Efficiency and Equity in Management of Agricultural Water Supplies

摘要

This quadratic programming model is an irrigation orientated extension of a model developed by Adams, King, and Johnston and considers a possible 370 production activities for nine field crops and 28 seasonal vegetable crops. The state of California is divided into 14 production regions each with two irrigable soil types. The regions are based on homogeneity of climate, soil type, and water costs and availability. Regional production activities are constrained by the physical availability of land, water, and, in a few cases, by processing capacity. Maximum statewide production is also constrained for all commodities. Data on yields and production costs are given. Perennial crops are not included in the model, but the available amounts of ground and surface water in the model were adjusted regionally to allow for perennial requirements. The model's objective function of maximizing consumers' surplus and producers' quasi-rent yields the optimum crop mix subject to constrained amounts of land, energy, and water.