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Análise distribuição da carga hidráulica e vazão na unidade operacional de um sistema de irrigação localizada
(2007-10-01)
The different combination possibilities of emission uniformity and field slope within the operational unities of localized irrigation systems favor the occurence of some configurations in the irrigation system, and ...
Bridging hydraulic diffusivity from aquifer to particle-size scale: a study on loess sediments from southwest Hungary
(Taylor &Francis Ltd, 2015-02-01)
In situ megascale hydraulic diffusivities (D) of a confined loess aquifer were estimated at various scales (10 <= L <= 1500 m) by a finite difference model, and laboratory microscale diffusivities of a loess sample ...
Modeling of hydraulic and energy efficiency indicators for water supply systems
(Elsevier B.V., 2015-08-01)
The present work approaches the necessity of the hydraulic and energetic efficiency indicator development for the management and decision making of water supply systems (WSSs) that can enable the comparison between the ...
Perda de carga em mangueiras gotejadoras novas e usadas
(2011-12-19)
This paper aims to determine the importance of emitter ́s local head loss in the hydraulic design of hose drip lines, as well as comparing the result of equations that calculate the local head loss; besides verifying the ...
Implementation of the Kalman Filter for a Geostatistical Bivariate Spatiotemporal Estimation of Hydraulic Conductivity in Aquifers
(MDPI, 2020-11)
The estimation of the hydraulic parameters of an aquifer such as the hydraulic conductivity is somehow complicated due to its heterogeneity, on the other hand field and laboratory tests are both time consuming and costly. ...
LOCAL HEAD LOSS OF NON-COAXIAL EMITTERS INSERTED IN POLYETHYLENE PIPE
(AMER SOC AGRICULTURAL & BIOLOGICAL ENGINEERS, 2009)
The design of a lateral line for drip irrigation requires accurate evaluation of head losses in not only the pipe but in the emitters as well. A procedure was developed to determine localized head losses within the emitters ...
Measuring Hydraulic Conductivity to Wilting Point Using Polymer Tensiometers in an Evaporation Experiment
(SOIL SCI SOC AMER, 2011)
The polymer tensiometer is a novel instrument to measure soil water pressure heads from saturation to permanent wilting conditions. We used tensiometers of this type in an experiment to determine the hydraulic properties ...
Spatial variability of soil hydraulic properties on a steep slope in the loess plateau of China
(São Paulo - Escola Superior de Agricultura Luiz de Queiroz, 2008)
The understanding of the structure of the spatial variability of soil surface hydraulic properties on steep slopes is important for modeling infiltration and runoff processes. The objective of this study was to investigate ...
Simple functions for describing soil water retention and the unsaturated hydraulic conductivity from saturation to complete dryness
(2020-09-01)
Many applications require accurate soil hydraulic functions that can describe the dynamics of water in variably saturated systems from full saturation to complete dryness. Current functions considering zero water content ...
Closed-form hydraulic conductivity equations for multimodal unsaturated soil hydraulic properties
(2022-01-01)
Closed-form expressions of the hydraulic conductivity function for linearly superposed subretention (multimodal) functions were derived for arbitrary sets of the Brooks and Corey (BC), van Genuchten (VG), and Kosugi (KO) ...