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Consumptive Use of Irrigation Water in Wyoming


Increasing demands for water in the state and nation require water resources planning to evaluate water needs and alternatives of development. As a portion of an overall program of planning, there must be more efficient utilization of water resources. To assist in the planning effort and to provide a guide for efficient agricultural use, this publication contains estimates of the consumptive use of irrigation water by agricultural crops throughout Wyoming.

The study represents a badly needed updating of consumptive use estimates prepared by Byron R. Tomlinson of the Soil Conservation Service published by the University of Wyoming Agricultural Experiment Station as Bulletin 303 in 1951. The Wyoming Water Planning Program, under the general supervision of Floyd A. Bishop and other water resource planning and conservation agencies, is in need of this type of information on a statewide basis. This report should assist all persons needing irrigation water use data. Using this information, the consumption of irrigation water can be estimated for most areas in Wyoming, and when the field irrigation efficiency and conveyance losses are known, the diversion requirement for irrigation can be estimated.

The consumptive use estimates contained herein are for average climatic conditions. When temperature, precipitation and other climatic factors are above or below average during the growing season, the consumptive use will be somewhat higher or lower for that season than the value given.

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