basins,
Python
K_s = saturated hydraulic conductivity (m / s) K_i = initial hydraulic conductivity (m / s) (typically much less than Ks) θ_s = soil water content at ψ=0 (unitless) (typically set to the porosity, φ) θ_i = initial soil water content (unitless) G = capillary length scale (meters) = integral over all ψ of K(ψ) / K_s = (almost always between ψ_B and 2*ψ_B) P = precipitation rate (mm / sec) M = snowmelt rate (mm / sec)
The behavior of this component is controlled with a configuration (CFG) file, which may point to other files that contain input data. Here is a sample configuration (CFG) file for this component:
Method code: 0 Method name: Green_Ampt Number of layers: 1 Time step: Scalar 60.0000000 (sec) Ks: Scalar 0.00000720 (m/s) Ki: Scalar 0.00000010 (m/s) qs: Scalar 0.48500001 (none) qi: Scalar 0.37580763 (none) G: Scalar 0.72400000 (m) Closest soil_type: silt_loam Save grid timestep: Scalar 60.00000000 (sec) Save v0 grids: 0 Case5_2D-v0.rts (m/s) Save I grids: 0 Case5_2D-I.rts (m) Save pixels timestep: Scalar 60.00000000 (sec) Save v0 pixels: 0 Case5_0D-v0.txt (m/s) Save I pixels: 0 Case5_0D-I.txt (m)
f_c = K_i + ((K_s - K_i) * (F + J) / F) = infiltrability (m / sec) (max infiltration rate) = K_s + (J / F) * (K_s - K_i) = infiltrability (m / sec) (max infiltration rate) J = G * (θ_s - θ_i) = a quantity used in previous equation (meters) v_0 = min((P + M), f_c) = infiltration rate at surface (mm / sec) (K_s < (P + M)) = (P + M) = infiltration rate at surface (mm / sec) (K_s > (P + M)) F = ∫ v_0(t) d_t, (from times 0 to t) = cumulative infiltration depth (meters) (vs. I' in Smith (2002)
This part will be filled out by CSDMS staff
TopoFlow, TopoFlow-Meteorology, TopoFlow-Channels-Diffusive_Wave, TopoFlow-Channels-Dynamic_Wave, TopoFlow-Channels-Kinematic_Wave, TopoFlow-Snowmelt-Degree-Day, TopoFlow-Snowmelt-Energy_Balance, TopoFlow-Evaporation-Energy_Balance, TopoFlow-Evaporation-Priestley_Taylor, TopoFlow-Evaporation-Read_File, TopoFlow-Saturated_Zone-Darcy_Law,
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