5.13. (9/25) Plot and Interpret W-Q Data Flashcards
what did we find at Saucon creek?
paved with a layer of gravel (class supported)
what happened when the gravel pebbles of Saucon Creek were moved?
mix of sand and gravel (sometimes matrix supported by sand)
what is d50 armored?
gravel pavement/armor
- gravel is lining the channel
what can we find in the channel part of a river?
coarse material
what can we find in the floodplain part of a river?
underlain by mud
what is suspended load?
as long as water is flowing; mud stays in suspension; flowing water can essentially “float” objects
*mud and silt
What is the bedload?
The leftover heavy stuff
*sand and gravel
why can we find mud in floodplains? what form do they take on?
- water stops flowing when water comes out of the channel and settles out
- vertical structure
*behaves like a lake
What form do bedloads take on? how are they built?
- laterally
- sediment is shaped by the horizontal movement of water
how are things settled in the floodplain versus bedload?
vertically vs horizontally
How do levees form? what has nature designed them to do?
- velocity goes to zero when water spills over to bankfull and sediment falls out right next to the channel causing the beginning of a floodplain to be higher
- hold water during big rainstorms
why do people build levees?
to prevent houses on floodplain from flooding
- to keep channel from flooding onto floodplain
how do we measure bankfull depth?
tape to water + water to bottom
what is baseflow?
equation 1a
Q=UA
