In the Mexico-U.S. borderlands the social uses of water are changing as the focus of the economy shifts slowly from agriculture to industry and services. This article discusses the changes to the physical and social infrastructures erected during the first half of the twentieth century to support a regime of accumulation based in irrigated cotton. Infrastructure is proposed as a particularly us...

In gravity irrigation, how water is distributed in the soil profile makes it necessary to study and develop methodologies model process of infiltration redistribution. this work, a shown simulate advancing front border irrigation based on one dimensional equations Barré de Saint-Venant for surface flow equation Green Ampt porous medium. The solutions were obtained numerically using finite diffe...

Large quantities of water are consumed by irrigated crops and riparian vegetation in western U.S. irrigation districts. Remote sensing methods for estimating evaporative water losses by soil and vegetation (evapotranspiration, ET) over wide river stretches are needed to allocate water for agricultural and environmental needs. We used the Enhanced Vegetation Index (EVI) from MODIS sensors on the...

infiltration is a complex process that changed by initial moisture and water head on the soil surface. the main objective of this study was to estimate the coefficients of infiltration equations, kostiakov-lewis, philip and horton, and evaluate the sensitivity of these equations and their coefficients under various initial conditions (initial moisture soil) and boundary (water head on soil surf...

Climate change has brought increased temperatures and decreased rainfall on a global scale; however, population growth requires greater volumes of water food each year that must be supplied in one way or another. In Mexico, application efficiencies gravity irrigation are below 50%. Although recent years the decision been made to pressurized systems increase efficiency use, border furrow is stil...