Question: 6 . 1 3 . A filter is used in a dam toe drain above a soil and the water flows from the soil to

6.13. A filter is used in a dam toe drain above a soil and
the water flows from the soil to the filter. The soil
permeability is 210-7ms. What is the minimum
required permeability of the filter?
6 . 1 3 . A filter is used in a dam toe drain

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