Geology - Rivers and Springs
Offered By: Earth and Space Sciences X via YouTube
Course Description
Overview
Syllabus
Surface Water
Distribution of Earth's Water
The Hydrologic Cycle
Drainage Basin (Watershed) • Drainage basins (Watersheds) - Astream drains an area of land called a drainage basin - The Imaginary line separating one basin from another is called a divide
Running Water - Rivers drain much of the land area
River Systems Sediment production • Zone where most sediment is derived . Located in the headwater region of a
Streamflow • Water moves in a river channel under the influence of gravity - Water slowly flowing in a nearly straight path is called laminar fow - Water moving quickly in an erratic fashion both horizontal and vertical movement is caled turbulent flow
Flow Velocity
Dissolved Load . Most of the dissolved load is brought to a stream via groundwater • Dissolved load is not affected by stream velocity - Dissolved minerals precipitate when water chemistry changes
Suspended Load • The largest part of a stream load is carried in suspension
Settling Velocity . Amount of material carried in suspension is controlled by stream velocity and setting velocity of sediments - Settling velocity is the speed at which a particle falls through a stilliquid 1000
Bed Load
Capacity and Competence - Capacity is the maximum load of solid particles a stream can carry - The greater the discharge, the creater the capacity • Competence is the maximum particle size a stream can transport -Streams with a faster velocity have a higher competence
Shaping Stream Valleys
Grand Canyon
Alluvial Fans Alluvial fans are fan-shaped deposits of sediments at the base of mountain
Taught by
Earth and Space Sciences X
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