Recent results from a mathematical model of water pollution control in the Delaware Estuary.

The basic concepts of systems analysis and optimum (least-cost) water pollution control are presented. The equations utilized to describe the time and space variability of dissolved oxygen are presented in a systems analysis context, and their usefulness in this form is discussed. The application of the mathematical model to the control of dissolved oxygen in the Delaware Estuary is given. Recent computer solutions are illustrated, and the sensitivity of the least-cost dissolved oxygen improvement solutions to the rate of atmospheric reaeration is presented. [ABSTRACT FROM AUTHOR]