Chalk streams, a type of nutrient-rich river found mostly in England, are under threat from pollution and over-exploitation. Fines paid by water firms will be used to restore these rivers, but it may take decades.
A plan to restore chalk streams in England, a vital type of river that plays host to species such as kingfishers, mayflies and dragonflies, may take decades despite millions of pounds worth of investment.
England is home to 85 per cent of the world’s chalk streams – rivers that rise from springs found on 60-million-year-old chalk bedrock and have particularly nutrient-rich water. Of the 220 chalk streams in England, only 17 per cent are in good ecological health, according to the Environment Agency, due to a range of issues such as physical modification, sewage overflow and agricultural pollution.
Chalk streams are commonly over-exploited because their pure water is easy to abstract for public water supply, says at advisory body Natural England. “If you’re a water company, this is a fantastic product.” he says. For example, Cambridge Water takes its entire water supply from chalk streams.To address damage to chalk streams, the UK government has launched a strategy that will see all of them designated as water stressed, meaning water firms must consider whether they should introduce compulsory water metering for their customers.
The strategy also makes chalk streams a high priority for river restoration schemes. Chalk streams, like the majority of rivers around the country, have been heavily modified. “Many have had gravel removed for building works and had weirs and mills put into them over time,”Get a dose of climate optimism delivered straight to your inbox every month.For the financial year between 2022 and 2023, there were 77 chalk stream projects funded at a total cost of £1.9 million in England.
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