Soil needs to be compacted to its optimum bulk density of 2 gm/cc at 15% moisture content (mass basis) for an earthen dam structure. If the soils are initially at 10% moisture content (mass basis) with 1. 2 gm/cc bulk density, how much water volume needs to be added or removed before you start compaction for the 15 m long, 3 m high compacted dam with bottom width of 5 m and top width of 2 m (trapezoidal section)
