Sediment in Lateral & Groundwater Flow

SWAT+ allows the lateral and groundwater flow to contribute sediment to the main channel. The amount of sediment contributed by lateral and groundwater flow is calculated:

$sed_{lat}=\frac{(Q_{lat}+Q_{gw})*area_{hru}*conc_{sed}}{1000}$ 4:1.5.1

where $sed_{lat}$ is the sediment loading in lateral and groundwater flow (metric tons), $Q_{lat}$ is the lateral flow for a given day (mm H$_2$O), $Q_{gw}$ is the groundwater flow for a given day (mm H$_2$O), $area_{hru}$ is the area of the HRU (km$^2$), and $conc_{sed}$ is the concentration of sediment in lateral and groundwater flow (mg/L).

Table 4:1-8: SWAT+ input variables that pertain to sediment lag calculations.

Variable Name	Definition	Input File
LAT_SED	$conc_{sed}$: Concentration of sediment in lateral and groundwater flow (mg/L)	.hru