Essex Rivers Hub

Salary Brook Pressures

The table below shows the current pressures that this waterbody faces and the solutions that could be put in place to solve these problems. You can learn more about some of these pressures and solutions on the Environment Agency Catchment Data Explorer or you can contact us to find out more.

PRESSURES

SOLUTIONS

Japanese Knotweed has been most recently recorded on this water body in 2008. This plant not only shades out native plants, but also causes serious damage to buildings.

 

Japanese Knotweed can be removed by spraying or injecting its roots with pesticides, this takes time to kill the plant, but it is effective. Just digging up this plant is, unfortunately, not enough.

 

Phosphate levels within the water body are high resulting in a classification of poor.

Investigate sources of pollution and take action to address these.

The tidal sluice is not impacting passage but more recent dam boards are a possible an impact. There is also a culvert under the A120 that is likely to be acting as a barrier to fish passage due to its design.

Fish populations are classified as poor and restrictions to migration are having an impact. In addition sediment (local issue) and sewage discharges are also causing fish populations to remain low.

Investigate causes of failure and how any barriers can be modified.

Flows are low and also impacted by seasonal patterns.

 

Ensure abstraction levels are not impacting on aquatic species.

Also take into account seasonal patterns of water levels and manage effectively to ensure aquatic species are not impacted

 

 

New Zealand Pigmy Weed has been most recently recorded on this water body in 2008. This plant forms dense mats in waterways, increasing the likelihood of flooding and also out-competing native species.

This plant can be mechanically removed, but this would only be a short term solution. Chemical eradication is possible and if done correctly can be very effective. After eradication it is important to monitor sites to ensure that it does not take hold again.

 

Phosphate levels within the water body are high leading to a classification of poor. Sources have not yet been determined but sewage discharges (from water industry and private properties) are likely to be having an impact.

Determine if sewage discharges are having an impact and take action to correct this.

Signal Crayfish have been most recently recorded on this water body in 2014. Signal Crayfish cause changes to the natural bankside habitat and also out-compete our native crayfish. They are fierce predators and can completely change fish and invertebrate communities so that they are no longer in their natural state.

There is currently no known solution to the invasion of Signal Crayfish, regular monitoring is needed to ensure a strategic approach when a solution has been identified.

 

Turkish Crayfish have been most recently recorded on this water body in 2008. Turkish Crayfish cause changes to the natural bankside habitat and also out-compete our native crayfish. They are fierce predators and can completely change fish and invertebrate communities so that they are no longer in their natural state.

There is currently no known solution to the invasion of Turkish Crayfish, regular monitoring is needed to ensure a strategic approach when a solution has been identified.

 

  

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