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Although chalk streams are generally watercourses originating from chalk hills, including winterbournes, streams, and rivers, the term chalk stream is used even for larger rivers, which would normally be considered too large for the term stream. The Somme in northern France is a chalk stream on a larger scale.
It is one of only 210 chalk streams in the world, which are often sometimes described as "England’s rainforests" due to their importance to wildlife, according to the Local Democracy Reporting ...
A dry valley may develop on many kinds of permeable rock, such as limestone, chalk, sand stone and sandy terrains that do not regularly sustain surface water flow. Such valleys do not hold surface water because it sinks into the permeable bedrock. There are many examples of chalk dry valleys along the North and South Downs in Southern England.
The word bourne derives from the Anglo-Saxon word for a stream. [1] It is an unnavigable tributary of the River Gade, which flows into the River Colne, which in turn is a tributary of the River Thames. The Bulbourne is an example of a chalk stream, which is a watercourse that flows from chalk-fed groundwater. Chalk streams are a very rare ...
Works have begun on a 2.5km (1.5 miles) stretch of river to restore its ecosystem back to its original state. A revitalising programme has started on the River Ver, which is a rare chalk stream ...
Action by Wildlife Trusts to protect habitats in the face of climate change comes as the network of charities warns of risks to its reserves.
A bourne is an intermittent stream, flowing from a spring. Frequent in chalk and limestone country where the rock becomes saturated with winter rain, that slowly drains away until the rock becomes dry, when the stream ceases. [1] The word is from the Anglo-Saxon language of England.
The River Chess is a chalk stream that rises near Chesham in the Chiltern Hills, and flows for 11 miles (18 km) through Buckinghamshire and Hertfordshire to its confluence with the River Colne in Rickmansworth. The Chess, along with the Colne and Gade, gives rise to the name of the district of Three Rivers.