Physical Geography Assessment Report

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Physical Geography Assessment – Altering Our Environment Overview In this assignment, we are going to use satellite images from the LandSat Thematic Mapper to observe how the environment has changed over time. Each of the images below shows an area of desert in Al Jouf, Saudi Arabia (30°N, 38.2°E). Most of the area in the first image, taken in 1991, is still desert, but there are a few circular areas that appear green. These green areas are fields of crops that are being watered using center-pivot irrigation (CPI). Each field has a well in the center that is attached to a long pipe on wheels that rotates in a giant circle around the well. Sprayers hang from the pipe and water the crops. Irrigation has allowed the Saudis to grow crops in the desert. 1991 2000 2004 Instructions Answer the following four questions using scientific terms and concepts from class. Your answer will be typed in a word processor. Turn in a digital copy (either in a MS Word or a pdf format) via Blackboard. Each question will be graded “credit” or “no credit” depending on your ability to answer the questions completely using scientific terms and concepts learned in physical geography. Answers that do not meet criteria will receive no credit. 1. In two paragraphs: 1.1 First describe what changed in this location. (1 point) 1.2 Then, explain how these changes are likely to affect (a) the local climate or (b) water resources. (1.5 point) 2. Use the satellite images to estimate the area of the center-pivot irrigation (CPI) fields in 1991, 2000, and 2004. CPI-irrigated fields appear as green, gray, and reddish-brown circles on the satellite images. Each circle covers approximately 0.166 km2 (1/6 km2). For this question, we will focus on the study area outlined in black in each of the three images. (1.5 point) a. How much land was irrigated in the black square in 1991? ________km2 b. How much land was irrigated in the black square in 2000? ________km2 c. How much land was irrigated in the black square in 2004? ________km2 2 3. In at least two paragraphs, explain how the changes taking place in the study area are related to an environmental issue of current importance to society. (3 points) 4. Describe a step-by-step scientific procedure that would allow you to use satellite imagery to measure the amount of forest in Maryland over time. Label each step with a number (for examples, Step 1: xxx. Step 2: xxx.). Base your procedure on the methods used in this worksheet to measure irrigated land in Saudi Arabia. (3 point)
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Running head: PHYSICAL GEOGRAPHY ASSESSMENT

Physical Geography Assessment – Altering Our Environment
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1

PHYSICAL GEOGRAPHY ASSESSMENT
Physical Geography Assessment – Altering Our Environment
Question 1
The area marked by satellite in 1991 was a dessert, a barren land with harsh climatic condition
which could not support any kind of agricultural growth. Since there was no enough water to
facilitate agricultural development. In the satellite image of 2000 and 2004, it shows how there
was an improvement where the area was artificially cultivated using irrigated water and
application of fertilizers making an improvement from a desert to cultivate land.
T...

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