1.061 / 1.61 Transport Processes in the Environment

Fall 2004

Dye Study photograph of Lower Bull Run River of Oregon.
Dye Study photograph of the Lower Bull Run River of Oregon. (Photograph courtesy of Prof. Scott A. Wells, Portland State University.)

Course Highlights

This course features ten modules in the lecture notes section that cover topics such as diffusion, conservation of mass, and boundary conditions. Each module comprises notes about the theory, animated simulations, and example problems. There are example problems in the assignments section as well.

» Watch a video introduction featuring the course instructor.
(RM - 56K) (RM - 80K) (RM - 220K)

Course Description

This class serves as an introduction to mass transport in environmental flows, with emphasis given to river and lake systems. The class will cover the derivation and solutions to the differential form of mass conservation equations. Class topics to be covered will include: molecular and turbulent diffusion, boundary layers, dissolution, bed-water exchange, air-water exchange and particle transport.

Special Features

Technical Requirements

RealOne™ Player software is required to run the .rm files found on this course site. Java®plug-in software is required to run the Java® files found on this course site.

*Some translations represent previous versions of courses.

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Prof. Heidi Nepf

Course Meeting Times

Two sessions / week
1.5 hours / session


Undergraduate / Graduate


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