01
Front
What is a drainage basin?
Back
A drainage basin is the land area from which water drains to a particular outlet.
Free Online Flashcard Deck
3 Drainage Basins and Runoff Free Online FlashCards
Study 3 Drainage Basins and Runoff with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.
12 cards
02
Front
Why can a stream’s groundwater-contributing area differ from its surface basin?
Back
Groundwater does not always follow surface topography, so the area contributing groundwater to a stream can differ from its surface-water basin.
03
Front
What are headwaters?
Back
Headwaters are the small upstream streams at the beginning of a stream network.
04
Front
What is runoff?
Back
Runoff is precipitation that moves across the land surface or through shallow pathways toward streams.
05
Front
What does peak flow mean on a streamflow hydrograph?
Back
Peak flow is the highest streamflow during an event.
06
Front
How can lakes and wetlands affect water moving through a basin?
Back
Lakes, wetlands, reservoirs, and depressions can temporarily hold water and delay its movement downstream.
07
Front
What separates neighboring drainage basins?
Back
A drainage divide is the boundary between neighboring basins. It commonly follows high ground, such as ridges and hills.
08
Front
What is a basin’s drainage area?
Back
The drainage area is the land enclosed by a basin’s divide.
09
Front
What is a tributary?
Back
A tributary is a smaller stream that joins a larger stream.
10
Front
What is a confluence?
Back
A confluence is the point where streams meet.
11
Front
How is drainage density calculated?
Back
Drainage density is the total length of channels divided by basin area: Dd=AL.
12
Front
What is lag time in basin response?
Back
Lag time is the delay between the rainfall peak and the streamflow peak.
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