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Improved management of water resources is one means for alleviating deficiencies in water supply. One promising management technique is integration of ground water and surface water supplies and storage unites, or planned conjunctive use. In order to assess the value of this technique in relations to a particular area or basin, it is necessary to look at the economic, hydrologic, and legal system as a whole. A planning procedure is developed which will enable feasibility to be determined at a minimum cost.

The procedure consists of determining legal constraints, estimating benefits which will accrue to additional water, estimating the quantity of water which is physically available, and determining the costs of supply. Extension of the feasibility study is discussed in terms of systems analysis and linear programming. An example of the use of the procedure in the Little Lost River basin (Idaho) is given.