Lab 08_ eolian and arid landscapes


Lab 08: EOLIAN AND ARID LANDSCAPES

Note: Please allude to the GETTING STARTEDmodule to collect how to maneuver through, and how to repartee the lab topics, in the Google Earth () constituent.

KEY TERMS

You should perceive and perceive the forthcoming terms:

 

Abrasion

Loess

Rain sham

Barchan dune

Longitudinal dune

Reversing dune

Barchanoid Ridge dune

Mesa

Star dune

Butte

Parabolic dune

Sub-tropical haughty

Canyon

Pinnacle

Transverse dune

Desertification

Plateau

Yardang

Dome dune

Playa

 

 

LAB LEARNING OBJECTIVES

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

·         Identify erosional processes and indications fashiond by wind

·         Identify safetyional processes and indications fashiond by wind

·         Describe the processes that fashion eolian locateforms

·         Distinguish irrelative sand dune marks

·         Calculate float

·         Interpret the topographic indication of a demesnecape

 

INTRODUCTION

This module examines the eolian processes and sterile environments. Topics grasp dune assortment, eolian processes and indications, and sterile locateforms. Occasion these themes may confutation to be ill-assorted, you conciliate collect how they are inherently akin. The module starts after a occasion filthy gap themes, or vignettes, which are endow in the related Google Earth refine. These vignettes preface basic concepts of the eolian and sterile demesnecapes. Some of the vignettes feel lifes, videos, or soon profession that conciliate afford another perspective or visual description for the theme at agency.  After lection the vignette and associated links, repartee the forthcoming topics. Please silence that some links authority interest a occasion to download domiciled on your Internet hurry.

 Expandthe INTRODUCTION folder and then check Theme 1: Introduction.

 Read Topic 1: Introduction.

Question 1: Which of the forthcoming was not affordd in the Introduction as a speciality of an sterile environment?

A.   Little colony

B.   Drought cubic vegetation

C.   Sparse vegetation

D.   Hot temperatures

 Read Topic 2: Sterile Locate and Water

Question 2: What is not listed as a commencement of impart for ethnical use in sterile environments in Theme 2?

A.   Wells

B.   Salt impart

C.   Oases

D.   Rainfall

 Read Topic 3: Hot and Frigid Deserts.

Question 3: What specialitys of polar wildernesss fruit them suitcogent for consider by planetary scientists?

A.   Barren demesnecapes

B.   Cold tract-of-land

C.   Isolation

D.   All of the balance

 Read Topic 4: Ethnical Interaction.

Question 4: Which of the forthcoming is not one of the filthy techniques that ethnicals feel employed to seal wildernessification.

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 safety and what is the profundity?

A.   Kansas, 120m

B.   Nebraska, 95m

C.   China, 335m

D.   Iran, 40m

 Collapse and uncheck INTRODUCTION

GLOBAL PERSPECTIVE

 Expand GLOBAL PERSPECTIVE. Double-click and extracted Major Cosmos-people Deserts.

This map shows the colony of senior wildernesss (in tan) throughout the cosmos-people.  It is main to silence that occasion wildernesss are regularly considered sterile environments, sterile environments are not regularly wildernesss.  Sterile environments too grasp Mediterranean tract-of-property and semi-sterile demesne, unarranged others.  Areas where impart is severely poor, eolian processes beseem the dominant contrivance for erosion, demeanor and safetyion of sediments.

 Expand and extracted Major Cities.

This map shows the colony of senior cities located in sterile environments. At confer-upon, such cities are placing increasing constraining on impart instrument and contributing to wildernessification.

For Questions 6 to 9, mark the notification affordd in the Search tab in Google Earth and constrain Enter. When you reach at your scope, invent the notification to rise in the blanks adown.

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 contents wave the colony of wildernesss:

·         Subtropical haughty constraining systems

·         Rain sham movables

·         Ocean prevalent temperatures

·         Distance to great bodies of impart

It is main to silence that two or past of these contents may wave the colony of wildernesss.

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

Subtropical haughty constraining systems are generally located among 15 and 30 degrees north and south. At these colonys, haughty constraining systems continue, after a occasion descending air warming as it falls. The end is a tract-of-land of hot temperatures and brief colony. The Sahara wilderness is a good-tempered-tempered-natured-natured development of a wilderness formed consequently of a subtropical haughty constraining system.

 Double‑click and extracted Oregon Great Sandy Desert.

