15.7.1.2 - Conversion of point rainfall to areal rainfall
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Practice Questions
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What is point rainfall?
💡 Hint: Think about where rain is measured.
Name one method used to convert point rainfall to areal rainfall.
💡 Hint: What is the simplest method?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the main purpose of converting point rainfall to areal rainfall?
💡 Hint: Why do we need better data representation?
True or False: The Arithmetic Mean Method is the most accurate for uneven rainfall areas.
💡 Hint: Consider the limitations of the method.
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Challenge Problems
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Given rainfall data from four gauges: 7 mm, 12 mm, 10 mm, and 20 mm. Using the Arithmetic Mean, calculate the areal rainfall. Then discuss how this method might not reflect true areal rainfall in an area with varying distributions.
💡 Hint: Consider if there are any gauges much higher or lower than others.
You have rainfall data from five locations forming a Thiessen polygon. The gauges show 5 mm, 10 mm, 15 mm, 20 mm, and 25 mm. Discuss how you would apply these data using the Thiessen Polygon Method.
💡 Hint: Think about how you would determine which gauge influences which area.
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