I seems they are doing long term maintenance. The pools will be cleared of debris, some of the dead trees removed and undergrowth cleared back under the surrounding trees. Long term it will be an improvement but I miss the heron and the coots and the fish, which we are, bi-lingually, forbidden to catch.
This is a quick little sketch in my A6 pocket book. Here is a link to a photo of the view in summer time (use your back button to get back again)
Now the bright light is reflecting off shiny mud rather than water. The foliage will grow back.