Project Information
Aquifer Parameters
Open Cast: Q = K × H × i × L (Darcy's Law for linear flow) |
Underground: Q = K × i × A (Darcy's Law for surface area seepage)
Where: K = Hydraulic Conductivity (m/day), H = Saturated Thickness (m), i = Hydraulic Gradient, L = Perimeter, A = Wetted Surface Area
Where: K = Hydraulic Conductivity (m/day), H = Saturated Thickness (m), i = Hydraulic Gradient, L = Perimeter, A = Wetted Surface Area
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 — Year × Season
Formula: Q = K × H × i × L
Depth = Bench From − Bench To (auto) | Sat. Thickness (H) = Depth − WT (auto)
Non-Monsoon: Enter L, W, WT | Monsoon: L & W auto-copied from Non-Mon; only WT editable
Depth = Bench From − Bench To (auto) | Sat. Thickness (H) = Depth − WT (auto)
Non-Monsoon: Enter L, W, WT | Monsoon: L & W auto-copied from Non-Mon; only WT editable
Underground Workings — Year × Season
Formula: Q = K × i × A (Darcy — Surface Area)
Length = |Level From − Level To| (auto) | Shape: Cylindrical (A=π×D×L) or Cuboid (A=2(W+H)×L)
Non-Monsoon: Enter Dia/W/H, Grouting%, Head | Monsoon: Dimensions & Grouting auto-copied; only Head editable
Length = |Level From − Level To| (auto) | Shape: Cylindrical (A=π×D×L) or Cuboid (A=2(W+H)×L)
Non-Monsoon: Enter Dia/W/H, Grouting%, Head | Monsoon: Dimensions & Grouting auto-copied; only Head editable
☀️ 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
Q = K × i × A (Darcy's Law — Surface Area)
No rainfall or evaporation components during Non-Monsoon period
No rainfall or evaporation components during Non-Monsoon period
🌧️ UG Monsoon Seepage
Q = K × i × A (Darcy's Law — Surface Area)
📊 Total UG Seepage (Non-Monsoon + Monsoon)