Technical Bulletin No. 0391: The Mathematical Water Quality Model Qual-II and Guidance for Its Use – Revised Version

This technical bulletin improved upon earlier descriptions of Qual-II model (QL2SMG version) and provided more appropriate guidance for its use. Readers were advised to discontinue use of Stream Improvement Technical Bulletin No. 338, which was taken out of print; this technical bulletin reflected the documentation element of the National Council's MWQM study program. Other key elements in the program include parameter estimation and model validation.