The volume of water lost by seepage through the bottom of the reservoir on a given day is calculated:
Vseep​=240∗Ksat​∗SA 8:1.1.7
where Vseep​ is the volume of water lost from the water body by seepage (m3 H2​O), Ksat​ is the effective saturated hydraulic conductivity of the reservoir bottom (mm/hr), and SA is the surface area of the water body (ha).