GEOG 150 Lecture Notes - Lecture 7: Headward Erosion, Drainage Divide, Distributary
2.8
What percentage of earths water is fresh?
stream
any body of water that flows along a channel
surface water
water that remains on the earths surface as puddles, swamps, lakes, snowfields, and glaciers
runoff
water that flows over the ground surface rather than soaking into the ground
erosion
the grinding away and removal of Earth's surface materials by moving water, air, or ice
headward erosion
the process by which a stream channel lengthens up its slope as the flow of water increases
tributary
a small stream that flows into a larger stream
drainage basin
It is an area of land in which all water that falls on that land flows into one river.
distributary
a branch of a river that does not return to the main stream after leaving it
drainage divide
the land that separates one drainage basin from another
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dentritic drainage
A drainage pattern whose shape resembles the pattern made by the branches of a tree or veins of a leaf
*most common drainage pattern
radial drainage
drainage networks forming on the surface of a cone shaped mountain flow outward from the mountain
peak
rectangular drainage
drainage networks forming where a rectangular grid of fractures breaks up the ground and streams join
each other at right angles
trellis drainage
drainage in places where a drainage network develops across a landscape of parallel valleys and ridges.
major tributaries flow down a valley and join a trunk stream the cuts across the ridges.
*most common in valley and ridge province
sediment load
The solid material that is transported by a natural agent, especially by a stream
dissolved load
Running water dissolves soluble minerals in the sediment or rock that it flows over, and groundwater
seeping into a stream brings dissolved minerals with it.
-in solution
suspended load
The load of a stream that usually consists of tiny solid grains (silt or clay sized) that swirl along the water
without settling to the floor of the channel
-in suspension
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Document Summary
A drainage pattern whose shape resembles the pattern made by the branches of a tree or veins of a leaf. *most common in valley and ridge province sediment load. The solid material that is transported by a natural agent, especially by a stream dissolved load. Running water dissolves soluble minerals in the sediment or rock that it flows over, and groundwater seeping into a stream brings dissolved minerals with it. The load of a stream that usually consists of tiny solid grains (silt or clay sized) that swirl along the water without settling to the floor of the channel. The load of a stream that consists of large particles that bounce or roll along the stream floor. Along bottom saltation the movement of sediment in which grains bounce along their substrate, knocking other grains into the water column in the process competence the maximum particle size a stream carries.
