Environmental groups say the prolonged drought is seriously affecting riverine wildlife.
As pollution and drinking water are already putting pressure on the river, he says the impending drought is exacerbating the pressure.
And, according to the Rivers Trust, the chalk streams that support popular species like salmon, kingfisher and otter are of particular concern.
There are only 200 of them in the world, 85% of which are in the south and east of England.
“This is our barrier reef or the Amazon rainforest; this is our unique contribution to global wildlife and biodiversity,” said Christine Colvin of the Rivers Trust.
“Some of the smaller chalk streams are starting to dry up, while the larger rivers are seeing a decrease in flow,” she said.
He added that wildlife here is already under pressure from rising temperatures and shrinking habitat as water levels continue to fall. "We don't want them to fall as low as they are now."
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Jamie Marsh, director of the Hampshire and Isle of Wight White Wildlife Trust reserves, warned of a "painful situation" for wildlife as rivers dry up in parts of the region.
A pond in a nature reserve along the Eichen River in Winchester dried up completely when the lower river flows entered food sources for fish, insects and invertebrates, which had a domino effect for animals at the top of the chain. He fell. Food like water volleyball and otters.
“Our water resources are under great pressure and this prolonged drought is exacerbating the problem.
“What can we do to help us as a society look at our water consumption and try to reduce our consumption.
Many of our rivers are not in good condition; Significantly redesigned and redesigned. Many of our river systems are now more like estuaries than actual rivers."
Limestone rivers and streams rise from springs formed in limestone, a layer of spongy rock that underlies much of southern and eastern England and can hold large amounts of water.
This layer of white limestone is made up of the same material that makes up the white cliffs of Dover and supplies water to rivers and taps in much of the southeast of England.
Water is pumped from underground or taken directly from the river in millions of liters per day.
Southern Water, which supplies water to Hampshire and the Isle of Wight, said the decision to ban the hose was "an important step" to protect the habitat of the Test River and the Aichen River from which it draws its water.
River flow in July is 25 percent lower than expected, the company said.
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