Practice Demerits (9.1.5) - Theissen’s and Isohyetal Methods - Hydrology & Water Resources Engineering - Vol 1

Practice: Demerits

Lesson 9.1.5Theissen’s and Isohyetal Methods

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9 questions

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6 sample questions

Question 1.
What is one major demerit of the Theissen Polygon Method regarding elevation?
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Think about how elevation affects rainfall.
Question 2.
Why is it important to have an appropriately distributed network of rain gauge stations?
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Consider what happens if stations are too far apart.
3Question 3.
What is a major limitation of the Theissen Polygon Method?
- It accurately considers elevation
- It ignores topographical influences
- It simplifies rainfall distribution
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Think about what features directly affect rainfall accumulation.
4Question 4.
True or False: The Theissen Polygon Method is effective in areas with uneven station distribution.
- True
- False
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Reflect on what different station placements can cause in terms of data quality.
Question 5.
Given a catchment with 4 rain gauges spread across varied elevations, analyze the potential risks involved with applying the Theissen Polygon Method. Suggest alternative methods that may offer improved accuracy.
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Reflect on the influence of different terrains on rainfall.
Question 6.
Consider a region where rain gauges are clustered in one area while other parts are unmonitored. Discuss the implications of this layout using the Theissen Method and present a better sampling strategy.
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Think about the layout similar to city planning where resources must be spread efficiently.

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