North and South Streams Peat Restoration Project

Why is Peat Important?

England’s peat deposits are one of our most valuable national assets.
They’re our largest carbon store, they filter most of our fresh water
and help defend communities against flooding, and they’re home to
irreplaceable plants and wildlife.

Kents Lowland Peat

Kent is a very water-stressed county, with East Kent particularly affected.
The North & South Streams at Northbourne, near Deal, are part of a
Chalk Stream system, fed by groundwater springs and run-off from
surrounding farmland. These streams pass through a 168-hectare area of
deep lowland peat, historically known as ‘Brooklands’. The project area,
part of this historically significant fenland, has been subject to centuries
of drainage, intensive agriculture, and local coal mining, leading to substantial
peat shrinkage and loss of wetland habitats.

North and South Streams before works

Project

Kentish Stour Countryside Partnership worked with the River Stour
Internal Drainage Board https://rsidb.org.uk/ to raise and retain
local water levels to prevent further peat degradation, reduce CO₂
emissions and enhance local biodiversity. This project was funded
through  Lowland Agricultural Peat Small Infrastructure Pilot (LAPSIP)
grant scheme will deliver projects by internal drainage boards (IDBs)
to install new small-scale water level management infrastructure and
monitoring technology within drainage districts containing lowland
peat.

Key Objectives

The primary objectives of the project were:

1. Peat Protection: To prevent further drying and degradation of the
peat by raising and retaining water levels, particularly during dry periods.
2. Biodiversity Enhancement: To create and enhance wetland habitats,
benefiting local flora and fauna, including rare species such as water voles
and beavers.
3. Carbon Emission Reduction: To reduce CO₂ emissions by rewetting the
peat, thereby preventing the release of stored carbon.
4. Flood Risk Management: To improve water retention in the landscape,
benefitting upstream use whilst reducing downstream flood risk during
periods of high rainfall.
5. Demonstration Site: To create a model for future peatland restoration
projects in Kent and beyond, showcasing the effectiveness of low-cost
interventions

Actions

Main stop structures were installed on the North & South Streams at the downstream
end of the site.

A new feed structure was installed, designed to transfer water from the higher level
South Stream to the North Stream via the central channel, which was most likely the
original watercourse through the site.

Six large woody dams were installed in the
main channels; three in the North Stream and three in Broad Dyke.

Two smaller woody dams and one faggot dam were installed in the central drainage
channel by the Kentish Stour Countryside Partnership’s volunteer group.

Stop Sluice, Downstream

  South Stream Stop Structure

Broad Dyke, South Stream and North Stream showing Large Woody Dams creating higher summer flows

Broad Dyke Large Woody Dams in place holding summer waters high.

Broad Dyke Large Woody Dams

Broad Dyke Large Woody Dams

Volunteers putting small woody dams together

Volunteers build a small woody dam