07 – The widened riverbed. A river with more space
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In this section, the riverbed has been widened to provide more space for the water, especially during floods. When a river has little room to expand, the water flows faster and the risk of flooding and damage increases. By widening the banks, the water can spread out laterally, slow down and dissipate its energy more safely.
But it is not just a matter of safety: a wider river also becomes a more vibrant environment. New spaces form, such as gravel bars, stretches of calm water, small wetlands and shallow areas ideal for wildlife. These areas provide shelter and breeding grounds for fish, amphibians, aquatic insects and many small invertebrates.
Vegetation also expands: willows, marsh grasses and shrubs capable of adapting to changes in water level grow. Their roots stabilise the banks and provide shade, nourishment and shelter for wildlife. These environments are constantly changing: the water alters the landscape, transports material, deposits sand and creates new forms. Every flood leaves its mark and helps to shape a more complex and dynamic habitat.
Did you know that…
A simple handful of gravel can harbour more life than the human eye can see?
Even if you can’t see them, tiny organisms live amongst the stones, purifying the water and nourishing the entire river food chain.
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Edipoda celeste Oedipoda caerulescens
Edipoda celeste Dettaglio ali
Effimera Baetis rhodani
Dragone alpino Aeshna juncea
Acero Acer opalus
Ontano bianco Alnus incana
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Nelle foto due esempi di anse realizzate. La larghezza del fiume è aumentata e l’acqua ha ritrovato i suoi spazi.