Following is the appearance of the Soil Layers tab of the Catchment Coefficients dialog and Hydrology selected:
Following is a description of the hydrology parameters associated with Soil Layers. Refer to the main Catchment Coefficients page for information on other categories of coefficients. To save the changes made when closing this dialog, click OK. To ignore changes, click Cancel.
Area is the surface area of each soil layer. (>0 sq m)
Thickness is the thickness of each soil layer. (>0 cm)
Initial Moisture is the initial volume fraction of water in each soil layer. (0 – 0.6, unitless)
Field Capacity is the volume fraction of water in each soil layer which does not flow out of the soil. (0 – 0.4, unitless)
Saturation Moisture is the maximum volume fraction of water in each soil layer. (0.2 – 0.6, unitless)
Horizontal Conductivity is the horizontal hydraulic conductivity of each soil layer. (>0 cm / d)
Vertical Conductivity is the vertical hydraulic conductivity of each soil layer. (>0 cm / d)
Root Distribution is the fraction of root distribution for each layer. (0.0 – 1.0)
Density is the density of soil (>0 g/cm3)
Tortuosity is the soil tortuosity, defined as the ratio of effective path length of water through a soil sample to length of the sample (normally 10)