a) What fracture aperture is required for a single fracture to conduct the same amount of water (at 10 degrees celcius) as a 8.0 m thick deposit of sand with a hydraulic conductivity K= 10-6 m/sec? Assume the hydraulic gradient is the same in both cases.
b) What would the aperture have to be if there were two fractures of equal aperture? For your calculations you can assume that the rock matrix that contains the fracture(s) has zero hydraulic conductivity.