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3 cards from this section. Quick, good the night before a test.
What is the Thiessen Polygon Method used for?
Think about rainfall variability and averaging techniques.
Name one advantage of the Thiessen Polygon Method.
Consider how the method uses gauge locations.
What primary advantage does the Thiessen Polygon Method offer over simpler methods?
Think about what the method is designed to measure.
True or False: The Thiessen Polygon Method assumes that rainfall is uniform within each polygon.
Recall the characteristics of the method.
Given a scenario with five rain gauge stations in a watershed with the following recorded rainfall amounts: Gauge A: 2.5 in, Gauge B: 3.1 in, Gauge C: 4.4 in, Gauge D: 3.6 in, Gauge E: 1.9 in. The area influenced by these gauges is 10 sq miles total. If Gauge A's polygon covers 3 sq miles, Gauge B covers 2 sq miles, Gauge C covers 1 sq mile, Gauge D covers 2.5 sq miles, and Gauge E covers 1.5 sq miles, calculate the mean precipitation.
Ensure you calculate the weighted average correctly.
Describe a case where using the Thiessen Polygon Method would yield significantly different results from the Arithmetic Mean Method. Why would this be the case?
Focus on how the spatial configuration of rainfall affects outcomes.
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