Automation of surface irrigation can be an economic and ecological way of increasing global food production. In this work a fully automated cablegation system is evaluated that adapts the application time and depth to the actual infiltration rate of the soil in real-time. The system calculates the infiltration equation from advance times in a control furrow and then simulates irrigation in every furrow of the f...
The Hargreaves–Samani (HS) evapotranspiration equation is very useful for the on-site irrigation management in data-short situations such as small and midsize farms and landscaped areas. Although much work has been performed to improve the precision of the evapotranspiration (ETo) estimates for use at new locations, the results have not been consistent and many have not been confirmed by other works. The purpos...
É geralmente aceite que o aumento das emissões de gases com efeito de estufa, e a utilização extensiva de combustíveis fósseis está a provocar uma alteração climática ao nível mundial. O crescimento das culturas é muito afectado pelo clima e as suas alterações podem afectar seriamente a segurança alimentar a nível global. Por outro lado, as reservas de água para a rega estão a diminuir e é importante avaliar os...
With greenhouses it is possible to increase crop production and reduce significantly the water use. Additionally advancements in electronics and shortage of water have led to the development of “smart” or adaptive irrigation controllers that adjust the water application depth to plant needs, and thus increase water savings. The two most common types are soil moisture based and evapotranspiration based systems. ...
Globally, irrigation is the main user of fresh water, and with the growing scarcity of this essential natural resource, it is becoming increasingly important to maximize efficiency of water usage. This implies proper management of irrigation and control of application depths in order to apply water effectively according to crop needs. Daily calculation of the Reference Potential Evapotranspiration (ETo) is an i...
A actividade humana, associada a uma utilização desmedida de combustíveis fósseis, tem produzido efeitos negativos sobre a fauna, a flora e o ciclo hidrológico. Para avaliar os efeitos sobre o ciclo hidrológico na região do Alentejo, foram estudados os registos meteorológicos disponíveis na base de dados do INAG de todas as estações da região. O estudo baseou-se em médias mensais e anuais de precipitação, tempe...
Agricultura de precisão - produção e qualidade na vinha.
This edition of Evapotranspiration - Remote Sensing and Modeling contains 23 chapters related to the modeling and simulation of evapotranspiration (ET) and remote sensing-based energy balance determination of ET. These areas are at the forefront of technologies that quantify the highly spatial ET from the Earth's surface. The topics describe mechanics of ET simulation from partially vegetated surfaces and stoma...
Globally, irrigation is the main user of fresh water, and with the growing scarcity of this essential natural resource, it is becoming increasingly important to maximize efficiency of water usage. This implies proper management of irrigation and control of application depths in order to apply water effectively according to crop needs. Daily calculation of the Reference Potential Evapotranspiration (ETo) is an i...
O livro "Estudos em desenvolvimento motor da criança V" corresponde a uma seleção dos trabalhos apresentados no VII Seminário de Desenvolvimento Motor da Criança, realizado na Escola Superior de Educação de Coimbra entre 12 e 13 de Outubro de 2012 ; O grande objectivo deste trabalho foi identificar as actividades realizadas nos tempos livres das crianças e jovens acolhidos em Lares de Infância e Juventude (LIJ...
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