2082 Chaitra2081 ChaitraChapter 2: Introduction to Hydrology2.1 Descriptive Hydrology
Explain the Thiessen polygon method for estimating the average rainfall over a catchment area.
CE 660 · Chapter 2
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Explain the Thiessen polygon method for estimating the average rainfall over a catchment area.
With a neat sketch, explain the hydrological cycle.
Calculate the average precipitation using the arithmetic mean method and the Thiessen polygon method based on the following data.
| Station No. | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| Precipitation ($\text{mm}$) | 30.8 | 34.6 | 32.0 | 24.6 |
| Area ($\text{km}^2$) | 45 | 40 | 30 | 38 |