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**Question 1. A catchment may be idealised as a rectangle. There are three rain gauges located inside the catchment at arbitrary locations. The average precipitation over the catchment is estimated by two methods: [2019 : 1 Mark, Set-I](i) Arithmetic mean (P _{A}), and(ii) Thiessen polygon (P_{T}). Which one of the following statements is correct?(a) P_{A} is always smaller than P_{T}(b) P_{A} is always equal to P_{T}(c) There is no definite relationship between P_{A} and P_{T}(d) P_{A} is always greater than P_{T }Answer: **(c)

Solution:

âˆ´ There is no any relation between P

The Thiessen mean value (in mm, up to one decimal place) of the rainfall is______ [2018 : 2 Marks, Set-I]

Solution:

During a month, the precipitation at these gauges is measured as G

Let sides of square be, a = 25 km Now area of the polygon is calculated as,

Solution:

N

(a) equal temperature

(b) equal humidity

(c) equal rainfall depth

(d) equal evaporation

Answer:

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