Charles A. Sanchez
University of Arizona
EngineeringHistosolCropNutrientHorticultureSoil waterHydraulicsChemistryGeotechnical engineeringLactucaFertilizerPerchlorateMathematicsHydrologyEnvironmental scienceSurface irrigationSoil testPhosphorusFunction (mathematics)BotanyAgronomyBiologyIrrigation
111Publications
26H-index
1,479Citations
Publications 108
Newest
#1Jorge M. Fonseca (USDA: United States Department of Agriculture)
#1Jorge M. Fonseca (USDA: United States Department of Agriculture)H-Index: 9
Last. Kurt D. Nolte (CFSAN: Center for Food Safety and Applied Nutrition)
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In the US Southwest, it is common to observe birds in leafy green fields, though the risk they contribute to foodborne outbreaks remains unclear. In this study, we investigated and recorded the relationship between birds near leafy green fields and the risk for contaminated irrigation water or leafy green plants. We monitored the presence of birds for over two years and performed cloacal swab analysis for non-pathogenic Escherichia coli, E. coli O157:H7 and Salmonellaenterica, while also monitor...
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#1Andrew N. French (ARS: Agricultural Research Service)H-Index: 39
#2Douglas J. Hunsaker (ARS: Agricultural Research Service)H-Index: 19
Last. Ray G. Anderson (ARS: Agricultural Research Service)H-Index: 17
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Abstract A three-year study was conducted to assess the ability of satellite-based vegetation index (VI) images to track evapotranspiration over wheat. While the ability of using VIs, notably with the Normalized Difference Vegetation Index (NDVI), to track vegetation growth has been well established, the operational capability to accurately estimate the crop coefficient (Kc) and crop evapotranspiration (ETc) at farm-scale from spaceborne platforms has not been widely studied. The study evaluated...
5 CitationsSource
#1Pierre C. GuillevicH-Index: 16
#2Jean-Claude RogerH-Index: 27
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This is the third manuscript of a three-part paper that presents the development and evaluation of a hydraulic simulation model for linear-move laterals equipped with pressure reducing valve (prvs). System description, model assumptions, and specification of the lateral hydraulic simulation problem are discussed in part-one of the paper. Formulation and numerical solution of the lateral hydraulic simulation problem are described in manuscript-two. Results of model evaluation and simulation examp...
This manuscript presents a hydraulic simulation model for linear-move sprinkler irrigation laterals equipped with pressure reducing valves (prvs). The linear-move lateral considered here consists of a series of arched spans with a specified geometry and multiple outlet-ports. Lateral diameter, hydraulic resistance characteristics, field slope, spacing between outlets, and sprinkler hydraulic characteristics can be constant or variable along a lateral. Lowpressure sprinklers, or spray nozzles, co...
An equation that expresses lateral pressure as an explicit function of distance from the lateral inlet is derived for linear-move sprinkler irrigation systems. The equation takes into account the effects of both field slope and span geometry on lateral pressure. The proposed equation is not intended for predictive use. Instead, it is used here in an additional evaluation of the validity of the unique pressure profile variability patterns, of linear-move laterals, produced in an earlier study thr...
#1Jean-Claude RogerH-Index: 27
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The pressure head profile of an irrigation lateral is a function of the hydraulic and geometric characteristics of the lateral and its slope. Slope effects on pressure variability along a lateral are typically limited. However, for a lateral with a spatially invariant parameter set well-defined relationships can be discerned between lateral slopes and the spatial patterns of the lateral pressure profiles. Thus, a comprehensive understanding of these relationships can be useful in the evaluation ...
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#1D. Zerihun (UA: University of Arizona)H-Index: 9
#2Charles A. Sanchez (UA: University of Arizona)H-Index: 26
AbstractLaterals constitute the basic element of a field-scale pressurized irrigation hydraulic network. The availability of accurate and robust computational methods applicable to lateral hydrauli...
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