explain the well drawdown equations watch the

Question

Explain the Well Drawdown Equations

Watch the units, especially if you use log₁₀ or ln.   

h₁ = aquifer thickness minus the drawdown (ft)  r₁ = distance from well (ft)

h₂ = aquifer thickness minus the drawdown (ft)  r₂ = distance from well (ft)  

If the answer is in units of Q = ft³/day, use K units = ft³/day-ft² 

If the answer is in units of Q = gal/min or gal/day, use K units = gal/day-ft²