Why is Canvey Lake experiencing water quality issues?
Canvey Lake was created as a flood management feature and is fed by rainwater and surface water run-off rather than natural underground water sources.
Parts of the Lake are very shallow, which means the water warms up quickly during hot weather. Warm water holds less oxygen, making conditions more difficult for fish and other wildlife. Water quality is also affected by the large number of birds using the Lake, as their droppings add nutrients to the water. The Lake also has limited shade and relatively few plants that help produce oxygen.
Why are you not relocating fish immediately?
Fish cannot be safely relocated during the warmer months. This is normally carried out between September and March when water temperatures are lower. Our aquatic specialists are working to secure the necessary approvals so the work can take place at the appropriate time later this year.
Fish will need to be removed before any dredging work can begin. This is a regulated activity and requires approval from the Environment Agency.
Before fish can be moved, checks must be carried out to ensure they can be safely captured, transported and relocated. The health of the fish population must also be assessed to prevent diseases being spread to other water bodies.
Will you be adding more aerators?
Yes, if possible.
We would like to install additional aerators along the length of the Lake. However, some areas, particularly towards Oyster Fleet, are currently too shallow for them to work effectively.
Planned desilting work will help increase water depth in some locations, which may allow more aerators to be installed in future. We are also exploring options to provide power along the length of the Lake so that additional aerators can be added when conditions allow.
Why can't dredging start immediately?
Dredging cannot begin until the necessary approvals have been obtained from the Environment Agency. This includes a Flood Risk Activity Permit (FRAP).
Before applying for the permit, we need to understand exactly what material has built up and how it can be safely removed and managed. We are currently carrying out surveys and investigations with our aquatic specialists to gather this information.
The results will help shape both the dredging plans and the permit application before any work can start.