An identification study of the feed-back of soluble organic matter from the benthic sludge in facultative ponds is described, based on field data reported for the New Mexico pond system in the USA. The study employed recursive estimation techniques to aid the identification of appropriate model structures. Model development progressed from the analysis of a simple non-reactive system to one incorporating two sub-systems, namely the planktonic region and the benthic region. It was found that the inclusion of a temperature-related feed-back term produced good model results while the temperature-corrected decay rate constant remained constant over time. The magnitude of the feed-back term would appear to be equal to the incoming load in the hottest months of the year. The implications for performance evaluation and design are discussed.

This content is only available as a PDF.
You do not currently have access to this content.