The period considered for calculation average annual rainfall of region is ______?
BPSC Past Papers / All — Multiple-choice practice
اس خطے کی اوسط سالانہ بارش کے حساب کتاب کے لئے غور کیا جاتا ہے؟
- A. 15 years
- B. 25 years
- C. None of these
- D. 35 years
Correct answer
35 years
Explanation
Explanation A long period (about 35 years ) is used to smooth out yearly rainfall fluctuations. It gives a reliable and representative average for hydrological planning.
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