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Stream Drainage Patterns Start by reading the first page of the notes!

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Presentation on theme: "Stream Drainage Patterns Start by reading the first page of the notes!"— Presentation transcript:

1

2 Stream Drainage Patterns

3 Start by reading the first page of the notes!

4 THE BEDROCK OF IN AN AREA WILL CAUSE STREAMS TO DRAIN IN A PATTERN

5 THAT CAN BE SEEN FROM OVER-HEAD (airplane). THESE ARE CALLED

6 Mississippi River Delta

7 C.

8 Match the geologic structures below To the drainage patterns they would create.

9 THIS OCCURS WHEN: Rock resistance is all similar

10 Like the veins in a leaf Horizontal rock layers Most common

11 WATER FLOWS DOWN HILL FOLLOWING THE PATH OF LEAST RESISTANCE

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13 C. THIS OCCURS IN THE AREA OF A STRUCTURAL DOME WATER FLOWS IN THE PATH OF LEAST RESISTANCE with rock layers of variable resistance surrounding the center of the dome

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15 FOLLOWING THE PATH OF LEAST RESISTANCE

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17 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)

18 THE 3 STAGES OF LANDSCAPE MATURITY :

19 1.MUCH OF THE LAND AT HIGH ELEVATIONS 2. STEEP HILL SLOPES 3. FAST STREAMS 4. DEEP V-SHAPED VALLEYS

20 1. ROUNDED HILL SLOPES (IF MOIST CLIMATE) 2. STREAM VALLEYS ARE BROAD 3. STREAMS BEGIN TO MEANDER

21 1. MOSTLY ERODED TO BASE LEVEL 2. STREAMS HAVE LOW SLOPE (GRADIENT) 3. STREAMS MOVE SLOW & MEANDER 4. FERTILE AND THICK SOIL HORIZON A

22 CAN CAUSE OLD LANDSCAPES TO BE REJUVINATED BACK TO YOUNG AGAIN UPLIFT

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25 ENVIRONMENTAL PLANNING AND CONSERVATION CAN HELP TO PRESERVE OUR SOIL,WATER, AND AIR

26 Notice how the rock types weather differently Which rock is least resistant? shale Differences in rock resistance creates varied and interesting landscapes.

27 THE INFLUENCE OF CLIMATE ON LANDSCAPE: Humid (moist)Arrid (dry) Slope Soil Type of Weathering gentle Fertile Thick A layer Chemical due to Increased amount Of moisture steep rocky Physical due to abrasion


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