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Abstract
A Multimedia Agricultural Model (MAM) for predicting the fate and transport of Non- Volatile Organic Chemicals (NVOCs) in the agricultural environment was presented. It is an expanded and modified version of the three compartmental model introduced by Batiha and co-authors in 2007, which is an aquivalence-based level IV. MAM considered five environmental compartments to include the air, water, soil, sediment and vegetation. It calculates the complete steady-state mass budgets for the air, water and particulate organic carbon between the model compartments. MAM compartments were connected by advective and intermedia transport processes. Degradation can take place in every compartment. The mass balances for each of the compartments result in a system of five differential equations, solved numerically to yield estimates of concentrations, masses, transport fluxes and reaction rates as a function of time. All the equations required for MAM calculations were provided.
Highlights
It is becoming evident that vegetations play an important role in the environmental fate of many organic compounds[1,2,3,4]
This phenomenon was explained by Horstmann et al.[11] that the elevated levels of organic chemicals present in forest soils compared to agricultural soils are due to atmospheric deposition processes
NonVolatile Organic Chemicals (NVOCs) transfer fluxes: Chemical movement in the environment is strongly associated with the movement of air, water and organic matter[19]
Summary
It is becoming evident that vegetations play an important role in the environmental fate of many organic compounds[1,2,3,4]. McLachlan et al.[13] have divided the dry deposition of organic chemicals to vegetations into three categories according to the volatility of the compound. The water-sediment interface is an active layer, which typically consists of 95% particles and is often highly in organic nature. These compartments are linked by up to eight transport processes from i to j compartment (Dij, m3 h−1). NVOCs can be lost by advection of air and water out of the model domain (DAUT and DWUT, m3 h−1)
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