Premium
Optimal timing and sizing of a conjunctive urban water supply and waste water system with nonlinear programing
Author(s) -
Mulvihill Michael E.,
Dracup John A.
Publication year - 1974
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr010i002p00170
Subject(s) - sizing , water quality , water supply , conjunctive use , schedule , environmental science , minification , time horizon , computer science , environmental engineering , waste management , mathematical optimization , engineering , mathematics , groundwater , aquifer , geotechnical engineering , art , ecology , visual arts , biology , operating system
A mathematical model of a conjunctively operated urban water supply and waste water system is formulated and applied to the city of Los Angeles. The objectives are (1) to minimize the cost of supplying water from several sources, including the provision for recycling reclaimed water, and (2) to determine the capacity expansion schedule of the water and waste water treatment processes. The water sources vary in quality, quantity, and cost. Constraints on water quality constituents as well as on quantity are included. The model formulated consists of the minimization of a concave objective function subject to linear constraints. A multilevel solution technique is developed to determine the minimum cost alternative for a selected planning horizon. The mathematical model is flexible in that it can be expanded to include additional water quality constituents, advanced waste water treatment processes, and variations in water quality standards.