The highly user-interactive CORMIX system is implemented on IBM-DOS compatible
microcomputers, utilizes a rule-based systems approach to data input and processing, and
consists of three subsystems:
(a) CORMIX1 for the analysis of submerged single port discharges,
(b) CORMIX2 for the analysis of submerged multiport diffuser discharges and
(c) CORMIX3 for the analysis of buoyant surface discharges.
Without specialized training in hydrodynamics, users can make detailed predictions of
mixing zone conditions, check compliance with regulations and readily investigate the
performance of alternative outfall designs.
The basic CORMIX methodology relies on the assumption of steady ambient conditions. However, recent versions also contain special routines for the application to highly unsteady environments, such as tidal reversal conditions, in which transient recirculation and pollutant build-up effects can occur.
In addition, several post-processing options are available. These are CORJET (the Cornell Buoyant Jet Integral Model) for the detailed analysis of the near-field behavior of buoyant jets, FFLOCATR (the Far-Field Plume Locator) for the far-field delineation of discharge plumes in non-uniform river or estuary environments, and CMXGRAPH, a graphics package for plume plotting.
Several factors provided the original impetus for system development including:
(a) the considerable complexity of mixing processes in the aquatic environment, resulting from the great diversity of discharge and site conditions and requiring advanced knowledge in a specialized field of hydrodynamics;
(b) the failure of previously existing models (e.g. the U.S. EPA plume models (4) originally developed for municipal discharges in deep coastal waters) to adequately predict often routine discharge situations, especially for more shallow inland sites;
(c) the issuance in 1985 by the U.S. EPA of additional guidelines (1) for the permitting of toxic aqueous discharges, placing yet another burden on both applicants and regulators in delineating special zones for the initial mixing of these substances; and
(d) the availability of new computer methods, so-called expert systems, for making accessible to the user, within a simple personal computing environment, the expert's knowledge and experience in dealing with complex engineering problems.
Sources of the Abstract:
Gerhard H. Jirka, Robert L. Doneker, and Steven W. Hinton 1996: User's Manual For CORMIX: A Hydrodynamic mixing zone model and decision support system for pollutant discharges into surface waters. and
EPA-CEAM page (Jnue 18,1997)
see also: Orgeon Graduate Istitute, CORMX Home Page: http://steens.ese.ogi.edu/