By Lawrence Hemmings, our River Restoration Volunteer
After a great deal of planning by Luke the habitat improvement works on the Ravensbury Park Back Channel have begun with the help of our contractors – Ru and Jack of AquaMaintain. The digger and dumper have arrived as have the hazel faggot bundles posts, not forgetting the loathsome pile driver (a 20 kg hammering tool essential for river habitat work). And without further ado splash! Work could commence.
In order to create a more biodiverse, naturally functioning river, complete with runs, glides, pools and riffles, the Ravensbury Channel needs a little encouragement. By securing the faggot bundles in an irregular zig-zag on both sides of the river, the variation in flow will scour out deeper pools, form riffles, and, with any luck, some gravels will appear – perfect spawning grounds for amorous fish!
So Luke, Jack and I splashed into the river with our trusty pile driver at the ready. We pinioned hazel faggot bundles in place by hammering in stakes on both sides, and a new bank line quickly started to appear.
Meanwhile our adept digger driver Ru set about clearing the brush from the park-side bank of the river where we have removed the toeboarding, sheet piling and other bank reinforcements. In no time at all Ru had begun re-grading the steep-sided river banks, which will allow us to connect the river to its natural soil bank. The bank can then be planted with typical marginal plants, such as sedges and reeds, creating a continuum from aquatic to terrestrial habitat. We will also be digging a small back water, where the slack flows will allow fish fry to seek refuge away from the perils of the fast lane – the new turbulent Back Channel.
Stay tuned for more updates!