The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT
Transactions ID Number: 27-634
Full Name: José Teixeira
Position: Associate Professor
Age: ON
Sex: Male
Address: ISA, Tapada da Ajuda, 1349-017, Lisbon, Portugal
Country: PORTUGAL
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E-mail address: jlteixeira@isa.utl.pt
Other E-mails: joaorolim@isa.utl.pt
Title of the Paper: IrrigRotation, a time continuous soil water balance model
Authors as they appear in the Paper: João Rolim, José Teixeira
Email addresses of all the authors: jlteixeira@isa.utl.pt, joaorolim@isa.utl.pt
Number of paper pages: 11
Abstract: Abstract: - The aim of this work was the development of the IrrigRotation software which is a soil water balance simulation model, based on the dual Kc methodology, that performs the soil water balance continuously in time using a daily time step. This continuous simulation allows to overcoming one of the greatest sources of uncertainty in the use of water balance models, which is the amount of available water in the soil profile at the beginning of the simulation. Thus, the initial error is diluted over the data time series, loosing is relevance. This model was built to be more flexible as possible, regarding the time series intervals, simulating time intervals from one day up to several years. The IrrigRotation can be applied either at a field level or at a regional level allowing the assessment of regional water irrigation requirements, trough its integration into the GIS software Geomedia 6.0. This model was implemented following an information system (IS) appr!
oach, and is composed by a graphic user interface, by several mathematical modules and a database. The methodology developed in this model, due to its continuous characteristic allows to consider the water needs of a sequence of crops and taking into account the water stored in the soil profile during the off-season time period, using a soil reservoir calculated according to the deepest root of the crop sequence/rotation. This way is possible to take into account the water requirements of a sequence of crops, including crop rotations, in opposition to traditional water balance models such as CROPWAT, ISAREG, PILOTE or more recently the SIMDualKc which typically perform the soil water balance only for the irrigation season and considering only one culture. The model was experimentally applied and tested for the Beja region, in Alentejo South of Portugal, providing irrigation requirements information based on the soil, crop, rotation scheme, climate and irrigation systems dat!
a. Weather data was obtained from a nearest meteorological station (Qu
inta da saúde - Beja).The first version of this system was successfully developed, allowing to compute the irrigation requirements of the sugar beet-maize-tomato-wheat crop rotation for the Beja region for the 2003-2007 period. Tests preformed evidence good model results.
Keywords: Irrigation, Crop rotations, Crop water requirements, Soil water balance, Water management, Simulation models, Information systems, GIS.
EXTENSION of the file: .pdf
Special (Invited) Session: A time continuous soil water balance model for crop rotation irrigation requirement analysis
Organizer of the Session: 588-212
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