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.

Vseep=240KsatSAV_{seep}=240*K_{sat}*SA if SW<0.5FCSW<0.5*FC 8:1.3.7

Vseep=240(1SWFC)KsatSAV_{seep}=240*(1-\frac{SW}{FC})*K_{sat}*SA if 0.5FCSW<FC0.5*FC \le SW <FC 8:1.3.8

Vseep=0V_{seep}=0 if SWFCSW \ge FC 8:1.3.9

where VseepV_{seep} is the volume of water lost from the water body by seepage (m3^3 H2_2O), KsatK_{sat} is the effective saturated hydraulic conductivity of the 1st soil layer in the profile (mm/hr), SASA is the surface area of the water body (ha), SWSW is the soil water content of the profile on a given day (mm H2_2O), and FCFC is the field capacity soil water content (mm H2_2O). Water lost from the pothole by seepage is added to the soil profile.

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