Social Sciences and History / Unit 10 SSH 0930 short lesson, about 20 seconds
Streams, Floods, Groundwater
Captions available
The idea
Streams are the most important agents of erosion and sediment transport. Floods come when precipitation exceeds what ground and channels can carry; flash floods follow brief heavy rain. Groundwater fills pore space; porosity is that share, primary between grains, secondary in fractures.
In practice
Most wells draw from within a hundred meters.
Where people slip
Marsh, swamp, bog: three wetlands.
Your place on the trail
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Unlocks
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