 Midge larva, & pupa

 

 

 

 

 

 

 

 

 

 

 

 Water boatman

 

 

 

 

 

 

 

 

 

Water quality

 

Fair - poor

 

 

 
           

 

There was a scum of empty midge pupae around the pond.

|-------------- 10 mm ------------------|

Empty midge pupae case. Swarms of midges will be very unpleasant.

Photo of the pond dish containing water louse, water boatman, flatworm & daphnia.