Visit of British Dragonfly Society, Sussex group – 11th Nov 2012

The sun shone and we saw dragonflies (Common darter) despite it being November – the original aim was to look at habitat management so the sighting was a real bonus. A walk to the site stimulated much debate. Comments from group included:

“Many thanks for a very informative and enjoyable morning. The site promises to be a fantastic resource. We’re very glad we live nearby!”

“Could consideration be given to the deposition of gravel to allow breeding by sea trout? This is what the Ouse and Adur River Trust have been doing elsewhere with some success.”

“My children & I all enjoyed the presentations and I was very interested in the proposals for reintroducing 2 of the 3 meanders in the meadow …. I support the plan to reintroduce the meanders and look forward to helping to monitor the resulting changes in flora within the meadow.”

What comes out of our river?

Aside

What comes out of our river?

On 2 November 2012 members of the project team visited South East Water Treatment works at Barcombe to see first hand how much sediment needs to come out of the River Ouse as part of the water treatment process. Sediment gets into rivers through rainfall which runs off the land and stays in the river until Barcombe. This pile of sediment is how much comes out of the river over a 1-2 day period. This all has to be transported back up the catchment to go back on the land.

sediment pile

The potential of re-connecting the meanders at Sheffield Park would help to slow the flow increasing flooding across the floodplain helping to reduce the sediment load in the river.

Other projects are in progress to try to reduce the amount of sediment getting into the river.

Compressed soil block: soil that has come out of the river is compressed and taken back up the catchment

Compressed soil block: soil that has come out of the river is compressed and taken back up the catchment

Tree planting on the floodplain

Aside

Tree planting on the floodplain

Back in December 2010 the National Trust, Environment Agency and Sussex Wildlife Trust spent the day planting trees on the floodplain of the Ouse. Around 0.5 Ha of mixed floodplain woodland trees including Black poplars were planted at Spring Farm by Sheffield Park to create this rare and rapidly declining habitat. The creation of the woodland will help reduce flooding downstream by reducing water flows and increasing water storage areas on the flood plain.