Lab 08_ eolian and arid landscapes


Lab 08: EOLIAN AND ARID LANDSCAPES

Note: Please allude to the GETTING STARTEDmodule to glean how to maneuver through, and how to apology the lab scrutinys, in the Google Earth () rudiment.

KEY TERMS

You should perceive and discern the forthcoming terms:

 

Abrasion

Loess

Rain unsubstantiality

Barchan dune

Longitudinal dune

Reversing dune

Barchanoid Ridge dune

Mesa

Star dune

Butte

Parabolic dune

Sub-tropical tall

Canyon

Pinnacle

Transverse dune

Desertification

Plateau

Yardang

Dome dune

Playa

 

 

LAB LEARNING OBJECTIVES

After successfully completing this module, you should be talented to do the forthcoming tasks:

·         Identify erosional processes and marks fashiond by wind

·         Identify bondional processes and marks fashiond by wind

·         Describe the processes that fashion eolian plantforms

·         Distinguish divergent sand dune marks

·         Calculate tower

·         Interpret the topographic form of a probability

 

INTRODUCTION

This module examines the eolian processes and unproductive environments. Topics embrace dune kind, eolian processes and marks, and unproductive plantforms. Period these subjects may confutation to be unequal, you earn glean how they are inherently allied. The module starts after a period impure inauguration subjects, or vignettes, which are plant in the congenial Google Earth smooth. These vignettes frame-unreserved basic concepts of the eolian and unproductive probabilitys. Some of the vignettes accept exhilarations, videos, or blunt catechism that earn product another perspective or visual exposition for the subject at laborer.  After lection the vignette and associated links, apology the forthcoming scrutinys. Please voicelessness that some links strength engage a period to download basised on your Internet hasten.

 Expandthe INTRODUCTION folder and then check Subject 1: Introduction.

 Read Topic 1: Introduction.

Question 1: Which of the forthcoming was not productd in the Introduction as a diagnosis of an unproductive environment?

A.   Little colonization

B.   Drought substantial vegetation

C.   Sparse vegetation

D.   Hot temperatures

 Read Topic 2: Unproductive Plant and Water

Question 2: What is not listed as a spring of insinuate for cosmical use in unproductive environments in Subject 2?

A.   Wells

B.   Salt insinuate

C.   Oases

D.   Rainfall

 Read Topic 3: Hot and Deliberate Deserts.

Question 3: What diagnosiss of polar wilds frame them suittalented for con-aggravate by planetary scientists?

A.   Barren probabilitys

B.   Cold air

C.   Isolation

D.   All of the aggravate

 Read Topic 4: Cosmical Interaction.

Question 4: Which of the forthcoming is not one of the impure techniques that cosmicals accept assiduous to seal wildification.

A.   Covering sand dunes in petroleum

B.   Building sand fences

C.   Covering sand dunes in plastic

D.   Planting vegetation

 Read Topic 5: Eolian Landscapes.

Question 5: Where is the thickest perceiven Loess bond and what is the profoundness?

A.   Kansas, 120m

B.   Nebraska, 95m

C.   China, 335m

D.   Iran, 40m

 Collapse and uncheck INTRODUCTION

GLOBAL PERSPECTIVE

 Expand GLOBAL PERSPECTIVE. Double-click and fine Major Globe Deserts.

This map shows the subsidence of superior wilds (in tan) throughout the globe.  It is essential to voicelessness that period wilds are faithfully considered unproductive environments, unproductive environments are not faithfully wilds.  Unproductive environments also embrace Mediterranean climes and semi-unproductive plants, unordered others.  Areas where insinuate is severely poor, eolian processes befit the dominant mechanism for erosion, mien and bondion of sediments.

 Expand and fine Major Cities.

This map shows the subsidence of superior cities located in unproductive environments. At offer, such cities are placing increasing exigency on insinuate media and contributing to wildification.

