The fuss in the papers is all about the discharge of sewage into rivers and lakes by the water companies. However, according to our speakers, the problem with agriculture is just as great and a good deal easier to solve. They concentrated on filtering runoff from farmers' fields and 'natural' solutions. These include retaining as much water as possible in the upper reaches of rivers and controlling the flow down the river. Maintaining a regular flow makes it much easier to control quality. They did not want to see water courses being straightened out. Rather put back the bends and water meadows so that water is retained.
They agreed that the works required to reduce pollution from sewage would be huge. Massive retention tanks to contain the flood water until it can be released in a controlled manner. Dividing the sewers in old established parts of cities and towns to separate the foul from the storm. Ideally the storm water (rain) should be disposed of in soakaways. The mind boggles at the scale of the works required.
All-in-all, a thought provoking problem currenly excerbated by recent sudden heavy rainfall storms which, with the current rate of global warming, is only going to get worse!
Many thanks to Jonathan B for this report,
Following footnote on our speakers provided by Tony R.
Michelle Walker is Technical Director at The Rivers Trust leading a team of geospatial data specialists who support the network of 65 member Rivers Trusts across the UK and Ireland to take an evidence-based approach to planning, collaborating and delivering measures to improve the health of rivers across the UK and Ireland. She is a geospatial data specialist with 30 years experience, based in North Somerset and in her spare time she is a keen outdoor swimmer and volunteers for Bristol Avon Rivers Trust on education and citizen science activities.
Simon Hunter is the CEO of Bristol Avon Rivers Trust (BART), dedicated to enhancing the health and resilience of rivers across the Bristol Avon catchment. With a focus on river and floodplain conservation, sustainable water management, and community engagement, Simon leads efforts to restore and protect these vital ecosystems. Outside of work, Simon is a keen paddleboarder and surfer, and enjoys spending time in nature.