General:
American Water Works Association
Boss International: For SMS and GMS and related documentation
Liina Ladon's Chemistry Tutoring Homepage at Towson University
UNC Chemistry Fundamentals Program
Concentration Units
USGS Surface-water quality and flow Modeling Interest Group (SMIG)
USGS Standard Methods for Stream Tracer Injection Studies
CACHE: Educational Resources for Chemical Engineers
S.O.S. Mathematics: Differential Equations
The Kalman Filter: Tutorials, References and Research
MATLAB Tutorials and related links:
Edward Neuman's MATLAB Tutorials
MATLAB Primer by Kermit Sigmon
MATLAB ODE Examples
HTML and PDF MATLAB Documentation from The Mathworks Inc.
MATLAB FAQ from the University of Texas
"The MATLAB ODE Suite" by L.F. Shampine and M.W. Reichelt, SIAM J. Scientific Computing, Vol. 18, No.1, pp. 1-22, Jannuary 1997.
How to export publication-quality graphs using MATLAB?
Excel Links:
Solving Differential Equations using Excel
Wang's Computer Methods in Chemical Engineering
Models:
CE-QUAL-W2 Model
The DieCast Model
Technical Presentation:
Graph Quality - Abominable Graphs
Good graphs for better business
Technical Presentation Tips