Chapter 9 and 10 Flashcards

1
Q

Drainage Basin

A

Area of land where all surface water converges to a single point or flows into another body of water.

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2
Q

Drainage Density

A

Channel length per unit watershed area.

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3
Q

Terrace

A

Flat or gently sloping geomorphic surface that is typically bounded on one side by a scarp.

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4
Q

Gorge

A

“Small canyon” formed by geological uplift, eroison, and glaciers melting.

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5
Q

Tarn

A

Lakes formed in glacially carved cirques.

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6
Q

Legacy Sediment

A

Depositional bodies of sediment inherited from the increase of human activities since the early settlers.

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7
Q

Sediment Rating Curve

A

Average relation between discharge and suspended sediment concentrations for a certain location.

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8
Q

River/Stream Capture

A

Stream is diverted from its own bed and flows into the bed of neighboring stream.

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9
Q

Emergent/submergent coastlines

A

Land along the coast that has been exposed by the sea fall. Submergent has been covered by sea rise.

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10
Q

Plunging Breaker

A

Breaking wave whose crest curls over and collapses suddenly

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11
Q

Swash/Backwash

A

Turbulent layer of water that washes up on the beach after and incoming wave breaks.

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12
Q

Longshore Drift

A

The transportation of sediment dependent on the angles of the waves coming in. The movement of sediment down the beach in a zigzag pattern.

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13
Q

Lagoon

A

Shallow body of water that is seperated from a larger body of water by a narrow landform like a barrier island.

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14
Q

Submarine Canyon

A

Formed by erosion and mass wasting event. Narrow, steep-sided valley that cuts into a continential slope.

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15
Q

Beach nourishment

A

The replacement of sediments on a beach.

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16
Q

Dendritic Drainage Basin

A

TREE (homogenous and flat-lying)

17
Q

Trellis

A

Bunch of little coming out of big (long linear valleys where drainage flows from eroded shales or limestones)

18
Q

Rectangular

A

Enhanced groundwater etches from chemical weathering

19
Q

Radial

A

Volcanoes (strato)

20
Q

Shreve

A

Additive

21
Q

Strahler

A

Game level

22
Q

Fill terrace

A

stream incises into the material that is deposited into a valley

23
Q

Strath terrace

A

Stream downcuts into bedrock.

24
Q

Discharge Changes downstream

A

Decrease in arid/increase in temperate

25
Q

3 Base leves/ Processes that lead them to change

A

Natural lake, dam, and ocean. Climate, tectonics, and isostacy.

26
Q

Sediment Grain Size changes downstream

A

Sediment grain size decreases downstream where there is larger volume of water and higher energy which causes more erosion because the sediments are rubbing together.

27
Q

History of sea level past 21000 years

A

Earth warmed 4 degrees, sea level rise by about 280 feet

28
Q

Mechanisms that supply sediment to coastal zone

A

Longshore drive, constructive waves, and current.

29
Q

Why are tides geomorphically important?

A

Groundwater fluctuations by the periodic saturated and unsaturated condition on the intertidal zone.

30
Q

Four types of estuaries

A

Coastal plain: drowned river valley, when a risen sea fills an existing river valley
Fjord: formed by glacier retreat
Tectonic: formed by tectonic shift
Bar-built: formed from a lagoon or bay that is protected by a barrier island, like a sandbar

31
Q

Geomorphic effects of jetty

A

Prevents erosion and traps sand from drifting along the beach