User and Parameter Selection Guide

API Publication 4760
LNAPL Distribution and Recovery - Volume 2

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Overview
This document provides user and parameter selection guidance for application of the American Petroleum Institute LNAPL Distribution and Recovery Model (LDRM).  Volume 1 of this 2 volume set provides background information on distribution and recovery of petroleum hydrocarbon liquids in porous media, and is intended as an LNAPL primer. 

Contents
Section 1 of this volume discusses earlier releases of the API LNAPL Recovery Model and describes the new features of the current release of the model software application that is associated with this document series.  Model scenarios (wells and trenches) are also described. 

Section 2 is a detailed guide to use of the LDRM software application.  Workspace setup, program initiation, and data entry are described.  The various menu items which provide the basic navigation tools through the application are discussed.  Model options are described and model output using graphical screen output and text files are presented. 

Section 3 provides background information on model conceptualization, parameter selection (and limitations), and problem solving using the LDRM.  Four example problem applications are presented which highlight model use, parameter estimation using the API LNAPL Parameters Database, and limitations of scenario-based models.  An appendix presents results from an independent analysis of model performance.

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