1.

What is Pack Aquifer Ratio?

A. D<sub>50</sub> of the gravel / D<sub>50</sub> of the aquifer
B. D<sub>50</sub> of the aquifer / D<sub>50</sub> of the gravel
C. D<sub>60</sub> of the aquifer material / D<sub>10</sub> of the aquifer material
D. D<sub>60</sub> of the gravel / D<sub>10</sub> of the aquifer
Answer» B. D<sub>50</sub> of the aquifer / D<sub>50</sub> of the gravel


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