shw[8-22] - flash floods ; infiltration vs runoff

Nice graphic explaining why flash flooding can occur when it rains heavily after a drought.
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As a gardener, I will sometimes lightly water certain areas when it has been hot and dry for a while and rain is forecast. [or I'm planning a proper watering session, I'll hoe & pre-water - just dampen - the surface, so that when I do the proper watering, it is more likely to soak in, rather than flow away over the surface].
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not my image ; fair use & public information