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when the rate of rain fall exceeds earths ability to absorb it, the surplus water flows over the surface into lakes and streams
when water that infiltrated the ground surface is absorbed by plants, which then release it into the atmosphere
when we can not distinguish between the amount of water that is evaporated and the amount that is transpired by plants
imaginary line seperating the drainage basin of one stream from the drainage basin of another
very slow moving streams that flow in roughly straight paths that parallel the stream channel (opposite of turbulent flow)
the slope of a stream expressed as the vertical drop of a stream over a specified distance.
a cross-sectioned view of a stream from its source area (head) to the mouth. (point downstream where the stream emptys into another body of water)
the material deposited by a stream (occurs when material sinks or stops moving because the velocity is too low)
showing a inter-woven appearance (form where large portion of the stream load consists of coarse material and the stream has a highly variable discharge)
lower limit to how deep a stream can erode (commonly occur where the stream enters another body of water)
(temporary) local base levels
lakes, resistant layers of rock, and main streams that act as a base level for their tributeries
feature when a river comes out of a mountain and drops onto a valley floor (contain braided streams)
smaller channels that divide off of the main channel and carry water away from the main channel.
tributary streams that can not enter a river because of levees blocking the way. (flow parallel to river until they enter the main river later on)
river pattern when streams diverge from a central area like spokes from a hub of a tire (typically develops on isolated volcanic cones and dominal uplifts)
river pattern in which many right angle bends can be seen. Develops where bedrock faults or criss cross of series of joints
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