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An economic-engineering optimization model of California's major water supply system is presented. The model's development , calibration, limitations, and results are reviewed. The major methodological conclusions are that large-scale water resources optimization models driven by economic objective functions are both possible and practical; deterministic(More)
Economically optimal operational changes and adaptations for California's water supply system are examined for a dry form of climate warming (GFDL CM2.1 A2) with year 2050 water demands and land use. Economically adaptive water management for this climate scenario is compared to a similar scenario with the historical climate. The effects of population(More)
The ability of California's water supply system to adapt to long-term climatic and demographic changes is examined. Two climate warming and a historical climate scenario are examined with population and land use estimates for the year 2100 using a statewide economic-engineering optimization model of water supply management. Methodologically, the results of(More)
The development of monthly economic loss functions is presented for major urban water users throughout California. These loss functions can be applied to drought or regulatory impact studies for urban water supplies or as economic performance indicators for regional or local water supply reliability simulation or integrated resource planning studies. The(More)
This paper presents results of a large-scale economic-engineering optimization model of California's water supply system. The results of this 4-year effort illustrate the value of optimization modeling for providing integrated information needed to manage a complex multipurpose water system. This information includes economic benefits of flexible(More)
[1] The potential and limitations of conjunctive use of surface and groundwater are explored for southern California's water supply system. An economic-engineering network flow optimization model, CALVIN, is used to analyze the economic and reliability benefits from different conjunctive use alternatives. Flexible management of additional conjunctive use(More)
6 Household demand for improved sanitation in developing countries is an important 7 social and behavioral process with implications for public health, sanitation policy and 8 planning, and sanitation design and technology development. This paper develops a 9 behavioral approach to assess household demand for improved sanitation in Ghana. Adoption 10(More)
This paper explores the potential and limitations for Southern California water markets using an economic-engineering network flow optimization model, CALVIN. CALVIN is used to estimate how a market would affect overall Southern California water use, to preliminarily assess the economic benefit of more flexible water allocation policies, and to explore the(More)
Nearly half the world's population lacks basic sanitation to protect their environment from human fecal contamination. Building a latrine is the first step on the sanitation ladder in developing countries where a majority of the population defecates in open or public areas. Public health programs to improve sanitation have consistently framed promotional(More)