For Questions 6 to 9, mark the counsel productd in the Search tab in Google Earth and crowd Enter. When you enter at your intention, discaggravate the counsel to satisfy in the blanks underneath.

Question 6:         Cairo, Egypt (population : X)

Latitude/Longitude:

A.   30N, 31E

B.   31N, 30E

C.   C. 30S, 31W

D.   D. 31N, 30 W

Question 7: Riyad, Saudi Arabia (population : X)

Latitude/Longitude:

A.   24N, 46E

B.   46S, 24E

C.   24N, 46W

D.   46N, 24W

Question 8:         12° 2'49.53"S, 77° 0'37.67"W (population : X)

City:

A.   Santiago

B.   Lima

C.   Bogotá

D.   Paracas

Question 9:33°22'22.03"N, 112°34'48.60"W (population : X)

City:

A.   Las Vegas

B.   Los Angeles

C.   Phoenix

D.   Tucson

 Collapse and uncheck GLOBAL PERSPECTIVE

 

LOCATION OF ARID REGIONS

The forthcoming ingredients govern the subsidence of wilds:

·         Subtropical tall exigency systems

·         Rain unsubstantiality consequence

·         Ocean general temperatures

·         Distance to vast bodies of insinuate

It is essential to voicelessness that two or aggravate of these ingredients may govern the subsidence of wilds.

 Expand the LOCATION OF ARID REGIONS folder. Double‑click and fine Sahara Desert.

Subtropical tall exigency systems are generally located between 15 and 30 degrees north and south. At these subsidences, tall exigency systems continue, after a period descending air warming as it falls. The outcome is a air of hot temperatures and unimportant colonization. The Sahara wild is a cheerful copy of a wild formed consequently of a subtropical tall exigency system.

 Double‑click and fine Oregon Great Sandy Desert.

The rain unsubstantiality consequence can be seen on the leeward verge on mountain collocates. An air majority approaching a mountain collocate is flinty upward by the mountains and colonization outcomes on the windward verge of the collocate. On the leeward verge, the air majority loses most of its humidity and warms as it descends the mountain collocate. The outcome is a semi-unproductive to unproductive probability. The Oregon Great Sandy wild is a cheerful copy.

 Double‑click and fine Atacama Desert.

Cold sea generals do not significantly ardor air majority aggravate them. The outcome is an air majority containing unimportant humidity, and when the air majority reaches plant, colonization is approximately non-existent. The Atacama Wild is a cheerful copy.

 Double‑click and fine Gobi Desert.

The space to a vast collection of insinuate such as an sea or sea, is a ingredient, consequently insinuate bodies can product humidity to air majorityes, which in deviate direct to colonization. The raise an area is from a vast collection of insinuate, the short slight it is to take humidity. The Gobi Wild straddling the China-Mongolia confine is an copy of an unproductive clime far from a vast collection of insinuate.

 Double‑click and fine Namib Desert.

Question 10: Which of the forthcoming ingredients is amplely under obligation for the subsidence of the Namib Desert?

A.   Subtropical tall exigency

B.   Rain unsubstantiality consequence

C.   Cold sea generals

D.   Distance from vast collection of insinuate

Question 11: Why did you pluck the apology, or apologys, you did in scrutiny 10?

A.   Lack of clouds in imagery shows it is a subtropical tall area

B.   The coastal beaches fashion a rain unsubstantiality inside

C.   The deliberate sea general limits humidity in latitude creating the coastal wild

D.  The wild is a desire space from any inplant collection of insinuate

 Double‑click and fine Patagonia.

Question 12: Which of the forthcoming ingredients are amplely under obligation for the subsidence of the unproductive plants in Patagonia?

A.   Subtropical tall exigency

B.   Rain unsubstantiality consequence

C.   Cold sea generals

D.   Distance from vast collection of insinuate

Question 13: Why did you pluck the apology, or apologys, you did in scrutiny 12?

