Know how the mouth, head, and base level of a stream are spatially related to the stream’s longitudinal profile.
Head: top, steep Mouth: bottom, more level
Know what will happen if a portion of the land a stream runs through should rise above, or fall below the longitudinal profile.
Land uplift: creates cliffs (waterfalls) and benches (rapids) Land Sink: stream will deposit up
Besides vertical movement of the land, why else might a stream have to adjust to a new longitudinal profile?
Change in the base level. Ex: dam
Know the difference between a young, middle aged, and old aged stream.
Young: straight, steep slopes Mid aged: curvy, small flood plains Old: winding/hairpin turns, large flood plains
Be able to identify the following on a diagram: flood plain, cut bank, point bar, oxbow lake, meander scar, yazoo stream/tributary, terrace, and levee.
Flood plain: flat land on either side of the stream Cut bank: cut by outside current of stream Point bar: land, opposite cut bank Oxbow lake: horseshoe shaped lake Meander scar: dried up oxbow lake Yazoo stream: small stream in flood plain, runs alongside main stream Terrace:a step-like landform that borders a stream flood plain Levee:sediment built up at end caused by flooding and reflooding
Know the definitions of a watershed (drainage basin) and a drainage divide.
Watershed:area of land that deposits water to a stream segment Drainage divide:high land that separates two watersheds
Know the difference between stream capacity and stream competence. Know what happens to a stream if its sediment load is greater than its capacity.
Stream capacity: total discharge of sediment the stream is transporting Stream competence: largest sized particle being moved by the stream (bed load) If sediment load is greater than capacity: flood
What is the name of the sediment feature created by a mountain stream that discharges onto a relatively flat plain?
What is the name of the sediment feature created by a stream discharging into a larger body of water?
Know the definition of, and how to calculate, stream discharge.
Q=wdv discharge=width times average depth times average velocity
Know what a hydrograph is. Know what is plotted on the x-axis and what is plotted on the y-axis.
x axis: time y axis: discharge
Know the definition of stream stage, and what a graph relating stage to discharge is called.
height of the stream Rating Curve relates stage to discharge
Know what is meant by flood probability and flood recurrence interval. Understand the statistical nature of these two things.