surface water Flashcards
what is the hydrologic cycle?
the transfer of water between the atmosphere, the ocean, lakes and streams and the crust (as groundwater)
what is a drainage system?
a network of channels
what is a stream?
any flowing body of water following a channel
what is a river?
a large stream
what is a watershed?
total area feeding water to a stream
what are the 4 drainage patterns?
dendritic
radial
trellis
rectangular
what is stream discharge?
the volume of water passing a point in a specific amount of time
what are the two types of flow?
laminar
turbulant
when does the amount of water in a water shed increase?
downstream
addition of tributaries
what is the thalwag?
The thalweg is the part of the stream that has the highest flow velocity.
what is the Hjulstrom Diagram?
shows the relationship between sediment size and the water’s ability to erode and transport sediments
what are the 3 types of streams?
straight
braided
meandering
what does fluvial sediment build?
alluvial fans
deltas
what does progradation mean?
less sediment build up further off coastline you go
what is avoided by looking after drainage systems?
pollution run off
anoxic dead zones
