Laserfiche WebLink
RISKPRO'S SESOIL for Windows User's Guide <br /> The mass balance equation is <br /> O(t-1) +(t) = T(t) +R(t) +M(t) (6) <br /> where: <br /> 0(t-1) = the amount of pollutant originally in the soil compartment at time t-1 (/cg/cm2) <br /> I(t) = the amount of pollutant entering the soil compartment during a time step <br /> (µg/cm2) <br /> T(t) = the amount of pollutant transformed within the soil compartment during the <br /> time step (µg/cm) <br /> I R(t) = the amount of pollutant remaining in the soil compartment at time t (µg/cm2) <br /> M(t) = the amount of pollutant migrating out of the soil compartment during the time <br /> step (µg/cm2) <br /> The fate of theP ollutant in the soil column includes both transport and transformation processes, <br /> which depend on the chemical's partitioning among the three phases soil air, soil moisture, and <br /> soil solids. The three phases are assumed to be in equilibrium with each other at all times (see <br /> Diagram 2), and the partitioning is a function of user-supplied chemical-specific partition <br /> coefficients and rate constants Once the concentration in one phase is known, the <br /> concentrations in the other phases can be calculated The pollutant cycle of SESOIL is based <br /> on the chemical concentration to the soil water That is, all the processes are written in terms <br /> of the pollutant concentration in soil water, and the model aerates on the soil moisture <br /> concentration until the system defined by Eq (6) balances <br /> I <br /> Page 17 <br />