HUC
what is HUC?
patterns of rivers, streams and rills organized by stream order, number and length.
What are drainage networks?
This is a factor of the result of the channel geometry equations that are empirically derived.
What is estimated/ not exact?
Width to depth ratio, entrenchment ration, slope, sinuosity, meander with ratio are all examples of this.
What are identification parameters?
Channelization, urbanization, overgrazing, bank stabilization and more.
What are causes of stream restoration?
This is the government department that created the Hydrologic unit code numbering system for drainage basins in the 1970s
What is the USGS?
One orders the stream by longest tributary the other has not headwater extension
what are the stream ordering systems?
Some examples are Stream width, stream depth and average volume.
What are hydraulic geometry factors?
This man modified the stream classification method and visited Arkansas last semester to talk about nature-based solutions.
Who is David Rosgen?
This is the natural sine curvature of rivers and streams
What is meandering?
A longer HUC code indicates
What is a smaller watershed area?
The mathematical relationship of the stream length/area VS/ stream order.
What is logarithmic?
The breakpoint between channel formation and floodplain processes. this also has the greatest effect on channel formation and maintenance long term.
What is bankfull discharge?
This measurement shows the energy level and stability of the stream and is the ratio of bank width to mean bank fall depth at this point in a stream.
What is a stable riffle?
This is the hardest thing about stream restoration (subjectively).
What are natural changes?
This is the maximum number of digits a HUC can be
What is 12?
This stream ordering system is more widely used than its confusing predecessor and uses a more numerical approach.
What is Strahler method?
The balance of stream flow and slope against sediment discharge and size.
What is the channel equilibrium?
This channel pattern has a slope below the threshold.
What is meandering streams?
Weir, vane, boulders, J hooks and trees are all examples of in-stream solutions that have this result on the stream.
What is slow velocity/ break up flow?
What is a cataloging unit?
The quantitively relationship of stream segments, normally 3.2 to 3.5, in the strahler method
What is the Bifurcation ratio?
This is the definition of entrenchment ratio with units of length per length/
What is floodplain width/ Bank fall width?
This stream type is a result of current of past erosion and has a W/D ratio of > 40
What is D or braided streams?
This is what is the hardest part about stream restoration (objectively) because it keeps the bank position constant and in a permanent location.
What are Road crossings?