Resuspension

Pesticide in the sediment layer is available for resuspension. The amount of pesticide that is removed from the sediment via resuspension is:

$pst_{rsp,wtr}=v_r*SA*\frac{pst_{lksed}}{V_{tot}}$ 8:4.2.10

where $pst_{rsp,wtr}$ is the amount of pesticide removed via resuspension (mg pst), $v_r$ is the resuspension velocity (m/day), $SA$ is the surface area of the water body (m$^2$), $pst_{lksed}$ is the amount of pesticide in the sediment (mg pst), and $V_{tot}$ is the volume of the sediment layer (m$^3$). The volume of the sediment layer is calculated:

$V_{tot}=SA*D_{sed}$ 8:4.2.11

where $V_{tot}$ is the volume of the sediment layer (m$^3$), $SA$ is the surface area of the water body (m$^2$), $D_{sed}$ is the depth of the active sediment layer (m). Pesticide removed from the sediment layer by resuspension is added to the water layer.