Unit 3 Sculpting Earth's Topography_ Lab Practical on Flash Flooding
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Arizona State University *
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Course
112
Subject
Geography
Date
Apr 3, 2024
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Pages
3
Uploaded by elcorrido
Question 10.5 pts
For this question, you will need to watch a video about a flash flooding event captured in the
summer of 2011 in Australia.
Most amazing flash flooding footage everLinks to an external site.
Most amazing flash flooding footage ever
As you watch the flood in progress, you can watch cars float away one-by-one. I hope that this
gives you pause before you yourself consider driving across a flooded roadway.
The topic here is how much running water does it take to make a SUV (sport utility vehicle) or
pick-up truck to float away.
Water weights 62.4 pounds per cubic foot. Given typical velocities of water running across
sloped roadways, for each foot the water rises, about 500 pounds of lateral force is applied and
the a typical vehicle volume displaces about 1500 pounds of water. This means that the car
weights 1500 pounds less for each foot the water rises.
A typical pickup truck weighs about 5000 pounds, while a Suburban weights about 5500
pounds. A car like a Civic weighs about 3000 pounds.
QUESTION: what is the height of water needed to float a Civic (divide the weight by 1500)?
Group of answer choices
About 0.5 feet of water
About 1500 feet of water
About 2 feet of water
About 4 feet of water
Flag question: Question 2
Question 20.5 pts
Watch
this video clipLinks to an external site.
and listen to the interview with the person who filmed it. The flash flood led to a mudflow that
trapped the individual being interviewed. In addition to the thunderstorm, what key factor
promoted the flash flooding that you watched?
Group of answer choices
Bare rock slopes generated the recorded flash flooding and mudflow.
A major water main leaked and generated the recorded flash flooding and mudflow.
A dam burst and generated the recorded flash flooding and mudflow.
A wildfire burn promoted the recorded flash flooding and mudflow.
Flag question: Question 3
Question 30.5 pts
For this question, you will need to watch a video about a flash flooding event captured in 2013.
Massive Flood Water in Vadi Fija Saudi ArabiaLinks to an external site.
Massive Flood Water in Vadi Fija Saudi Arabia
In the study of rivers, a very common indicator that physical geographers measure is discharge
(Q). Discharge is the amount of water that moves past a given cross-section of a river per
second. The measurement in Saudi Arabia is cubic meters per second. Width x depth x velocity
allows you to calculate discharge.
Please fill in the blank with the best answer. At the height of this flash flood, velocity of the flood
would have been _____________ with a width of 100 m, a depth of 4.5 m and a discharge of
1800 m3/sec
Group of answer choices
8 m/sec
4 m/sec
12 m/sec
12 ft/sec
Flag question: Question 4
Question 40.5 pts
For the question, you will need to watch this video
https://www.youtube.com/watch? v=wj7WnkgjhM0Links to an external site.
.
Question: Why were these people utter and complete idiots?
Group of answer choices
The other answers are all correct, and thus this is the best choice
Narrow river valleys take comparatively little water to fill up and drown whoever is dumb enough
hike in them during a thunderstorm.
These individuals went out hiking in a canyon during thunderstorm.
Bare rock slopes that very little infiltration capacity, meaning that they shed water very quickly
down to the river bottom.
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