River Mardyke

This section lies between a busy road bridge over Tank Hill Road to the West and a railway bridge to the East. It is a relatively short stretch of river through a fairly industrialised area, but is adjacent to areas with high wildlife potential. One bank has recently been planted with trees and a reedbed created.

The area (land use)

The dominant land use for this stretch of river is scrub.

No livestock were recorded.

Channel characteristics

The river channel consists of mainly silt, and riffles are absent.

At the time of recording the flow of water was sluggish and the channel was 5-10m wide and 1-2m in depth.

For most of this stretch the channel profile is variable.

Bankside trees were frequent, marginal plants and in-channel plants are occasional. Woody debris was noted to be rare.


The channel has been straightened and man-made enhancements are present along this stretch of river.

Field drains were recorded as absent and barriers / culverts are absent.


Areas of trampling / poaching were absent and areas of erosion were absent at the time of the survey.


Kingfishers, Wrens and Mallards were seen during the survey as were various butterflies and bumblebees. Also seen were marsh frogs, which are an invasive species common in the Mardyke.

Additional Information

The channel has been straightened and reprofiled in the past. The banks are not reinforced, allowing connections to develop between the bank and in channel environments. Man-made enhancements include a road bridge and a railway bridge.


River Mardyke

Date completed


Upstream Grid ref (red marker)


Downstream Grid ref (green marker)


Website key stakeholders:

Environment Agency logo      Essex Wildlife Trust logo           

Design by LTD Design Consultants and build by Garganey Consulting based on an original concept by Herts and Middlesex Wildlife Trust