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 is the volume of the sediment layer (m), is the surface area of the water body (m), is the depth of the active sediment layer (m). Pesticide removed from the sediment layer by resuspension is added to the water layer.