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Civil Engineering - Water Supply Engineering - Discussion

Discussion Forum : Water Supply Engineering - Section 8 (Q.No. 7)
Water Supply Engineering
7.
Pick up the correct statement from the following :
The volume of underground water extracted by gravity drainage from a saturated soil, is known as yield
The ratio of volume drained to the total volume of material drained, is known as specific yield
The volume of water retained by the soil against the pull of gravity, is called specific retention or field capacity
The sum of specific yield and specific retention, is equal to porosity
All the above.
Answer: Option
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