CSE algorithm: ‘canal survey estimation’ to evaluate the flow rate extractions and hydraulic state in irrigation canals

One of the main problems in water management of irrigation systems is the control of the equitable distribution of water among different orifice offtakes. The difficulty of managing a canal is partly caused by the lack of knowledge of the canal state because the scheduled demand is often not fulfill...

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Bibliographic Details
Published in:Journal of hydroinformatics 2017-01, Vol.19 (1), p.62-80
Main Authors: Bonet, Enrique, Gómez, Manuel, Soler, Joan, Yubero, M. T.
Format: Article
Language:English
Subjects:
agricultural demands
Agricultural production
Algorithms
Automation
Automatització
canal control
Canals
Canals i regadius
Case studies
Controllers
Engineering
Enginyeria civil
Enginyeria hidràulica, marítima i sanitària
Farmers
Farms
Feedback
Feedback control
flow rate extractions
Flow rates
Flow velocity
Hydraulics
Hydrodynamics
Inverse problems
Irrigation
Irrigation canals
Irrigation systems
Irrigation water
Laboratories
Mathematical models
Modelling
Open-channel flow
optimization algorithms
Surveying
Sèquies
Velocity
Water levels
Water management
Àrees temàtiques de la UPC
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Summary:One of the main problems in water management of irrigation systems is the control of the equitable distribution of water among different orifice offtakes. The difficulty of managing a canal is partly caused by the lack of knowledge of the canal state because the scheduled demand is often not fulfilled, since farmers extract more water than is scheduled and it is impossible for the watermaster to determine the canal state. However, an innovative developed algorithm called CSE is proposed in this paper. This algorithm is able to estimate the real extracted flow and the hydrodynamic canal state (that is, the water level and velocity along the irrigation canal). The algorithm solves an inverse problem implemented as a nonlinear optimization problem using the Levenberg–Marquardt method. The algorithm is tested, taking into account several numerical examples, and a practical implementation is made for a real case study in the PAC-UPC canal, a 220 m laboratory canal especially designed for research into irrigation canal control area and irrigation canal modelling. This useful algorithm evaluates the real extraction flow and the canal state and could be a useful tool for a feedback controller.
ISSN:1464-7141
1465-1734
DOI:10.2166/hydro.2016.014