The rain sham movables can be seen on the leeward margin on mountain ranks. An air substantiality approaching a mountain rank is constrained upward by the mountains and colony ends on the windward margin of the rank. On the leeward margin, the air substantiality loses most of its dampness and warms as it descends the mountain rank. The end is a semi-sterile to sterile demesnecape. The Oregon Great Sandy wilderness is a good-tempered-tempered-natured-natured development.

 Double‑click and extracted Atacama Desert.

Cold main prevalents do not significantly intensity air substantiality balance them. The end is an air substantiality containing brief dampness, and when the air substantiality reaches locate, colony is approximately non-existent. The Atacama Wilderness is a good-tempered-tempered-natured-natured development.

 Double‑click and extracted Gobi Desert.

The removal to a great substantiality of impart such as an main or sea, is a content, consequently impart bodies can afford dampness to air substantialityes, which in adapt administer to colony. The prefer an area is from a great substantiality of impart, the hither slight it is to accept dampness. The Gobi Wilderness straddling the China-Mongolia edging is an development of an sterile tract-of-land far from a great substantiality of impart.

 Double‑click and extracted Namib Desert.

Question 10: Which of the forthcoming contents is chiefly imperative for the colony of the Namib Desert?

A.   Subtropical haughty constraining

B.   Rain sham movables

C.   Cold main prevalents

D.   Distance from great substantiality of impart

Question 11: Why did you extract the repartee, or repartees, you did in topic 10?

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

B.   The coastal beaches fashion a rain sham internal

C.   The frigid main prevalent limits dampness in sky creating the coastal wilderness

D.  The wilderness is a covet removal from any inlocate substantiality of impart

 Double‑click and extracted Patagonia.

Question 12: Which of the forthcoming contents are chiefly imperative for the colony of the sterile demesne in Patagonia?

A.   Subtropical haughty constraining

B.   Rain sham movables

C.   Cold main prevalents

D.   Distance from great substantiality of impart

Question 13: Why did you extract the repartee, or repartees, you did in topic 12?

A.   It is a silenced subtropical haughty area

B.   The coastal mountains fashion a rain sham internal

C.   The frigid main prevalent limits dampness in sky creating the coastal wilderness

D.   The wilderness is a covet removal from any inlocate substantiality of impart

 Double‑click and extracted Taklimakan Desert.

Question 14: Which of the forthcoming contents are chiefly imperative for the colony of the Taklimakan Desert?

A.   Subtropical haughty constraining

B.   Rain sham movables

C.   Cold main prevalents

D.   Distance from great substantiality of impart

Question 15: Why did you extract the repartee, or repartees, you did in topic 14?

A.   It is a silenced subtropical haughty area

B.   The coastal beaches fashion a rain sham internal

C.   The frigid main prevalent limits dampness in sky creating the coastal wilderness

D.   The wilderness is a covet removal from any inlocate substantiality of impart

 Double‑click, and extracted, Mojave Desert.

Question 16: Which of the forthcoming contents are chiefly imperative for the colony of the Mojave Desert?

A.   Subtropical haughty constraining

B.   Rain sham movables

C.   Cold main prevalents

D.   Distance from great substantiality of impart

Question 17: Why did you extract the repartee, or repartees, you did in topic 16?

A.   It is a silenced subtropical haughty area

B.   The sterile environment fashions a rain sham internal

C.   The frigid main prevalent limits dampness in sky creating the coastal wilderness

D.   The wilderness is a covet removal from any substantiality of impart

 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 extracted Fly Over. Watch the fly balance of the Spider Rock colony to get an balanceview of the indications and terrain in the area.

 Select Spider Rock. Use the nakedness slide adherent to collate the aerial photograph to the topographic map. As you can see, there are sundry indications contemptible to this sterile environment.

 

Identify the indications labeled  through .

Question 18: Indication : D

A. Canyon

B. Alluvial Fan

C. Butte

D. Pinnacle

E. Plateau

F. Playa

Question 19: Indication : C

A. Canyon

B. Alluvial Fan

C. Butte

D. Pinnacle

E. Plateau

F. Playa

Question 20: Indication : E

A. Canyon

B. Alluvial Fan

C. Butte

D. Pinnacle

E. Plateau

F. Playa

Question 21: Indication : A

A. Canyon

B. Alluvial Fan

C. Butte

D. Pinnacle

E. Plateau

F. Playa

 Double‑click . This indication is endow at the meanest rise after a occasionin the tract-of-land, where haughty evaporation rates license minerals (salt) from the impart onto the cause demeanor.

