Evaluation of Irrigation Planning Decisions

Abstract

A method is developed to determine optimal irrigation strategies for a single season using crop production functions which incorporate physically based coefficients. The relationship of yield to evapotranspiration is used to develop the yield-irrigation function. The physical parameters used in the production function can be determined from field measurements or various types of computer simulation. Using this approach, the optimal irrigated area and depth of water to apply can be related to prices, costs, and physical parameters. This produces a more general solution than commonly used production functions that depend on limited experimental results. The optimal irrigation depth and irrigated area can be determined for either land or water limiting conditions. The analysis also allows consideration of different irrigated and dryland crops. Three examples are analyzed to illustrate the use of the technique and to develop some general guidelines.

Deficit Irrigation Management of Maize in the High Plains Aquifer Region: A Review

“…Various economic decision frameworks have been developed to assist with managing limited water resources (Martin et al 1989;English 1990;Amosson et al 2018). Various economic decision frameworks have been developed to assist with managing limited water resources (Martin et al 1989;English 1990;Amosson et al 2018).…”

Evidence Supporting Cap and Trade as a Groundwater Policy Option for Reducing Irrigation Consumptive Use1

“…The potential gains from allowing trades between Well A and Well B lands were estimated using Water Optimizer, which is a decision support tool for irrigators developed at the University of Nebraska (http://real.unl.edu/h20/). This management tool is a nonlinear optimization program which chooses the profit maximizing irrigation plan for a set of field and economic conditions, subject to land and water availability constraints (Martin et al , 1989). The program determines how much land to dedicate to each crop and how much water should be applied to each crop in a normal weather year.…”

Irrigação plena e com déficit em pimenta cv. Tabasco em ambiente protegido

“…Pois sabe-se que a quantidade de água economizada com irrigação sob restrição economiza água que pode ser usada para irrigar uma área adicional, aumentando a receita liquida da propriedade rural. Muitas pesquisas têm concluído que o déficit de irrigação pode aumentar a receita liquida das fazendas (ENGLISH, 1990;MARTINS;GILLEY;SUPPLA, 1989;FRIZZONE et al, 2001;ALI et al, 2007) Sabe-se que a água é essencial ao crescimento das células e manutenção da turgescência e sua limitação provoca alterações no comportamento vegetal cuja irreversibilidade depende do genótipo, da duração, da severidade e do estádio de desenvolvimento da cultura (SANTOS; CARLESSO, 1998).…”