8 documents found, page 1 of 1
Water use, soil water balance and soil salinization risks of Mediterranean tree...
Ramos, Tiago B.; Darouich, Hanaa; Oliveira, Ana R.; Farzamian, Mohammad; Monteiro, Tomás; Castanheira, Nádia; Paz, Ana; Alexandre, CarlosSecondary salinization has long been reported in the Roxo irrigation district (RID), southern Portugal, due to the use of saline-prone irrigation water and the existence of poorly structured soils. This study assessed the soil water and salt budgets in nine commercial orchards located in the RID using the multiple ion chemistry module available in the HYDRUS-1D model during the 2019 and 2020 growing seasons. Th...
Setting irrigation thresholds for building a platform aimed at the improved man...
Darouich, Hanaa; Karfoul, Razan; Ramos, Tiago B.; Pereira, Luís S.Citrus is one of the most valuable crops in Syria, with the largest production areas being in the coastal provinces of Tartus and Latakia, where this study was performed. A companion paper reported on the basal crop coefficients derived from the field water balance and on the performance assessment of various irrigation methods used in a citrus orchard located in the same region. That study evidenced the need f...
Water use and soil water balance of Mediterranean tree crops assessed with the ...
Ramos, Tiago B.; Darouich, Hanaa; Oliveira, Ana R.; Farzamian, Mohammad; Monteiro, Tomás; Castanheira, Nádia; Paz, Ana; Gonçalves, Maria C.Orchards consist of complex agricultural systems, with a variety of characteristics (planting density, tree height, training system, canopy cover, irrigation method, interrow management) influencing crop evapotranspiration (ETc). Thus, irrigation water management requires finding crop coefficients (Kc) that represent the characteristics of local orchards, evidencing the need for site specific data. The main obj...
Setting Irrigation Thresholds for Building a Platform Aimed at the Improved Man...
Darouich, Hanaa; Karfoul, Razan; Ramos, Tiago B.; Pereira, Luís S.Citrus is one of the most valuable crops in Syria, with the largest production areas being in the coastal provinces of Tartus and Latakia, where this study was performed. A companion paper reported on the basal crop coefficients derived from the field water balance and on the performance assessment of various irrigation methods used in a citrus orchard located in the same region. That study evidenced the need f...
Satellite-based evapotranspiration of a super-intensive olive orchard: Applicat...
Poças, Isabel; Paço, Teresa A.; Cunha, Mário; Andrade, José A.; Silvestre, José; Sousa, Adélia; Santos, Francisco L.; Pereira, Luís S.METRIC™is a satellite-based surface energy balance model aimed at estimating and map-ping crop evapotranspiration (ET). It has been applied to a large range of vegetation types,mostly annual crops. When applied to anisotropic woody canopies, such as olive orchards,extensions are required to algorithms for estimating the leaf area index (LAI), surfacetemperature, and momentum roughness length (Zom). The computat...
MIRRIG: a decision support system for design and evaluation of microirrigation ...
Pedras, Celestina M. G.; Pereira, Luís S.; Gonçalves, JorgeThe decision support system (DSS) MIRRIG has been developed to support the design of microirrigation systems and to advise farmers as a result of field evaluations. It is written in Visual Basic 6.0, runs in a Windows environment, and uses a database with information on emitters and pipes available in the market, as well as on crops, soils and the systems under design. MIRRIG is composed by design and simulatio...
Multicriteria analysis for design of microirrigation systems. Application and s...
Pedras, Celestina M. G.; Pereira, Luís S.This paper presents a practical application of the DSS MIRRIG for the design of a microirrigation system for a citrus orchard in Algarve (Portugal). Several alternatives were considered using different emitter types (drippers, sprayers, pressure-compensating and non-pressure compensatingemitters), different pipe sizesandlayouts withand without pressure regulation valves, as well as different pressure head and d...
Modelo de simulação para projecto e avaliação de sistemas de rega localizada
Pedras, Celestina M. G.; Pereira, Luís S.O modelo iterativo AVALOC, em linguagem VISUAL BASIC 4.0, foi desenvolvido para o dimensionamento e a análise de funcionamento de sistemas de rega localizada (ou microrrega). O modelo apoia-se numa base de dados contendo informação relativa aos emissores e aos tubos disponíveis no comércio, e aos sectores de rega a que é aplicado o programa. A base de dados permite com relativa facilidade a introdução, a consul...