Experimental validation of a methodology to control irrigation canals based on Saint-Venant equations

Litrico, Xavier; Fromion, Vincent; Baume, Jean-Pierre; Arranja, Carina; Rijo, Manuel

doi:10.1016/j.conengprac.2004.12.010

Cited by 103 publications

(54 citation statements)

References 14 publications

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“…Reordering the terms and applying the boundary conditions at the upstream and the downstream, the Saint-Venant's transfer matrix is given by (Litrico et al 2005;Sreeja and Gupta 2007),…”

Section: Formulation Of Transfer Function For Drainage Channelsmentioning

confidence: 99%

Transfer Function Formulation of Saint-Venant’s Equations for Modeling Drainage Channel Flow: An Experimental Evaluation

Pekkat

Gupta

2008

Water Resour Manage

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Space constraints in developed urban cities necessitate utilizing existing capacity of the drainage system for actively controlling and optimizing the flow during a flood event. This is mainly achieved by the use of non-structural control measures (in the form of suitable controllers and control strategies) for controlling existing structures such as gates in the drainage system. However, the timely opening and closing of gates is fully governed by the rapid feedback and real time control of these structures. Hence, for an extreme rainfall event and flooding, it is necessary to rapidly model the peak flow and time to peak in the drainage system, the results of which can be used for the timely operation of the control structures. Owing to the fact that the conventional modeling methods are quite time consuming and cumbersome, a simplified approach based on transfer function formulation of Saint-Venant's equations have been proposed in this study. The simplified approach has been validated with the help of carefully planned laboratory experiments in which a test setup consisting of a model drainage channel with upstream and downstream gates have been developed. This laboratory model was used to simulate different flow conditions by the appropriate opening and closing of upstream and downstream gates. It was noted that the results obtained using the simplified approach matches well with the experimentally observed trends. This demonstrates the robustness of the new simplified approach for modeling flow conditions in drainage system.

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“…Reordering the terms and applying the boundary conditions at the upstream and the downstream, the Saint-Venant's transfer matrix is given by (Litrico et al 2005;Sreeja and Gupta 2007),…”

Section: Formulation Of Transfer Function For Drainage Channelsmentioning

confidence: 99%

Transfer Function Formulation of Saint-Venant’s Equations for Modeling Drainage Channel Flow: An Experimental Evaluation

Pekkat

Gupta

2008

Water Resour Manage

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“…Em redes automatizadas, normalmente são utilizados reguladores eletromecânicos cujas vazões fornecidas são ajustadas automaticamente em função dos sinais emitidos por sensores de nível de água (LITRICO et al, 2005b). Além de facilitar o manejo da água em redes de canais, o uso destes reguladores pode reduzir significativamente as perdas de água.…”

Section: Introductionunclassified

Desempenho de um regulador automático de vazão para canais de irrigação

Amaral¹,

Ramos²,

Silva³

et al. 2010

Eng. Agríc.

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RESUMO:As estruturas de controle comumente utilizadas nas tomadas de água dos canais de irrigação não permitem a distribuição da quantidade correta de água, favorecendo o desperdício e, consequentemente, reduzindo a eficiência no uso da água. O objetivo deste trabalho foi determinar o desempenho de um regulador automático de vazão no controle da vazão derivada. Para tanto, um exemplar do equipamento, construído em fibra de vidro, foi instalado na lateral de um canal de concreto do Laboratório de Hidráulica da Universidade Federal de Viçosa, em Viçosa-MG. O equipamento foi avaliado em toda a sua faixa de operação, sendo que, em cada regulagem prefixada, determinou-se a vazão derivada com o nível da água a montante variando de 0,30 a 0,45 m. A variação média na vazão do regulador, considerando toda a sua faixa de operação, foi de ± 2,3% em relação às vazões médias fornecidas pelo equipamento em cada regulagem. A amplitude de variação na vazão fornecida foi pequena em relação aos equipamentos usualmente empregados no controle de vazão, em canais de irrigação, demonstrando que o regulador automático de vazão é um equipamento apropriado para a distribuição de água em redes de canais. PALAVRAS-CHAVE:automação hidráulica, comportas hidráulicas, condutos livres. PERFORMANCE OF AN AUTOMATIC DISCHARGE REGULATOR FOR IRRIGATION CHANNELS ABSTRACT:The control structures commonly used in irrigation channels water intakes are inefficient in delivering the correct water volume to crops, collaborating to water waste and, hence, reducing the water use efficiency. The objective of this work was to determine the performance of an automatic discharge regulator in the control of the supplied discharge. The regulator was made of fiberglass and its evaluation was accomplished in a concrete channel belonging to the Hydraulic Laboratory of the Federal University of Viçosa, in Viçosa, state of Minas Gerais, Brazil. The evaluation was performed for all equipment discharge regulation options. In each regulation, the supplied discharge was determined for the upstream water level changing from 0.30 to 0.45 m. The regulator discharge mean variation, with regard to all regulation options, was of ± 2.3% of the mean discharge supplied by the equipment in each regulation option. The discharge variation of the developed equipment was smaller than the discharge variation of the structures commonly used to control the discharge in channels, showing that the automatic flow regulator is a good alternative to regulate discharges in open channels.

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“…In this section we show numerically that a calibrated Hayami model would provide us with an open-loop control law that steers the Saint-Venant equation solution at x = L or the flow discharge at the weir to the desired discharge fairly accurately. For the purpose of the simulation we will use SIC, a computer program developed by Cemagref [12] to simulate the upstream discharge and the measurement discharge at the downstream. SIC solves the full nonlinear Saint-Venant equations using a finite difference scheme (Preissmann scheme).…”

Section: B Saint-venant Model Simulationmentioning

confidence: 99%