A.   It is a voicelessnessd subtropical tall area

B.   The coastal mountains fashion a rain unsubstantiality inside

C.   The deliberate sea general limits humidity in latitude creating the coastal wild

D.   The wild is a desire space from any inplant collection of insinuate

 Double‑click and fine Taklimakan Desert.

Question 14: Which of the forthcoming ingredients are amplely under obligation for the subsidence of the Taklimakan Desert?

A.   Subtropical tall exigency

B.   Rain unsubstantiality consequence

C.   Cold sea generals

D.   Distance from vast collection of insinuate

Question 15: Why did you pluck the apology, or apologys, you did in scrutiny 14?

A.   It is a voicelessnessd subtropical tall area

B.   The coastal beaches fashion a rain unsubstantiality inside

C.   The deliberate sea general limits humidity in latitude creating the coastal wild

D.   The wild is a desire space from any inplant collection of insinuate

 Double‑click, and fine, Mojave Desert.

Question 16: Which of the forthcoming ingredients are amplely under obligation for the subsidence of the Mojave Desert?

A.   Subtropical tall exigency

B.   Rain unsubstantiality consequence

C.   Cold sea generals

D.   Distance from vast collection of insinuate

Question 17: Why did you pluck the apology, or apologys, you did in scrutiny 16?

A.   It is a voicelessnessd subtropical tall area

B.   The unproductive environment fashions a rain unsubstantiality inside

C.   The deliberate sea general limits humidity in latitude creating the coastal wild

D.   The wild is a desire space from any collection of insinuate

 Collapse and uncheck LOCATION OF ARID REGIONS

 

 

 

EROSIONAL AND TRANSPORTATION PROCESSES AND LANDFORMS

 Expand EROSIONAL AND TRANSPORTATION PROCESSES AND LANDFORMS.

 Expand Erosional Features.

 Double‑click and fine Fly Over. Watch the fly aggravate of the Spider Rock subsidence to get an aggravateview of the marks and terrain in the area.

 Select Spider Rock. Use the truthfulness slide constabulary to assimilate the aerial photograph to the topographic map. As you can see, there are sundry marks vulgar to this unproductive environment.

 

Identify the marks labeled  through .

Question 18: Mark : D

A. Canyon

B. Alluvial Fan

C. Butte

D. Pinnacle

E. Plateau

F. Playa

Question 19: Mark : C

A. Canyon

B. Alluvial Fan

C. Butte

D. Pinnacle

E. Plateau

F. Playa

Question 20: Mark : E

A. Canyon

B. Alluvial Fan

C. Butte

D. Pinnacle

E. Plateau

F. Playa

Question 21: Mark : A

A. Canyon

B. Alluvial Fan

C. Butte

D. Pinnacle

E. Plateau

F. Playa

 Double‑click . This mark is plant at the last altitude after a periodin the clime, where tall evaporation rates liberty minerals (salt) from the insinuate onto the basis deportment.

Question 22: Mark : F

A. Canyon

B. Alluvial Fan

C. Butte

D. Pinnacle

E. Plateau

F. Playa

 

Depositional Processes and Landforms

 Double-click Depositional Feature. Double-click and fine .

Question 23: Test Mark : B

A. Canyon

B. Alluvial Fan

C. Butte

D. Pinnacle

E. Plateau

F. Playa

 

 Double-click and fine Measure Space

Question 24: Value the space (in km) aggravate the Mark :

A.   2km

B.   4km

C.   6km

D.   8km

Question 25: What declaration continues of cosmical ardor on Mark ?

A.   Landing strip

B.   Trailer park

C.   Road

D.   Beach

 Double-click and fine Slope 1. Right‑click the heading Slope 1, and then fine Show Altitude Profile.

Using the altitude lections (that is, assign your cursor aggravate the altitude form chart), value the tower of the rows. Recall that tower is rise/run and the units want to be the identical when dividing (that is, twain in feet).

Question 26: What is the RISE (altitude product) in feet? (Select the apology closest to the one you see in the Altitude Form Window)

A.   400 ft

B.   51.4 ft

C.   21.8 ft

D.   35 ft

Question 27: What is the RUN of the row (distance) in miles? (Select the apology closest to the one you see in the Altitude Form Window).

