Burial

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

$pst_{bur}=\frac{v_b}{D_{sed}}*pst_{rchsed}$ 7:4.2.13

where $pst_{bur}$ is the amount of pesticide removed via burial (mg pst), $v_b$ is the burial velocity (m/day), $D_{sed}$ is the depth of the active sediment layer (m), and $pst_{rchsed}$ is the amount of pesticide in the sediment (mg pst).

Table 7:4-2: SWAT+ input variables related to pesticide in the sediment.

Variable Name	Definition	Input File
CHPST_KOC	$K_d$: Pesticide partition coefficient (m$^3$/g)	.swq
SEDPST_REA	$k_{p,sed}$: Rate constant for degradation or removal of pesticide in the sediment (1/day)	.swq
CHPST_RSP	$v_r$: Resuspension velocity (m/day)	.swq
SEDPST_ACT	$D_{sed}$: Depth of the active sediment layer (m)	.swq
CHPST_MIX	$v_d$: Rate of diffusion or mixing velocity (m/day)	.swq
SEDPST_BRY	$v_b$: Pesticide burial velocity (m/day)	.swq