Which of the following are an example of a physical (natural) cause of floods?, Heavy rainfall, Building on a floodplain, Impermeable surfaces such as tarmac, Saturated soil, What is it called when the soil is already full of water?, Impermeable, Infiltration, Saturated, Permeable, What are surfaces known as when they don;t allow water to soak in?, Impermeable, Permeable, Interception, Solid.

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