Computer modeling of the diurnal oxygen levels in a stillwater aquaculture pond

A dynamic model of dissolved oxygen behavior in a stillwater aquaculture pond is presented. Using theories and principles that have been established for aerobic waste-water treatment ponds and shallow lakes and reservoirs, equations were developed to describe the short-term dissolved oxygen fluctuations of an aquaculture pond. Components considered in this model include the consumption and production of oxygen by phytoplankton, fish, detritus, and the process of reaeration. Factors affecting these components can be specified by the user; these include meteorologic and geographic data, and phytoplankton, fish, and detrital characteristics. After comparing the model to field data and analyzing the sensitivity of its components, areas of research which may have an impact on pond management are identified.