Two significant, interrelated water resources problems are: (1) efficiently salvaging and reusing effluent water in order to augment limited water supplies; and (2) economically managing and treating wastewater to meet water quality standards. Using systems engineering and operations research techniques, the report focuses on the optimal management and use of water of impaired quality in a water resources system, including utilization or irrigation return flows and other poor quality water, water quantity and quality management systems, and wastewater reclamation opportunities. The study develops a mathematical programming transportation or transshipment model formulated for the Lower Jordan River Basin in Utah. The model incorporated all “possible” water resources (including sequential and recycled reuse of water)to supply spatially separated multi-sector water users considering non-linear costs with economies of scale for water supply and wastewater treatment, temporal aspects of seasonality and stochastic nature of water supply and demand, and the system effects of higher wastewater treatment levels. The results of the model runs give specific allocations of waste from the available sources to meet use sector requirements over a planning horizon from 1975 to 2020. The total minimum cost of water supply and wastewater treatment allocation is reduced by considering seasonality of water requirements. Stochasticity of supply and water treatment requirements increase total allocation costs. The comparison of results from the model can be used to analyze the interdependence of water supply, water pollution control, options for water salvage and reuse in order to better plan public investment in water and wastewater management facilities.
Bishop, A. Bruce; Narayanan, Rangesan; Pratishthananda, Suravuth; Klemetson, Stanley L.; and Grenney, William J., "Optimization of Water Allocation, Wastewater Treatment, and Reuse Considering Nonlinear Costs, Seasonal Variations, and Stochastic Supplies" (1975). Reports. Paper 601.