Stage-0 River Restoration at Wild Woodbury

Stage-0 River Restoration at Wild Woodbury

Six weeks on from the start of the river restoration work at Wild Woodbury, and the landscape has started to transform dramatically. Wetlands have started to form creating suitable habitat for species to return, such as lapwing and common snipe.

When I first walked around Wild Woodbury it was clear to see it was a heavily altered landscape. Missing hedges, bright green fields, and large ditches all pointed towards an intensively managed agricultural past – something which isn’t usually conducive to a biodiverse-rich setting. The ditches were startling, with many being over two metres deep and bordering almost every field margin, forcing any water on the land to be quickly washed away into a nearby river. These highly managed and canalised systems are now commonplace across the UK, drying our land out, whilst forcing nutrient rich waters into our rivers and seas, decimating wildlife along the way.

A major part of rewilding is the restoration of natural processes, which for us at Wild Woodbury means a site-wide project to restore the waterways across the 420-acres of land. Much of the site is fed by three springs and should naturally be very wet, encompassing several fields and a wet woodland, but the ditches have made this not so. To undo this previous management, we are carrying out a process called Stage-0 River Restoration. To begin with, this is very simply pushing the water out of the ditches and letting it flow over the land, letting it find its own pathways and naturally re-establishing historic routes across the fields. We estimate this will create 100-acres of wetter land, but in what form we are not yet sure – it could be standing water, marshy areas, meanders… One of the exciting parts of this work is watching and being surprised by what happens.

Before we started filling in ditches, we commissioned a hydrologist to survey Wild Woodbury for us, mapping the historic flow paths, monitoring the amount of water travelling through site and creating a plan of where would be most effective to block ditches and spill water back into the landscape. The filling in process has been rather straightforward, with one digger on site for a few weeks pushing material into the ditches in these specified locations, before we supplemented this work by creating leaky dams throughout the remaining ditch systems. Leaky dams, the well-known structure built by beavers, would be in every waterway throughout the country were it not for their extinction caused by over-hunting in the 16th Century, but as we wait for their welcome comeback to spread, we are being human beavers and creating dams ourselves. The idea of a leaky dam is to hold back a large proportion of water, but let some slowly move through the dam, to create a wetland system which is much more resilient to drought, filters excess nutrients out of water, and helps alleviate flash flooding downstream.

Seb Haggett / Visiting the leaky dams at Wild Woodbury

The effect of this restoration has been both immediate and incredible to witness. Several once dry and cracked fields have been transformed into large pools, flowing water, and delta-esque areas. The sheer amount of water that is now being held on site, that would have before been rushed off into Poole Harbour, is immense, and is already changing Wild Woodbury into a much more heterogeneous site, providing habitats and space for biodiversity and bioabundance to increase.

During our baseline ecological surveys over the past year, it has become obvious that the species we are lacking at Wild Woodbury are the ones that need water to survive and breed. Dragonfly and damselfly abundance has been low, amphibian numbers were in single figures, and aquatic invertebrates are practically non-existent. Historic field names such as peewit have alluded us to what once would have been common across the land, and incredibly, we have already seen some species return just six weeks on from our restoration starting. A recent survey produced 56 lapwing, nine golden plover and 30 common snipes in a single field at Wild Woodbury - hopefully a sign of things to come as we welcome back other flora and fauna that will benefit from the restored wetter landscape.