Essex Rivers Hub

Bourne 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

Floating Pennywort has been most recently recorded on this water body in 2009. Floating Pennywort covers the surface of the river, blocking out natural light and causing the plants below to die. The dead plants then rot down, removing the oxygen from the river. Floating Pennywort also causes trouble for boats, making the river very difficult to navigate.

Eradication of floating pennywort can only be successful through spraying. It spreads very quickly and just small live fragments can allow it to take hold again. If you see this plant species then please alert us as soon as possible.

 

Signal Crayfish have been most recently recorded on this water body in 2007 and 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.

 

Bourne Brook is modified, with evidence of channel modification at Letche's Farm, Bourne Brook Bridge, Gosfield Bridge, Gosfield Lake, Slotslough Bridge and Hedingham Road. The effect of this modification has not yet been determined.

Investigate the effect of physical modification on this water body.

Bourne Brook is classified as poor for phosphates. Extensive sampling has showed that the majority of the length of the river is suffering from increased phosphate levels, indicating that phosphate loading is sustained across the whole water body. One of the larger sources of phosphate input is likely to be the local sewage treatment works. It is also suspected that there is intermittent point source discharge from other sectors. Higher phosphate levels are likely to be the cause of this water body failing for invertebrates.

Work with the water company to introduce phosphate stripping in at least one of the sewage treatment works along this waterbody.

Bourne Brook is classified as poor for phosphates. Extensive sampling has showed that the majority of the length of the river is suffering from increased phosphate levels, indicating that phosphate loading is sustained across the whole water body. Therefore it is likely that diffuse agricultural pollution is contributing to this phosphate loading. Higher phosphate levels are likely to be the cause of this water body failing for invertebrates.

Work with landowners to reduce pollution from agriculture.

Where necessary, carry out farm visits.

 

  

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