Pit inflow program (Marinelli & Niccoli, 1998) This program simulates pit into a rectangular area. It first calculates an effect (circular) radius of a rectangle (length x width) The radius of influence is then calculated (Niccoli et al, 1998) Flow into the pit is then calculated (Marinelli and Niccoli, 1998) The following assumptions apply to this equation
There is no groundwater flow between zones 1 and 2
- steady-state, unconfined, horizontal radial flow
- uniformly distributed recharge at the water table
- pit walls are approximated as a right circular cylinder
- initial static water table and groundwater flow are both horizontal
- groundwater flow to the pit is axially symmetric
- steady state flow to one side of a circular disk sink of constant and uniform drawdown
- hydraulic head is initially uniform throughout Zone 2.
- initial head is equal to the elevation of the initial water table in Zone 1
- disk sink has a constant hydraulic head equal to the elevation of the pit lake water surface
- flow to the disk sink is three-dimensional and axially symmetric
- materials are anisotropic, prinicipal directions for K are horizontal and vertical