Nick Carter, Conservation Officer (Fens)
|
The South West corner large compartment flooded, photo Nick Carter |
Well, we did it, just about. We reached the target level of
11.59 (1.59m above sea level) in the storage lagoon and maintained it for a
month at Hilgay in the Wissey Valley Living Landscape. We have also been able to wet-up much of the rest of the site too so for
the first time we have had significant areas of standing water in all four
corners. Unfortunately the higher water
levels have also exposed some of the issues on the site. The northern shores of
the lagoon have suffered some minor wave erosion with the south westerly winds
we have had over the winter. It also
looks as though a seal has blown in the outlet sluice so that when it is closed
water leaks into the surrounding land under the pressure of water from the
lagoon. Both of these issues mean that
we will have to let water out of the lagoon to plant reeds along the eroded
banksides to give greater protection and to replace the leaking seal. Letting water out means we should reach the
target levels in all the other compartments of the site which will help kill
off terrestrial weeds and help the spread of naturally occurring reeds and
those that were planted in 2013.
|
Oystercatcher and brent goose, photo by Nick Carter |
The higher water levels have also meant wildfowl numbers
have built up over the winter. On the 25 March there was a record 50 tufted duck on the site, along with 3 great crested grebe. Coot, shoveler, shelduck,
mallard, gadwall, teal, pintail and feral greylag, Canada and Egyptian geese
are all present. A surprise visitor was a solitary brent goose which dropped
onto the lagoon for a short time one misty morning. Several pairs of lapwing and one pair of
oystercatcher seem to be settling down for the breeding season while snipe are
still in small winter flocks. Unfortunately with the higher water levels in the
lagoon it looks as though we will lose our little ringed plovers and avocets. No
sand martins have turned up yet, although it is early days, but we have
smoothed some of the sandy ditch sides to encourage breeding.
|
Panks Pump engineers winching pump out of chamber to service it, photo by Nick Carter |
It has been one year since the lagoon pump was installed by
Panks Pumps so it was time for its annual service. This is not as easy as it
sounds as the pump has to be winched out of a 4m deep chamber before work can
start. Fortunately all seems well. It has been running for over 250 hours
during the year which does not sound too much but for the first few months
there was very little water on site for it to pump. It will be much busier over the next 12
months.