Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

39 Cards in this Set

  • Front
  • Back
Hydrological cycle
Powered by energy from sun
Water soaks into the ground slowly moving downward, finally seeping into lakes, streams, and oceans
Surplus flows from surface
Plants give off water to atmosphere
Evaporation and transpiration
Most important agent sculpturing Earth's land surface
Land that contributes water to river system
Drainage basin
Drainage basin of one stream separated from another. Imaginary line
3 Roles of Rivers and Streams
1. Erode channels in which they flow
2. Transport sediments provided by weathering and slope processes
3. Produce wide variety of erosional and depositional land forms
3 River system parts
1. Zone of erosion
2. Zone of sediment transport
3. Zone of sediment deposition
Transports sediments between zone of erosion and deposition
Trunk stream
Water flows in 2 ways
1. Laminar flow
2. Turbulent flow
Stream Velocity determined by
1. Gradient
2. Shape, size, roughness of channel
3. Discharge
Volume of water flowing past a certain point in a given unit of time
width x depth x velocity
m x m x m/s=
Streams that exhibit flow only during wet periods
Streams that exhibit flow in arid climates, only after heavy trainstorm
Most important erosional agent
Stream load consists of material
1. in solution -disolved load
2. in suspension
3. sliding or rolling along the bottom- bed load
Max size of particles capable of being transported
Max load a stream can carry
Material deposited by a stream
Streams actively cutting into solid rock
Bedrock channels
Bed and banks composed maily of unconsolidated sediment
Alluvial channel
Factors affecting alluvial stream shape
1. size of sedimet
2. channel gradient
3. discharge
2 types of alluvial streams
1. meandering
2. braided
Lower limit to how deep a stream can erode
base level
2 types of base levels
1. ultimate base level
2. temp/local base level
Sides of valleys shaped by
1. weathering
2. overland flows
3. mass wasting
2 types of stream valleys
1. narrow V valley
2. wide valleys with flat floors
Valley deepening caused by
1. bedload sliding and rolling
2. hydraulic power of fast moving water
sand and gravel deposits
depositional land forms with longer life spans
natural levees
alluvial fans
tributary stream that can't enter until it breaches levee
yazoo tributary
area behind levve that is poorly drained
most common drainge patter
most common and most destructive of all geologic hazards
Types of floods
1. regional
2. flash floods
3. ice jams
4. dam failure
Flood control
1. artifical levees
2. building of flood control dams
3. river channelization
4. artificial cut offs
5. nonstructural