Project Information
Aquifer Parameters
Seepage Formula: Q = T × i × L (Darcy's Law for linear flow)
Where: T = K × H (Transmissivity), i = Hydraulic Gradient (set in Config), L = Perimeter
Radius of Influence (R) calculated using Sichardt/Kusakin/Cooper-Jacob for reference
Where: T = K × H (Transmissivity), i = Hydraulic Gradient (set in Config), L = Perimeter
Radius of Influence (R) calculated using Sichardt/Kusakin/Cooper-Jacob for reference
m/day
constant
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)
Note: Non-Mon and Monsoon values in the results table represent daily rates (m³/day), not seasonal totals
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)
Note: Non-Mon and Monsoon values in the results table represent daily rates (m³/day), not seasonal totals
Results
Underground Workings
Formula: Goodman Q = 2πKHL/ln(2H/r)
Note: Non-Mon and Monsoon values in the results table represent daily rates (m³/day), not seasonal totals
Note: Non-Mon and Monsoon values in the results table represent daily rates (m³/day), not seasonal totals
Results
☀️ Non-Monsoon Water Balance
Net Inflow = Seepage (based on Q = K × H × i × L)
No rainfall or evaporation components during Non-Monsoon period
No rainfall or evaporation components during Non-Monsoon period
Seepage (all pits)
Net to Pump
🌧️ Monsoon Water Balance
Net Inflow = Seepage + Rainfall − Evaporation − GW Recharge
Seepage (all pits)
+ Rainfall (100% largest pit)
− Evaporation
− GW Recharge
Net to Pump
📊 Total Open Cast Seepage (Non-Monsoon + Monsoon)
☀️ UG Non-Monsoon Seepage
Goodman Equation: Q = 2πKH / ln(2H/r) × L × (1 − Grouting Eff%)
No rainfall or evaporation components during Non-Monsoon period
No rainfall or evaporation components during Non-Monsoon period
🌧️ UG Monsoon Seepage
Goodman Equation: Q = 2πKH / ln(2H/r) × L × (1 − Grouting Eff%)
📊 Total UG Seepage (Non-Monsoon + Monsoon)