Carmen Virginia Palau

Universitat Politècnica de València | UPV · Department of Rural and Agrifood Engineering

On numerous occasions, we often have very little information or must make a decision considering qualitative aspects that are difficult to evaluate. This study focuses on obtaining objective criteria to assist in decision-making in the design phase of pressurized water pipes in collective irrigation networks. In the layout of these networks, variou...

Multioutlet hydrants as joint network infrastructure remain briefly addressed in the literature. Studies have always been limited to the individual treatment of the hydraulic components but not as a whole element. This study presents the main problems in the field of multioutlet hydrants within hydraulic infrastructure for pressure irrigation netwo...

DIMSUB is a computer program to complement a decision support tool (DST) to effectively study different hydraulic design alternatives in microirrigation systems. We developed environments in Visual Basic for applications for Microsoft Excel® that allow specific step-by-step functions to be created for the design of irrigation subunits. Different al...

Electromagnetic and ultrasonic flowmeters are high precision devices that can measure the water flow in pressurized irrigation networks. In these networks, the inadequate installation distance of flow control valves generates upstream disturbances which will increase measurement errors and reduce the accuracy of the equipment. Therefore, estimating...

One of the unknowns in the instrumentation for water measurement is what degree of influence other hydraulic elements exert on the velocity profile and, consequently, on the measurement errors. In this work, the measurement errors of a horizontal-axis Woltman meter produced by a gate valve and by a butterfly valve in different hydraulic configurati...

As the correct measurement is an essential part of water management, this study describes the metrological behaviour of a range of bulk water meters under different installation configurations. The meters analysed included the horizontal and vertical Woltman, singlejet, tangential and proportional. Configurations included straight pipe lengths; gat...

To maintain quality measurement of water consumption, it is necessary to know the metrology of single-jet water meters over time. Knowing the accuracy of these instruments over time allows establishing a metrological operation period for different flow rates. This will aid water companies to optimize management and reduce economic losses due to una...

Venturi-type chemigation injectors are widely used due to their advantages: they do not require electric power and are cheap to operate. However, they also generate considerable energy losses which affect the pressure in the system. The correct characterization of these systems requires pressures to be correctly set at the inlet, injector and outle...

El objetivo de este estudio fue evaluar la calidad de la fruta de los tomates para diferentes frecuencias de riego en dos años de cultivo en la región costera del nordeste brasileño. El experimento fue conducido durante el período de agosto a diciembre de 2011 y 2012 en el área experimental de la Estación Meteorológica de la Universidad Federal del...

Esta comunicación presenta una experiencia docente llevada a cabo en la asignatura de Tecnología Hidráulica del Master de Ingeniería Agronómica para adquirir y evaluar la competencia transversal de “CT-05: Diseño y proyecto”. Para ello, mediante un proyecto real planteado en la asignatura, los alumnos por equipos desarrollaron por fases la resoluci...

Esta comunicación presenta la planificación y resultados obtenidos enasignatura de Ingeniería del Riego dentro del grado de IngenieríaAgroalimentaria y del Medio Rural tras la aplicación de metodologías activasde aprendizaje- enseñanza durante dos cursos académicos. Para ello,mediante el método del caso, los alumnos afrontan situaciones reales quer...

To determine the influence of geometry on the hydrodynamic behavior of Venturi injectors, using computational fluid dynamics techniques, we studied, at the Universitat Politècnica de València, Valencia, Spain, the geometric parameters that exert the most influence on head losses: the relationship between throat diameter and nozzle (β), nozzle angle...

1- Introduccion. Objetivo del trabajo. Los contadores de chorro multiple son elementos importantes en los hidrantes multiusuario de redes de riego, ya que son los encargados de contabilizar el volumen de agua consumido en cada parcela. La precision en la medida de estos consumos repercutira en el recibo del propio agricultor y en un reparto del agu...

The performance and installation alternatives of four Venturi injector prototypes were studied at Universitat Politècnica de València, Valencia, Spain (39°29' N; 0°23' W; 20 m). This device performance was studied under several parameters such as head loss, relation of flows and injection efficiency. The installation configurations analyzed were: w...

En la Universitat Politècnica de València, Valencia, España, se ha estudiado el diseño y funcionamiento de cuatro prototipos del inyector Venturi con técnicas de Dinámica de Fluidos Computacional (CFD), comparándo las con ensayos en laboratorio. Para cada prototipo, las geometrías definidas y analizadas han permitido simular el funcionamiento sin (...

The following work presents a multivariate statistical technique applied to the control of water inflows into district metering areas (DMAs) of urban networks. This technique, called principal-component analysis (PCA), allows for a sensitive and quick analysis of the inflows into a DMA without hassling mathematical algorithms. The PCA technique sim...

Water transients with entrapped air can originate large pressure peaks that can severely damage distribution networks. Entrapped air can have a damping or amplifying effect on these undesirable pressure peaks. Unfortunately, the complexity of the phenomenon too often makes it difficult to obtain a fully reliable prediction about when air pockets wi...

La Tesis doctoral presentada pretende aportar diversas experiencias y técnicas que permitan optimizar y profundizar en el conocimiento que se tiene del funcionamiento de los sistemas de medición utilizados en los abastecimientos de agua, tanto urbana como agrícola. El motivo no es otro que mostrar que una correcta medición del caudal y de los consu...

The amount of data collected by the SCADA (supervisory control and data acquisition) of an urban water supply system is sometimes difficult to process. A multivariate statistical technique, Principal Component Analysis (PCA) is presented in this paper, which processes this data, simplifying and synthesizing the most significant information. This te...

In order to improve water use efficiency in agriculture, on-farm irrigation scheduling should be harmonized with the water delivery infrastructures. The objective of this study was to determine the irrigation efficiency of a water use association (WUA) located in Valencia, Spain. The research was carried out during three seasons in an irrigation di...