Key term for Edexcel GCSE Geography A, used in Fieldwork Investigations.
The total area of water in a river channel cross-section, calculated by multiplying the width by the mean depth.
Cross-sectional area (CSA) 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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