Stream Drainage Patterns
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Transcript of Stream Drainage Patterns
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Stream DrainagePatterns
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Start by reading the first page of
the notes!
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THE BEDROCK OF IN AN AREA WILL CAUSE STREAMS TO DRAIN IN A
PATTERN
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THAT CAN BE SEEN FROMOVER-HEAD (airplane).THESE ARE CALLED
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Mississippi River Delta
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C.
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Match the geologic structures below
To the drainage patterns they would create.
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THIS OCCURS WHEN:
Rock resistance is all similar
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• Like the veins in a leaf
• Horizontal rock layers
• Most common
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WATER FLOWS DOWN HILLFOLLOWING THE PATH OF
LEAST RESISTANCE
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C.
THIS OCCURS IN THE AREA OF A STRUCTURAL DOME
WATER FLOWS IN THE PATH OFLEAST RESISTANCE
with rock layers of variable resistance surrounding the center of the dome
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FOLLOWING THE PATH OF LEAST RESISTANCE
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STAGES IN LANDSCAPE DEVELOPMENT:
THE MATURITY OF A LANDSCAPE DEPENDS UPON THE PORTION OF THE LAND THAT HAS BEEN WORN DOWN TO OR NEAR
BASE LEVEL (NOT SEA LEVEL)
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THE 3 STAGES OF LANDSCAPE MATURITY:
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1.MUCH OF THE LAND AT HIGH ELEVATIONS2. STEEP HILL SLOPES3. FAST STREAMS4. DEEP V-SHAPED VALLEYS
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1. ROUNDED HILL SLOPES (IF MOIST CLIMATE)
2. STREAM VALLEYS ARE BROAD3. STREAMS BEGIN TO MEANDER
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1. MOSTLY ERODED TO BASE LEVEL2. STREAMS HAVE LOW SLOPE (GRADIENT)
3. STREAMS MOVE SLOW & MEANDER4. FERTILE AND THICK SOIL HORIZON A
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CAN CAUSE OLD LANDSCAPES TO
BEREJUVINATED
BACK TOYOUNG AGAIN
UPLIFT
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ENVIRONMENTAL PLANNING AND CONSERVATION CAN HELP TO PRESERVE OUR
SOIL,WATER,AND AIR
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Notice how the rock types
weather differently
Which rock is least resistant?
shale
Differences in rock resistance creates varied
and interesting landscapes.
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THE INFLUENCE OF CLIMATE ON LANDSCAPE:
Humid (moist) Arrid (dry)Slope
Soil
Type ofWeathering
gentleFertileThick A layerChemical due to
Increased amount Of moisture
steep
rockyPhysical due to
abrasion