Key term for Edexcel GCSE Geography A, used in Fieldwork Investigations.
The accumulation of fine-grained sediment on the riverbed, which reduces the cross-sectional area and increases flood risk.
Siltation appears in Edexcel GCSE Geography A revision content for Geographical Investigations: Fieldwork and UK Challenges, especially Fieldwork Investigations and Fieldwork: River Landscapes.
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