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Design of microirrigation systems in sloping lands using linear programming
(2000-12-01)
When the area to be irrigated has a high slope gradient in the manifold line direction, an option is to use a tapered pipeline to economize on pipe costs and to keep the pressure head variations within desired limits. The ...
THE PERFORMANCE OF EXPLICIT FORMULAS FOR DETERMINING THE DARCY-WEISBACH FRICTION FACTOR
(Soc Brasil Engenharia Agricola, 2020-03-01)
The Darcy-Weisbach equation is the most recommended equation for determining the pressure loss in pressurized pipes because of its wide applicability. However, one of the largest obstacles to implementing this equation is ...
Modeling of hydraulic and energy efficiency indicators for water supply systems
(Elsevier B.V., 2015)
Aferição dos valores dos comprimentos equivalentes utilizados na determinação da perda de carga localizada
(Universidade Federal do Pampa, 2017)
Spatial variations in soil hydraulic conductivity in a Guarani Aquifer System recharge areaVariações espaciais na condutividade hidráulica do solo em área de recarga do Sistema Aquífero Guarani
(2019-01-01)
Data on the hydraulic conductivity of soils are important for the understanding of water infiltration processes, and contribute to reduce uncertainties in water balance estimation in watersheds. These data not only allow ...
Methods for measuring field-saturated hydraulic conductivity
(INST MEXICANO TECHNOLOGIAAGUA, 2005)
Double-ring infiltrometer, constant-head well permeameter, tension infiltrometer, and Porchet methods are compared to determine field-saturated hydraulic conductivity, K-fs. K-fs values of steady-state methods, which were ...
Alternative Analytical Expressions for the General van Genuchten-Mualem and van Genuchten-Burdine Hydraulic Conductivity Models
(SOIL SCI SOC AMER, 2011)
The van Genuchten expressions for the unsaturated soil hydraulic properties, first published in 1980, are used frequently in various vadose zone flow and transport applications assuming a specific relationship between the ...
Security-Constrained Unit Commitment Problem including thermal and pumped storage units: An MILP formulation by the application of linear approximations techniques
(Elsevier Science Sa, 2018-01)
This paper presents a new approach for solving Security Constrained Unit Commitment (SCUC) problems based on the application of several linear approximation techniques. Model considers thermal units, transmission constraints, ...