SIGMA/W Model SIGMA/W Model for WKP Mine Dewatering Figure A7 Water Table at Surface before mining Boundary Condition 1: Fixed Horizontal Movement Boundary Condition 1: Fixed Horizontal Movement Boundary Condition 2: Fixed Horizontal and Vertical Movement Movement Rhyolite Pyroclastics Rhyolite Flow Rhyolite Pyroclastics Regolith Andesite Flow Assumed worse case drawdown to base of mine at RL180m, during mining. RL200m RL40m RL-180m RL-300m RL-400m RL-600m
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