Project Information
Aquifer Parameters
Seepage Formula: Q = T × i × L (Darcy's Law for linear flow)
Where: T = K × H (Transmissivity), i = Hydraulic Gradient, L = Perimeter
Radius of Influence (R) calculated using Sichardt/Kusakin/Cooper-Jacob for reference
Where: T = K × H (Transmissivity), i = Hydraulic Gradient, L = Perimeter
Radius of Influence (R) calculated using Sichardt/Kusakin/Cooper-Jacob for reference
m/day
days
days
🌧️ Rainfall & Evaporation Parameters
Water Balance during Monsoon (Based on LARGEST pit each year):
+ Rainfall = 100% of largest pit area × monsoon rainfall
− Evaporation = Pan evaporation × coefficient × evap area %
+ Rainfall = 100% of largest pit area × monsoon rainfall
− Evaporation = Pan evaporation × coefficient × evap area %
mm/year
% of annual
mm/day
0.6-0.8
% of largest pit
💧 GW Recharge (Outseepage) Parameters
Physics-Based GW Recharge Calculation:
When rainfall accumulates in pit, water level rises creating hydraulic head that drives outseepage.
When rainfall accumulates in pit, water level rises creating hydraulic head that drives outseepage.
multiplier (0.5-2.0)
meters
Open Pit Mines
Formula: Q = K × H × i × L
Where: K = Hydraulic Conductivity (m/day), H = Saturated thickness below water table (m), i = Hydraulic Gradient, L = Pit Perimeter (m)
R (Sichardt) = 3000 × s × √K (for reference only)
Where: K = Hydraulic Conductivity (m/day), H = Saturated thickness below water table (m), i = Hydraulic Gradient, L = Pit Perimeter (m)
R (Sichardt) = 3000 × s × √K (for reference only)
Results
Underground Workings
Formula: Goodman Q = 2πKHL/ln(2H/r)
Results
🌧️ Monsoon Water Balance
Net Inflow = Seepage + Rainfall − Evaporation − GW Recharge
Seepage (all pits)
+ Rainfall (100% largest pit)
− Evaporation
− GW Recharge
Net to Pump
⛏️ Open Pit Summary
| Year | Non-Monsoon (m³/day) | Monsoon (m³/day) | Non-Mon Vol (m³) | Monsoon Vol (m³) | Annual (Mm³) | Annual (m³/day) |
|---|
⛏️🌧️ Open Pit Monsoon Water Balance
Net = Seepage + Rainfall − Evaporation − GW Recharge
| Year | Pit | R (m) | Seepage (m³/day) | Seepage (m³) | + Rain (m³) | − Evap (m³) | − Recharge (m³) | Net (m³) | Net (m³/day) |
|---|
🚇 Underground Summary
| Year | Non-Monsoon (m³/day) | Monsoon (m³/day) | Non-Mon Vol (m³) | Monsoon Vol (m³) | Annual (Mm³) | Annual (m³/day) |
|---|
🌧️ Combined Monsoon Water Balance Summary
| Year | Largest Pit | Area (m²) | Perimeter (m) | R (m) | Seepage (m³/day) | Seepage (m³) | + Rain (m³) | − Evap (m³) | − Recharge (m³) | Net (m³) |
|---|
📊 Grand Total
| Year | Non-Monsoon (m³) | Monsoon Seepage (m³) | + Rain (m³) | − Evap (m³) | − Recharge (m³) | Total Annual (Mm³) |
|---|