The application of a non-linear programming algorithm to the problem of optimal water quality control in an estuary is described. A mathematical model gives the solution to the general mixed case of at-source treatment, regional treatment plants, and by-pass piping. The non-linear algorithm is developed in considerable detail and a sample problem is worked out. Detailed results are presented for a pilot problem to illustrate the method of solution. Actual data from the Delaware Estuary is used to solve a large scale problem and the solution is given. (Author)

"Program #16110 FPX, Formerly WP-01210." "August, 1970." Includes bibliographical references. "This report was submitted in fulfillment of Grant No. 16110 FPX between the Federal Water Quality Administration and the University of California, Los Angeles, directed by Dr. Glenn W. Graves, assisted by Andrew B. Whinston and Gordon B. Hatfield."--Abstract.

This report is an application of a non-linear programming algorithm to the problem of optimal water quality control in an estuary. The mathematical model that was developed gives the solution to the general mixed case of at-source treatment, regional treatment plants, and by-pass piping. The non-linear algorithm is developed in considerable detail and a sample problem is worked out. Detailed results are presented for a pilot problem to illustrate the method of solution. Actual data from the Delaware Estuary is used to solve a large scale problem and the solution is given. The results indicate that a regional treatment system for the Delaware Estuary is superior, in terms, of total cost, to other proposed schemes.