Prelab 9: Flood Mapping 2
Due at the beginning of Lab 9
name ___________________________________
Directions and Rules for Prelabs:
 Prelabs are due at the beginning of the class, BEFORE the quiz (your instructor will designate a
place for you to place your prelab after walking in the classroom).
 NO late assignments will be accepted unless the absence is excused. That means if you are late
to class it will not be accepted, and if you are on time but turn it in late it will not be accepted.
Part 1. Exercise 9.1 (page 213-214). Making a simple contour map
READ sections 9.1 – 9.2 on contour maps. Also, the Powerpoint ‘Contour Lines’ found on the portal have
great suggestions for making a contour map. READ the instructions for Exercise 9.1, which explains how
to make a contour map. They are VERY helpful. Also, the Powerpoint ‘Contour Lines’ found on the portal
have great suggestions for making a contour map.
Use the map with a contour interval of 10 cm and sketch your contour lines in pencil. (You may want to
make a copy of this map to practice.)
Exercise 9.1 Map showing the heights (in centimeters) of pine saplings in different areas after 1 year of
growth.
Part 2. Exercise 9.4 (Page 221-222) Determining Elevations from Topographic Maps
Using the procedure describe in Exercise 9.4 on pg 221, answer the following questions from Exercise
9.4, using Figures from Chapter 9 in the lab manual.
a. _____________________________________________________________________________________________________________________
b. _____________________________________________________________________________________________________________________
c. – skip
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d. Figure 9.4
Highest point on Hunt Ridge:
________________________________
Highest point on Farrow Mountain: _________________________
Intersection of U.S. Route 1 and Maine Route 6 in Topsfield ________________________________
e. HIGH or LOW relief
f. HIGH or LOW relief
Part 3. Making a topographic Map.
Read the sections 9.1, 9.2, 9.3, and 9.5 (pages 212-228) of your lab manual. Refer to the PowerPoint
“Contour Lines” posted on OAKS to help complete this pre-lab. Pay close attention to Figure 2 on the
PowerPoint, Rules for Contour Lines, especially rules 1-6.
Using the figure below, construct a contour map, following the rules found on the CONTOUR LINE
powerpoint on the portal.
Use a contour interval of 100 feet. IMPORTANT: Contour lines do NOT go straight across a stream; they
form a ‘V’ upstream. The first contour line has been completed for you.
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