Aquatox for Windows - A Modular Fate and Effects Model for Aquatic Ecosystems Release 1.1 - Volume 3: Model Varification Reports Addendum

The ecosystem model AQUATOX is one of the few general ecological risk models that represents the combined environmental fate and effects of toxic chemicals. The model also represents conventional pollutants, such as nutrients and sediments, and considers several trophic levels, including attached and planktonic algae, submerged aquatic vegetation, several types of invertebrates, and several types of fish. It has been implemented for streams, small rivers, ponds, lakes, and reservoirs. The AQUATOX model is described in these documents. Volume 1: User's Manual describes the usage of the model. Volume 2: Technical Documentation provides detailed documentation of the concepts and constructs of the model so that its suitability for given applications can be determined. Volume 3: Model Validation Reports presents three model varification studies for different environmental stressors and in different waterbody types. The validations were performed using test versions of the model which had only very minor differences from Release Version 1; the specific test version is noted in the title of each report. This Addendum to Volume 3 presents a calibration and validation study for the use of AQUATOX to simulate periphyton in streams. Constructs were added to AQUATOX in order to better represent periphyton dynamics; these are described in the text.