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Given that the ground water table elevation on the valley sides is 1505 m, and the stream water elevation is 1475 m, with a 60° slope of permeable soil between elevations 1485 m and 1500 m, at which reduced level is a gravity spring likely to occur?

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Subject
Water Supply Engineeringcivil-engineering-mcqs › water-supply-engineering
Published
19 Jan 2019
Last updated
28 May 2026

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Explanation

A gravity spring forms where the permeable soil layer intersects the ground surface, allowing groundwater to emerge naturally. Since the permeable soil lies between 1485 m and 1500 m, and the groundwater table is at 1505 m while the stream is at 1475 m, the spring will occur at the lower boundary of the permeable layer, which is 1485 m.

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