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i <br /> RISKPRO'S SESOIL for Windows User's Guide <br /> i 1 . INTRODUCTION <br /> The Seasonal Soil Compartment model (SESOIL) is a one-dimensional vertical transport model <br />' for the unsaturated soil zone It estimates pollutant concentrations in the soil profile following <br /> introduction via direct application and/or interaction with other media (i e. deposition from air) <br /> Processes simulated in SESOIL are categorized in three cycles - hydrologic, sediment, and <br /> Ipollutant The hydrologic cycle includes rainfall, surface runoff, infiltration, soil water content, <br /> evapotranspiration, and groundwater runoff. The sediment cycle includes sediment washload <br /> as a result of rainstorms (i.e, soil erosion that results from surface runoff) The pollutant cycle <br />' includes convective transport, volatilization, adsorption/desorption, and degradation/decay The <br /> SFSOIL model describes water transport, sediment transport, pollutant fate, pollutant migration <br />' to groundwater, and soil quality <br /> SESOIL can be used as a screening-level model, utilizing fewer soil, chemical, and <br />' meteorological values as input than most other similar models Output of the SESOIL model <br /> includes time-varying pollutant concentrations at various soil depths and pollutant loss from the <br /> unsaturated zone in terms of surface runoff, percolation to the groundwater, volatilization, and <br />' degradation SESOIL can be used as an assessment tool in performing exposure assessments. <br /> The purpose of this document is to provide an up-to-date users manual for SESOIL as it is used <br /> in the RISKPRO Windows system The model in RISKPRO was recently enhanced by David <br /> Hetrick to allow the user to specify the initial adsorbed-soil concentrations at any sublayers. The <br /> new model also includes the option of estimating the average concentrations in the groundwater <br />' This user's guide provides guidance on the use of the use of the SESOIL Windows interface and <br /> g P <br /> illustrates its use with two example runs This guide is divided into seven sections Section 2 <br />' gives you an overview of the SESOIL model and how SESOIL can be used as an assessment <br /> tool Section 3 discusses the assumptions and equations used in the model Section 4 describes <br /> the Windows implementation of the SESOIL interface, including descriptions of the screen <br />' sequences and the link between SESOIL and AT123D Section 5 provides you with the <br /> minimum requirements and loading information for Windows SESOIL Section 6 describes the <br /> tinformation necessary to use the SESOIL interface, including <br /> + Accessing an Existing File or Opening a New File <br />' • SESOIL File Naming and Numbering Conventions <br /> • Saving Input Files <br /> • Accessing Chemical Files and Databases in SESOIL <br />' • Setting Up a Default Editor for Viewing Output Files <br /> 0 Submitting an Input File to the Model <br /> • SESOIL Windows Interface Commands and Function Keys <br />' • Import File Option in SESOIL <br />' Page 1 <br />