Welcome to the Columbia University Department of Earth & Environmental Engineering online modeling resource. Below you will find descriptive links for all of the programs maintained in our Environmental Modeling Software Library, and also examples of curricular applications using these models. The modeling library itself is located in our Computer Laboratory in room 827 Mudd, which houses 14 networked PCs with site licenses for each model. The library serves as a resources for students and faculty in the Deapartment of Earth and Environmental Engineering, and can be made available upon request to other members of the Columbia community.

The "Model Description" links offer brief descriptions of each model adapted from users manuals and other documentation provided by the models' developers. These descriptions exist to help users determine the applicability of each model to their needs, and to get started in using the model. While these overviews may describe what is required to run the model and what types of outputs to expect, they are not intended to be comprehensive how-to tutorials. Links to each model’s web site are also provided, to access more detailed information, and also downloads for freeware programs.

The "Curricular Applications" links each describe an exercise from a course that makes use of one of the models, and how different concepts are illustrated in the exercises. They serve as examples of how these modeling tools are incorporated into our undergraduate environmental engineering curriculum.

This Environmental Modeling Software Library has been developed with support from the National Science Foundation.

Model Description	Model Purpose	Model Website
ArcGIS Desktop	Geographic information sofware for mapping
BIOSCREEN	Model for the simulation of natural attenuation of dissolved hydrocarbons at petrolium spill sites	BIOSCREEN
Cantera	Software for problems involving chemically reacting flows
Gaseq	Chemical equilibrium program
Groundwater Modeling System (GMS)	Comprehensive groundwater modeling software
Hec-GeoHMS	Hydrogeologic modeling system
Hec-HMS	Hydrologic modeling system
Interactive Groundwater (IGW)	Interactive groundwater modeling system
MATLAB	High-performance interface for technical computing and modeling
Qual2K	River and stream water quality and process interaction model
Storm Water Management Model (SWMM)	Dynamic runoff simulation modeling
WaterCAD	Interface for designing and planning hydrologic systems	WaterCAD
Water Evaluation and Planning System (WEAP)	Tool for integrated water resources planning and policy analysis