A.   7.73 miles

B.   4.11 miles

C.   2.05 miles

D.   5.14 miles

Question 28: What is the tower of the row (middle tower)? (Select the apology closest to the one you see in the Altitude Form Window).

A.   25%

B.   -51.4%

C.   3.8%

D.   -35%

 Double-click and fine Slope 2. Right‑click the heading Slope 2, fine Show Altitude Profile, and then value the tower of the red row.

Question 29: What is the RISE (altitude product) in feet? (Select the apology closest to the one you see in the Altitude Form Window)

A.   3000 ft

B.   -449 ft

C.   1005 ft

D.   2077 ft

Question 30: What is the RUN of the row (distance) in miles? (Select the apology closest to the one you see in the Altitude Form Window)

A.   8.0 miles

B.   3.3 miles

C.   0.28 miles

D.   26.5 miles

Question 31: What is the tower of the row (real middle tower)? (Select the apology closest to the one you see in the Altitude Form Window)

A.   84.4%

B.   -39.4%

C.   22.5%

D.   -10.9%

The x-axis is the space adesire the altitude form.  

Question 32: The highest tower is located between which space markers on the x-axis?

A.   0.75 miles and 1 mile

B.   2.25 miles and 2.5 miles

C.   2.5 miles and 2.75 miles

D.   2.75 miles and 3 miles

Question 33: Describe the topographic form of an unproductive probability that would product Mark

A.   Steep towers spiritual giving way to a tame tower

B.   Steep towers adesire the undiminished form

C.   Gentle towers adesire the undiminished form

D.   Alternating craggy and tame towers

SAND DUNE CLASSIFICATION

 Click SAND DUNE CLASSIFICATION.

Use the exhilaration to test diagnosiss of dune marks and to adequate the ttalented underneath. The primary one has been performed for you as an copy

Dune mark

Wind

Sand

Vegetation

Barchan

A.   Periodic reversing of direction

B.   Two directions

C.   One faithful direction

D.  Varitalented directions

A.   Limited

B.   Moderate

C.   Abundant

D.   Variable

A.   Yes

B.   No

Question 34: Barchanoid Ridge

A.   Periodic reversing of direction

B.   Two directions

C.   Varitalented directions

D.   One faithful direction

A.   Limited

B.   Abundant

C.   Moderate

D.   Variable

A.   Yes

B.   No

Question 35: Transverse

A.   Periodic reversing of direction

B.   Two directions

C.   One faithful direction

D.   Varitalented directions

A.   Limited

B.   Moderate

C.   Variable

D.   Abundant

A.   Yes

B.   No

Question 36: Longitudinal

A.   Periodic reversing of direction

B.   One faithful direction

C.   Two directions

D.  Varitalented directions

A.   Limited

B.   Moderate

C.   Abundant

D.   Variable

A.   Yes

B.   No

Question 37: Parabolic

A.   Periodic reversing of direction

B.   One faithful direction

C.   Two directions

D.  Varitalented directions

A.   Limited

B.   Moderate

C.   Abundant

D.   Variable

A.   Yes

B.   No

Question 38: Star

A.   Periodic reversing of direction

B.   One faithful direction

C.   Two directions

D.  Varitalented directions

A.   Limited

B.   Moderate

C.   Abundant

D.   Variable

A.   Yes

B.   No

Question 39: Dome

A.   Periodic reversing of direction

B.   One faithful direction

C.   Two directions

D.  Varitalented directions

A.   Limited

B.   Moderate

C.   Variable

D.   Abundant

 

A.   Yes

B.   No

Question 40: Reversing

A.   Periodic reversing of direction

B.   One faithful direction

C.   Two directions

D.  Varitalented directions

A.   Limited

B.   Moderate

C.   Abundant

D.   Variable

A.   Yes

B.   No