Burial

Pesticide in the sediment layer may be lost by burial. The amount of pesticide that is removed from the sediment via burial is:

$pst_{bur}=v_b*SA*\frac{pst_{lksed}}{V_{tot}}$ 8:4.2.14

where $pst_{bur}$ is the amount of pesticide removed via burial (mg pst), $v_b$ is the burial 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$^3$).

Table 8:4-2: SWAT+ input variables related to pesticide in the sediment.

Variable Name	Definition	Input File
LKPST_KOC	$K_d$: Pesticide partition coefficient (m$^3$/g)	.lwq
LKSPST_REA	$k_{p,sed}$: Rate constant for degradation or removal of pesticide in the sediment (1/day)	.lwq
LKPST_RSP	$v_r$:Resuspension velocity (m/day)	.lwq
LKSPST_ACT	$D_{sed}$: Depth of the active sediment layer (m)	.lwq
LKPST_MIX	$v_d$: Rate of diffusion or mixing velocity (m/day)	.lwq
LKSPST_BRY	$v_b$: Pesticide burial velocity (m/day)	.lwq