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What is the measure of the fineness of an aquifer?

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in Irrigation Engineering by (75.2k points)
What is the measure of the fineness of an aquifer?

(a) Average grain size

(b) Effective diameter

(c) Mean particle size

(d) Uniformity coefficient

This question was posed to me in homework.

Question is from Tube Well-1 topic in portion Ground Water for Irrigation through Wells and Tubewells of Irrigation Engineering

1 Answer

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by (106k points)
Right choice is (b) Effective diameter

Explanation: Effective diameter is an index of the measure of the fineness of an aquifer. It is used for designing various intake components of a tubewell. For permeability D10 (i.e. 90% grains retained on the sieve) is taken as the effective size.

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