Seepage

The volume of water lost by seepage through the bottom of the pothole on a given day is calculated as a function of the water content of the soil profile beneath the pothole.

$V_{seep}=240*K_{sat}*SA$ if $SW<0.5*FC$ 8:1.3.7

$V_{seep}=240*(1-\frac{SW}{FC})*K_{sat}*SA$ if $0.5*FC \le SW <FC$ 8:1.3.8

$V_{seep}=0$ if $SW \ge FC$ 8:1.3.9

where $V_{seep}$ is the volume of water lost from the water body by seepage (m$^3$ H$_2$O), $K_{sat}$ is the effective saturated hydraulic conductivity of the 1st soil layer in the profile (mm/hr), $SA$ is the surface area of the water body (ha), $SW$ is the soil water content of the profile on a given day (mm H$_2$O), and $FC$ is the field capacity soil water content (mm H$_2$O). Water lost from the pothole by seepage is added to the soil profile.