(1) 7 1000 T Ah 900 B h:1000 D h 900 h : 975 h=925 800 . h-950 (a) Elevation (m) 9 to 2 (2 ) 1000 a) In the setting shown in figure (1), if the aquifer has a hydraulic conductivity of 0.5m/day & porosity 40%, what is the approximate groundwater travel time below the dam wall (black arrow)? b) Can Darcy's law be used to calculate the travel time over the same distance in (2) where the h value behind the dam wall changes (falls) over time? Explain. 900 800 1000 he 900 to 11 Time