Question 22: Indication : 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 extracted .

Question 23: Confirm Indication : B

A. Canyon

B. Alluvial Fan

C. Butte

D. Pinnacle

E. Plateau

F. Playa

 

 Double-click and extracted Measure Removal

Question 24: Scold the removal (in km) opposing the Indication :

A.   2km

B.   4km

C.   6km

D.   8km

Question 25: What deposition continues of ethnical temper on Indication ?

A.   Landing strip

B.   Trailer park

C.   Road

D.   Beach

 Double-click and extracted Slope 1. Right‑click the epithet Slope 1, and then extracted Show Rise Profile.

Using the rise lections (that is, locate your cursor balance the rise indication chart), scold the float of the sequences. Recall that float is rise/run and the units need to be the corresponding when dividing (that is, twain in feet).

Question 26: What is the RISE (rise bring-about) in feet? (Select the repartee closest to the one you see in the Rise Indication Window)

A.   400 ft

B.   51.4 ft

C.   21.8 ft

D.   35 ft

Question 27: What is the RUN of the sequence (distance) in miles? (Select the repartee closest to the one you see in the Rise Indication Window).

A.   7.73 miles

B.   4.11 miles

C.   2.05 miles

D.   5.14 miles

Question 28: What is the float of the sequence (mean float)? (Select the repartee closest to the one you see in the Rise Indication Window).

A.   25%

B.   -51.4%

C.   3.8%

D.   -35%

 Double-click and extracted Slope 2. Right‑click the epithet Slope 2, extracted Show Rise Profile, and then scold the float of the red sequence.

Question 29: What is the RISE (rise bring-about) in feet? (Select the repartee closest to the one you see in the Rise Indication Window)

A.   3000 ft

B.   -449 ft

C.   1005 ft

D.   2077 ft

Question 30: What is the RUN of the sequence (distance) in miles? (Select the repartee closest to the one you see in the Rise Indication Window)

A.   8.0 miles

B.   3.3 miles

C.   0.28 miles

D.   26.5 miles

Question 31: What is the float of the sequence (unequivocal mean float)? (Select the repartee closest to the one you see in the Rise Indication Window)

A.   84.4%

B.   -39.4%

C.   22.5%

D.   -10.9%

The x-axis is the removal acovet the rise indication.  

Question 32: The highest float is located among which removal 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 indication of an sterile demesnecape that would fruit Indication

A.   Steep floats ghostly giving way to a polite float

B.   Steep floats acovet the undiminished indication

C.   Gentle floats acovet the undiminished indication

D.   Alternating craggy and polite floats

SAND DUNE CLASSIFICATION

 Click SAND DUNE CLASSIFICATION.

Use the life to confirm specialitys of dune marks and to full the tcogent adown. The leading one has been effected for you as an development

Dune mark

Wind

Sand

Vegetation

Barchan

A.   Periodic reversing of direction

B.   Two directions

C.   One perpetual direction

D.  Varicogent 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.   Varicogent directions

D.   One perpetual 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 perpetual direction

D.   Varicogent directions

A.   Limited

B.   Moderate

C.   Variable

D.   Abundant

A.   Yes

B.   No

Question 36: Longitudinal

A.   Periodic reversing of direction

B.   One perpetual direction

C.   Two directions

D.  Varicogent directions

A.   Limited

B.   Moderate

C.   Abundant

D.   Variable

A.   Yes

B.   No

Question 37: Parabolic

A.   Periodic reversing of direction

B.   One perpetual direction

C.   Two directions

D.  Varicogent directions

A.   Limited

B.   Moderate

C.   Abundant

D.   Variable

A.   Yes

B.   No

Question 38: Star

A.   Periodic reversing of direction

B.   One perpetual direction

C.   Two directions

D.  Varicogent directions

A.   Limited

B.   Moderate

C.   Abundant

D.   Variable

A.   Yes

B.   No

Question 39: Dome

A.   Periodic reversing of direction

B.   One perpetual direction

C.   Two directions

D.  Varicogent directions

A.   Limited

B.   Moderate

C.   Variable

D.   Abundant

 

A.   Yes

B.   No

Question 40: Reversing

A.   Periodic reversing of direction

B.   One perpetual direction

C.   Two directions

D.  Varicogent directions

A.   Limited

B.   Moderate

C.   Abundant

D.   Variable

A.   Yes

B.   No