Lack of rainfall and a broken pump have been cited by City of London Corporation as the main reason for the shocking levels of the ponds through the park.
The plight of the water courses has been well documented of late; a press release from the Corporation explains the catalogue of issues hampering efforts to address the problem. Closer scrutiny of these reasons, however, suggest that too much is being blamed on the weather.
A study of local rainfall back to 1981 suggests that though the ground water replenishing season (October 1st – April 24th) has been dry it is by no means out of the ordinary.
As you can see from the graph the rainfall here has gone up and down like a yo-yo and 2016-17 is only the fourth driest period: 1991-92, 1995-96, 1996-97 and 2011-12 were drier.
The Corporation’s press release states: “2015-16 was a helpfully wet period for us…”
Wrong. 2015-16 was average. And if you consider annual rainfall 2015 saw 92 per cent of average rainfall recorded; 2016 was 93 per cent – placing 58th and 66th in driest years since 1797. Nothing out of the ordinary.
“2016-17 has, however, been an especially dry period with below average rainfall since Spring 2016.”
Wrong. See above detail. There have been three drier periods since 1981. And since March 2016, only half of the months have been notably dry, a period that included the third wettest June since 1797.
“January to March 2017 has seen roughly 50% less rainfall than average”
Wrong. January to March rainfall was 94% of the 1981-2010 average
April has been dry, and could be among the top 5 driest back to 1797, but it seems the Corporation are trying to blame nature instead of years of neglect on their part.
The situation is in stark contrast to CoL’s other open space, Hampstead Heath, which has recently seen the completion of a £23m project to make safe the ponds there. CoL has deep pockets yet they have dithered for years over spending £25,000 to renovate the Coronation Bridge – and offer the people of Ilford a route into the park.
Figures released by CoL show it has only invested £1.23m in Wanstead Park over the last five years, compared with £50m spent in Hampstead Heath.
We are constantly told that problems in the park are ‘in hand’ yet progress on anything is painfully slow – and action to repair the pump has sadly come too late for much of the wildlife on Heronry Pond.
People from far and wide use Wanstead Park – they really deserve better!
Wanstead Meteo 
People can and do blame just about anything on climate change, including unseasonably cold weather, so this fits a convenient pattern. BTW looks like your diesel scrappage scheme is looking more likely:-)
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I’m responding to this article 10 years later so not sure if anyone reads it.
I grew up near Wood St station in Walthamstow, and regularly played along the stream running from the Waterworks on Woodford Rd, which ran to Rising Sun pond, Eagle pond, Hollow ponds, ponds in Wanstead park, and then to the Roding.
After a period away from London I returned mid 70s, to find all these water courses in a sorry state – the long established stream fed by water from the Water works had been ‘switched off’ at the time of major road works at Waterworks corner. When I wrote to Corporation of London (CoLC) I was informed a ‘leak’ had been dealt with. This was no leak, probably pre dating the Waterworks itself.
All explanations I have seen from CoLC fail to address this fundamental cause of the degraded watercourses.
alan cooper
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